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2Qute DAC

xxx แบรนด์: CHORD ELECTRONICS

รหัสสินค้า: 2Qute

฿55,000

The new 2Qute is a compact, affordable standalone DAC which combines two award-winning products in one: the revolutionary Hugo DAC/headphone amp and the class-leading Qute EX standalone DAC. 

The new 2Qute takes the technology from What Hi-Fi? Sound and Vision's 2014 Best DAC - (Hugo) and adds it to What Hi-Fi? Sound and Vision's 2014 Best DAC £700 - £1,000 (Qute EX). The result is a new super-DAC for 2015 with class-leading specification, outstanding technical measurements and proven sonic performance.

2Qute advances the award-winning Qute EX DAC into 2015 with the latest Hugo specification. Essentially a Hugo in a Chordette chassis, it brings the latest FPGA DAC technology into an affordable home-system-orientated unit. 2Qute contains the same high-performance Spartan 6 FPGA that has enabled Hugo to redefine the DAC genre in 2014. The 2Qute also boasts astonishingly low distortion levels of 0.0003%.

The 2Qute offers support for up to 32-bit/384kHz audio via coax and USB, and 24-bit/192kHz over optical. DSD64 is supported on all inputs and DSD128 is supported via coax or USB (all via DoP). The new DAC also gains a handy switch to easily move between coax, optical and USB digital inputs. 

The device features a Class 2 USB input which, because of the 2Qute's home-system orientation compared to Hugo's more mobile aspirations, has been galvanically isolated for greater sonic performance. This has been achieved using a novel technique which allows for very high data rates of up to 384kHz; the input is driverless on Apple and Android devices, with (ASIO included) drivers for Windows devices.

2Qute key features

- Coax, optical and USB digital inputs with input switch
- Galvanically isolated Class 2 USB input up to 384kHz 
- Driverless operation on Apple and Android devices; drivers supplied for Windows
- Support for up to 32-bit/384kHz audio via coax and USB, and 24-bit/192kHz via optical
- DSD64 supported on all inputs, DSD128 supported via coax or USB input (all via DoP)
- Source and sample rate indication/illumination
- 12V 0.5A power supply provided

Measured performance

Output: 3v RMS 1kHz
Dynamic range: -119dB A Wt
THD: 0.0003% at 3v RMS 1kHz
Crosstalk: 126dB 1kHz
Frequency Response: +/- 0.1dB 20-20kHz

2Qute DAC
฿55,000
The new 2Qute is a compact, affordable standalone DAC which combines two award-winning products in one: the revolutionary Hugo DAC/headphone amp and the class-leading Qute EX standalone DAC. ..
฿55,000

AURALiC - VEGA

xxx แบรนด์: AURALiC

รหัสสินค้า: AURALiC - VEGA

฿135,000

AURALiC VEGA
 

Auralic – VEGA

VEGA เป็น DAC ระดับสูงที่ได้รับการสรรสร้างให้เป็นอุปกรณ์ที่ปราศจากการประณีประนอมใดๆ อันจะทำให้คุณภาพเสียงด้อยลงแม้เพียงเล็กน้อยก็ตาม  ด้วยจำนวนพอร์ทอินพุทและเอาท์พุทที่มากมายกับฟังก์ชั่นการทำงานที่ทรงประสิทธิภาพ  VEGA จะเป็นองค์ประกอบหลักที่สำคัญยิ่งของระบบเสียงไฮเอ็นด์ของท่านอย่างมิต้องสงสัยใดๆ   VEGA ใช้ Sanctuary Audio Processor เป็นหัวใจหลักของการประมวลผลภาคเสียงที่ยอดเยี่ยม  Auralic ได้ใส่ฟีเจอร์การทำงานที่ใช้เทคโนโลยีระดับหัวกะทิไว้หลายอย่างใน  VEGA อาทิ  Megahertz  Up-sampling Algorithm ที่ทำการ Up-Samples สัญญาณเสียง PCM ขึ้นไปถึงระดับ 1.5 MHz ที่คุณภาพ 32 bit

Femto Master Clock ที่จัดการระบบสัญญาณเวลาได้อย่างเที่ยงตรงสูงสุดโดยที่มี Jitter เพียง 82 Femto seconds (0.082 picosecond)

ORFEO Class A Module และภาคจ่ายไฟ “Purer Power” แบบ Discrete ที่สะอาดบริสุทธิ์เพื่อคุณภาพอันสูงสุดของระบบการเล่นไฟล์รายละเอียดสูง

VEGA สนับสนุนการเล่นไฟล์รายละเอียดสูงได้ทุกฟอร์แมทรวมถึง DXD (352.8 KS/S, 384 KS/S in 32 bit) และ DSD Stream ที่ 2  8224 MHz และ 5.6448 MHz  อินพุทดิจิตอล 5 ช่องประกอบไปด้วย AES/EBU, Coaxial (2), Toslink และ USB  เอาท์พุททั้งแบบ Balanced และ Single-ended  สามารถต่อกับเพาเวอร์แอมป์ได้โดยตรงแล้วปรับระดับสัญญาณเสียงแบบดิจิตอลที่ไร้การสูญเสียของสัญญาณได้ที่ตัวเครื่อง VEGA ได้ทันที

VEGA มีระบบ Filter ที่โด่งดัง นั่นคือ Flexible Filter Mode ที่ให้ผู้ใช้สามารถเลือก Filter ให้เหมาะกับความชอบของตัวเองได้ถึง 6 โหมด  โดยแต่ละโหมดทำงานประกอบไปด้วย Digital filter หลายตัวที่ออกแบบให้ทำงานได้อย่างดีที่สุดกับอัตราสุ่มความถี่ที่เลือกใช้  ฟิลเตอร์เหล่านี้ถูกพัฒนาขึ้นเป็นการเฉพาะโดย Auralic เพื่อผู้ใช้ของผลิตภัณฑ์ Auralic เท่านั้น  ซึ่งผู้ใช้สามารถปรับจูนเสียงเพื่อให้เหมาะสมกับดนตรีที่แตกต่างกันตามความชอบของผู้ใช้

 

ฟีเจอร์ทางเทคนิค

Auralic Sanctuary Audio Processor

นับเป็นหัวใจหลักในการทำงานของ VEGA  หน่วยประมวลผลนี้เป็นสถาปัตยกรรมที่มีพื้นฐานมาจาก Multi-Core ARM9 พร้อมความสามารถในการคำนวณระดับ 1000 MIPS ซึ่งมีความเหมาะสมในการจัดการกับการเล่นเพลงรายละเอียดสูงแบบ Multi-Channel ได้อย่างดีเยี่ยม  นอกจากนี้ยังมีการใช้ Active USB ซึ่งนับเป็นการพัฒนามาถึงรุ่นที่ 2 เพื่อใช้งานกับ VEGA  จุดเด่นของระบบ Active USB คือการแยก USB PHY ไปยัง Discrete Chip เพื่อการลด EMI จากตัวเครื่องคอมพิวเตอร์  การนำเทคโนโลยีที่ทันสมัยเหล่านี้มาใช้  VEGA ไม่เพียงแค่สนับสนุน DXD Format (352.8 KS/S และ 384 KS/S PCM Signal in 32 bit)  แต่ยังสามารถถอดรหัส DSD Stream ที่ 2.8224 MHz และ 5.6448 MHz ในแบบ Native ผ่านทางมาตรฐานการส่งข้อมูลแบบ DOP V1.1 ได้ด้วย

Flexible Filter Mode

เทคโนโลยี  Flexible Filter Mode นี้มีถึง 6 โหมดทำงานให้ผู้ใช้เลือกใช้งาน  โดยในแต่ละโหมดจะประกอบไปด้วย Digital Filter หลายตัวที่ออกแบบให้ทำงานได้อย่างดีที่สุดกับอัตราสุ่มความถี่ที่เลือกใช้  ฟิลเตอร์เหล่านี้ถูกพัฒนาขึ้นเป็นการเฉพาะโดย Auralic เพื่อผู้ใช้ของผลิตภัณฑ์ Auralic โดยเฉพาะโดยที่ผู้ใช้สามารถปรับจูนเสียงให้เหมาะสมกับดนตรีที่แตกต่างกันตามความชอบของผู้ใช้

Filter แบบ Linear Phase มีความโดดเด่นในด้าน In-Band Ripple and Out-Band Attenuation ในขณะที่ Minimum Phase Filter นั้นเหมาะกับการฟังแบบผ่อนคลาย  เนื่องจากไม่มีปัญหาในด้าน “Pre-ringing” และยังมีฟิลเตอร์แบบ Slow Roll-Off และ Noise Filter อื่นๆอีกหลายแบบสำหรับ Native DSD Conversion   ผู้ใช้ VEGA สามารถปรับจูนฟีเจอร์เหล่านี้เพื่อให้เหมาะกับความชอบของตัวเองได้อย่างเห็นผล  ผู้ใช้สามารถดาวน์โหลด  “Technical White Paper” ของ Flexible Filter Mode ในรายละเอียดที่ลึกขึ้นได้

 

Femto Master Clock

เป้าหมายหลักของเทคโนโลยี Femto Master Clock คือการจัดสัญญาณเวลาที่เที่ยงตรงที่สุดโดยมี Jitter และ Phase Noise ในปริมาณที่ต่ำสุดให้กับ DAC และวงจร Up-sampling  มีการใช้ Crystal Oscillator เกรดอากาศยาน  ภาคจ่ายไฟชนิด Linear สัญญาณรบกวนต่ำและเทคโนโลยีด้านการชดเชยอุณหภูมิ เพื่อที่จะสร้างสัญญาณเวลาใหม่ที่มี Jitter ต่ำสุดระดับ 82 Femto Seconds  สิ่งสำคัญที่สุดคือ Phase Noise ซึ่งให้ผลร้ายต่อเสียงได้เป็นอย่างมาก ก็ได้ถูกจัดการขจัดจนเหลือเพียง -168 dBC/Hz  VEGA มีความเที่ยงตรงของ Clock ให้ผู้ใช้ได้เลือกใช้งาน 3 ระดับโดยที่ระดับสูงสุดคือ “Exact Mode” ที่มีความเที่ยงตรงสูงสุดในระดับอ้างอิง    VEGA สามารถถ่ายทอดรายละเอียดดนตรีได้อย่างหมดจด พร้อมด้วยมิติเสียงแบบสเตอริโอที่น่าตื่นตาตื่นใจอย่างไม่เคยสัมผัสที่ใดมาก่อน

  

Megahertz Up-sampling

ใช้สถาปัตยกรรมด้านเสียงที่ทันสมัยที่สุด Megahertz Up-sampling ทำการ Up-sampling สัญญาณ PCM ไปที่ระดับ 1.5 MHz ที่คุณภาพ 32 bit ซึ่งสามารถยกระดับความเที่ยงตรงของ DAC ได้เป็นอย่างมากและยังช่วยเพิ่มความถี่สัญญาณ PCM ให้กว้างขึ้นกว่าเดิมอีกด้วย  ผลที่ตามมาคือ ทีมวิศวกรของ Auralic สามารถออกแบบวงจรอนาล็อกใหม่ที่มีช่องการตอบสนองความถี่ที่กว้างขึ้น และมีค่า Slew Rate ที่เร็วขึ้น  เมื่อเปรียบเทียบกับงานออกแบบก่อนหน้านี้ โครงสร้างที่ออกแบบใหม่สามารถถ่ายทอดสัญญาณเสียงได้ดีกว่า  มีความผิดเพี้ยนของสัญญาณเสียงที่ต่ำกว่า  มีสัญญาณรบกวนน้อยกว่า  และที่สำคัญคือช่วยทำให้คุณภาพเสียงในความละเอียดระดับซีดีให้เสียงที่อิ่มมีมวลเสียงที่น่าฟัง มีความนุ่มนวลเป็นธรรมชาติกว่าเดิมมาก

 

Auralic ORFEO Class A Output Module

 เป็นภาคขยายสัญญาณแบบ Class A ที่มีพื้นฐานมาจากวงจร Neve8078 ที่สามารถขับโหลดทำงานต่างๆ ได้อย่างดีเยี่ยม  หลักการที่สำคัญของวงจรทำงานชนิดนี้คือการใช้อุปกรณ์ขนาดเล็กแต่ใช้ในจำนวนหลายตัว เพื่อผลการทำงานที่มีความราบเรียบ เที่ยงตรงสูงกว่าแบบทั่วไป  การใช้งานอุปกรณ์เหล่านี้ต้องใช้กระบวนการพิเศษ Thermal Balance Procedure และใช้ไฟป้อนการทำงานให้ทรานซิสเตอร์ทำงานในแบบ Class A

ORFEO เป็นภาคขยายสัญญาณที่ให้ค่าความเพี้ยนต่ำกว่า 0.001% ORFEO Module ที่ใช้งานใน VEGA ได้รับการปรับจูนให้มีระดับสัญญาณรบกวนที่ต่ำมาก ในขณะที่มีความสามารถในการขับโหลดความต้านทานสูง ระดับ 600 โอห์มได้อย่างปราศจากความเพี้ยน

 

คุณสมบัติทางเทคนิค

การตอบสนองความถี่              20 Hz – 20 KHz +/- 0.1 dB

ความเพี้ยน                            น้อยกว่า 0.00015%, 20 Hz – 20 KHz @ 0 dBFS

Dynamic Range                   130 dB, 20 Hz – 20 KHz, A-Weighted

Digital Inputs                        1* AES/ EBU

                                             2* Coaxial

                                             1* Toslink

                                             1* USB 2.0 buffetered by Active USB

Analog Output            s         1* Balanced XLR (ความต้านทานเอาท์พุท 4.7 ohm)

                                              1* Single-ended RCA (ความต้านทานเอาท์พุท 50 ohm)

ไฟล์ Format ที่สนับสนุน          All PCM from 44.1 KS/S to 384 KS/S in 32 bit**

                                              DSD64, DSD128, DSD256 ***

ความแรงสัญญาณ                    4 Vrms พร้อมโวลลุ่มดิจิตอลที่ปลอดการสูญเสียสัญญาณ

อินเตอร์เฟสผู้ใช้งาน                 Auralic RC-1 รีโมท

                                              จอแสดงผล OLED 512 x 64 pixels

กำลังไฟ                                  เปิดเครื่องรอใช้งาน น้อยกว่า 2 W

                                              โหมด Sleep น้อยกว่า 10 W

                                              โหมดใช้งาน 15 W สูงสุด

ขนาด                                      33 x 23 x 6.5 ซม. (กว้าง x ลึก x สูง)

น้ำหนัก                                    7.5 ปอนด์ (3.4 กิโลกรัม)

 

*          ทดสอบภายใต้ Filter Mode 1 ในทุกความถี่สัญญาณ

**        352.8 KS/S และ 384 KS/S เฉพาะ USB เท่านั้น

**        32 bit เฉพาะ USB เท่านั้น

***      โดย Dop V1.1 Protocol Through USB

AURALiC - VEGA
฿135,000
AURALiC VEGA Auralic – VEGAVEGA เป็น DAC ระดับสูงที่ได้รับการสรรสร้างให้เป็นอุปกรณ์ที่ปราศจากการประณีประนอมใดๆ อันจะทำให้คุณภาพเสียงด้อยลงแม้เพียงเล็กน้อยก็ตาม  ด้วยจำนวนพอร์ทอินพุทและเ..
฿135,000

Available Options

BENCHMARK DAC2 DX - DIGITAL TO ANALOG AUDIO CONVERTER

xxx แบรนด์: BENCHMARK

รหัสสินค้า: BENCHMARK DAC2 DX - DIGITAL TO ANALOG AUDIO CONVERTER

฿73,800

BENCHMARK PERFORMANCE

The DAC2 DX is Benchmark's newest 2-channel D/A converter. When compared to the legendary DAC1, the DAC2 has lower noise, lower distortion, and improved accuracy. The DAC1 became a reference standard in many of the finest recording studios and mastering rooms. The DAC2 defines a new reference.

DAC2 converters deliver outstanding musical detail and precise stereo imaging. They employ an advanced high-headroom digital filter design, and a new high-sample-rate Asynchronous USB Audio interface. All inputs are fully isolated from interface jitter by Benchmark's new UltraLock2™ jitter attenuation system.

Internal digital processing and conversion is 32-bits, and includes 3.5 dB of headroom above 0 dBFS. Three balanced 32-bit D/A converters are summed together to form the main output bus. Two channels are reserved for the auxiliary RCA output bus.

The performance of the DAC2 DX exceeds the measurement limits of today's state-of-the art test equipment.

NATIVE DSD CONVERSION

DSD (in DoP 1.1 format) is automatically detected on USB, coaxial, and XLR digital inputs. The system seamlessly switches between native DSD and native PCM conversion. DoP 1.1 is supported by many media players, and DSD downloads are now available from several sources.

Enjoy seamless transitions between native DSD and native PCM playback.

DIRECT CONNECTIVITY TO POWER AMPLIFIERS AND POWERED MONITORS

Benchmark DAC1 and DAC2 converters are designed to directly drive power amplifiers and powered speakers. Benchmark converters feature adjustable low-impedance passive attenuators at the XLR outputs that can be used to optimize the interface to the power amplifier (or powered monitor). The sonic importance of these attenuators cannot be overemphasized. Proper gain matching between the DAC/preamplifier and the power amplifier is essential for achieving peak system performance. The attenuators allow precise matching to all amplifiers and powered monitors.

Passive output attenuators are only found on Benchmark converters - don't settle for anything less.

SONICALLY NEUTRAL

All Benchmark converters are designed for maximum transparency. This transparency is absolutely essential in the studio monitoring chain. DAC2 converters are ideal for critical reference-quality professional systems. In home applications, the DAC2 delivers the sonic signature that was created in the recording studio.

Hear the music exactly as it was heard in the studio.

TAKE THE STUDIO HOME

When Benchmark's professional converters are used in hi-fi applications, studio-quality sound can be enjoyed in a home environment.

Discover the natural, uncolored, analog sound of the DAC2.

THE DIGITAL-ONLY DAC2 FOR AUDIO PROFESSIONALS

The DAC2 DX is the DAC2 of choice for users who do not need analog inputs.

The DX is well suited to the needs of professional users and includes an XLR AES digital input. The DAC2 DX is the only DAC2 model that includes dual stereo output buses. The analog output buses can be independently set to fixed or variable gain. The DAC2 DX is also the only DAC2 available in a rack-mount version.

A NEW REFERENCE - GOING BEYOND THE LEGENDARY DAC1

Benchmark's DAC1 family of D/A converters have been the reference to which other converters have been compared. It is rare to find a converter review that does not draw comparisons to the DAC1. The DAC1 has been the best-selling 2-channel reference-quality converter and is in daily use at many of the finest recording studios and mastering rooms. DAC1 converters are also enjoyed by thousands of audiophiles. Benchmark has raised the bar ... the DAC2 defines a new reference.

THE DAC2 DX REPLACES THE DAC2 D

The DAC2 DX replaces the DAC2 D while adding several important features:

  • Dual analog output buses
  • XLR AES digital input
  • 12V trigger I/O
  • Improved DIM and MUTE functions

PROFESSIONAL APPLICATIONS

  • Reference-Quality Studio Monitoring
  • Sound-Card Elimination for Computer Audio
  • Stand-Alone Headphone Amplifier for Digital Sources
  • USB to SPDIF Transfer Device

HI-FI APPLICATIONS

The DAC2 DX uses digital connections (USB, Optical, Coaxial, or AES) to bypass the low-quality built-in converters that are included in many audio products. 

  • Audio Output Device for Music and Video Servers
  • Home Hi-Fi Playback from Digital Sources
  • Audio Output Device for TV and Home Theater Systems 

ADD BENCHMARK CABLES TO COMPLETE YOUR NEW SYSTEM

Benchmark offers a no-nonsense selection of very high-quality cables. Benchmark cablesare designed for durability and transparency, and most are manufactured in the USA. Our optical cables are manufactured in Canada.

BENCHMARK TECHNOLOGIES

Benchmark includes some exciting technologies in the DAC2:

  • Hybrid Gain Control
  • Low-Impedance Passive Output Attenuators
  • High-Headroom DSP
  • UltraLock2™ Jitter Attenuation System
  • High-Headroom 32-bit DSP
  • Quad 32-bit balanced D/A Conversion System
  • Multi-Mode Asynchronous USB Audio System
  • Digital Diagnostic Display
  • Volume-Control Bypass
  • Digital Pass Through
  • Distributed Power Regulation
  • "Zero-Ohm" HPA2™ Headphone Amplifier

HYBRID GAIN CONTROL

The DAC2 DX combines active analog gain control, passive low-impedance attenuators, a 32-bit digital gain control, and a servo-driven volume control. All analog outputs are controlled by the rotary volume control unless the volume-control bypass function is selected. This volume control moves in response to commands from the remote control. Audio does not pass through the volume control. The position of the rotary knob is precisely measured, and digital gain coefficients are calculated. The gain coefficients are filtered and passed to a 32-bit high-headroom DSP system. The 32-bit output of this system is connected directly to the array of 32-bit digital to analog converters. This system can provide a wide range of volume control without losing resolution. The DSP system preserves precise L/R balance, and precise stereo imaging, while avoiding any source of noise and distortion.

The volume control is one of the most critical functions in the audio chain, enjoy the best system available.

LOW-IMPEDANCE PASSIVE OUTPUT ATTENUATORS

Benchmark's unique passive output attenuators provide distortion-free gain reduction without reducing the dynamic range (or SNR) of the converter. The attenuators optimize the gain staging between the DAC2 DX and the power amplifier. This optimization is absolutely essential for maximizing the dynamic range of the entire playback system. Much of the success of the DAC1 and DAC2 converters can be attributed to the passive output attenuators. Musical details can be obscured by system noise whenever a preamplifier and power amplifier are improperly matched. The passive attenuators enable full use of your power amplifier's dynamic range.

Experience new details in your favorite recordings.

ULTRALOCK2™ JITTER ATTENUATION SYSTEM

UltraLock2™ is an improved version of the UltraLock™ system used in the DAC1 and ADC1 product families. DSP processing is 32-bits, DSP headroom is 3.5 dB, sample rate is 211 kHz, and jitter-induced distortion and noise is at least 140 dB below the level of the music - well below the threshold of hearing.

Benchmark's UltraLock2™ system eliminates all audible jitter artifacts.

HIGH-HEADROOM DSP

All D/A converters need 3.5 dB "excess" digital headroom, but few have any headroom above 0 dBFS.

All of the digital processing in the DAC2 DX is designed to handle signals as high as +3.5 dBFS. Most digital systems clip signals that exceed 0 dBFS. The 0 dBFS limitation seems reasonable, as 0 dBFS is the highest sinusoidal signal level that can be represented in a digital system. However, a detailed investigation of the mathematics of PCM digital systems will reveal that inter-sample peaks may reach levels slightly higher than +3 dBFS while individual samples never exceed 0 dBFS. These inter-sample overs are common in commercial releases, and are of no consequence in a PCM system until they reach an interpolation process. But, for a variety of reasons, virtually all audio D/A converters use an interpolation process. The interpolation process is absolutely necessary to achieve 24-bit state-of-the art conversion performance. Unfortunately, inter-sample overs cause clipping in most interpolators. This clipping produces distortion products that are non-harmonic and non-musical . We believe these broadband distortion products often add a harshness or false high-frequency sparkle to digital reproduction. The DAC2 DX avoids these problems by maintaining at least 3.5 dB of headroom in the entire conversion system.

We believe this added headroom is a groundbreaking improvement delivering significant sonic advantages.

QUAD 32-BIT BALANCED CONVERSION SYSTEM

Four balanced 32-bit D/A converters deliver audio to Benchmark's low-impedance current to voltage converters. The main bus feeds the balanced XLR outputs and one set of unbalanced RCA outputs. The main bus uses 3:1 redundancy to reduce conversion noise by 4.77 dB. The redundancy also tends to reduce distortion. A fourth set of conversion channels are reserved for the auxiliary bus that feeds the second set of RCA outputs.

Similar redundancy is built into the native DSD conversion system.

The analog circuits that follow the D/A converter are carefully designed. Benchmark has leveraged its long history of building high-end analog audio equipment, in order to create an outstanding analog output stage.

Digital converters are never better than the analog stages that support the conversion process.

MULTI-MODE ASYNCHRONOUS USB SYSTEM

Benchmark's USB system supports USB Audio 2.0, DSD, and USB Audio 1.1. It is frequency agile, and will follow sample rate changes initiated by the computer and/or the media playback software. In all modes the USB communications are asynchronous in order to eliminate unnecessary sources of jitter.

The DAC2 DX has a low-jitter master clock which controls the transfer of audio data from the computer to the USB sub-system. The computer asynchronously transfers audio data to a buffer in the DAC2 DX. The contents of the buffer are then asynchronously transferred to the D/A conversion sub-system. This second asynchronous transfer eliminates any traces of jitter that accumulate as the data is transferred between the USB and conversion subsystems. No traces of jitter-induced distortion are measurable to our measurement limits (better than -150 dBFS). This truly represents the state-of-the art. Enjoy the convenience of computer playback without compromise. The Asynchronous USB system supports USB Audio 2.0 for high-resolution 192kHz, and DSD playback. No drivers are required for MAC operating systems. An easy-to-install driver adds 192 kHz and DSD capabilities to Windows operating systems.

An asynchronous, driverless USB Audio 1.1 mode supports sample rates up to 96 kHz. This USB mode can be selected from the front panel or from the remote control. The driverless USB Audio 1.1 mode allows quick plug-and-play connections to Windows, MAC, iOS, and many Linux operating systems without installing drivers. Just plug in the USB, and the DAC2 DX becomes an available audio device.

The USB subsystem remains active when the DAC2 DX is powered down. This prevents interruptions to the computer playback operations and eliminates the need to reconfigure the computer every time the converter is turned on.

Enjoy the convenience of USB connectivity without any compromise to audio performance.

DIGITAL DIAGNOSTIC DISPLAY

Ever wonder why that 192 kHz 24-bit download on your computer just doesn't sound right? Your media player may be down-sampling to 44.1 kHz and/or truncating to 16-bits. Many media players apply poor-quality sample rate conversion and truncation. Fortunately these problems can be eliminated with the selection of a good frequency-agile media player. The sample-rate and word-length displays on the DAC2 DX confirm the proper operation of your media player. These tools are also essential in the studio - get instant confirmation of sample rates and word lengths. The DAC2 measures the sample rate and examines bit activity, it does not use metadata flags (which are often incorrect).

Know when High-Resolution Audio is being delivered to your DAC.

VOLUME-CONTROL BYPASS

The DAC2 DX has two analog output busses. Each bus can be placed in a volume-control bypass mode in order to provide a full-level output to a downstream analog volume control. This is useful in many professional applications and is also useful when the DAC2 DX is feeding a Hi-Fi preamplifier.

The bypass function should be enabled whenever a Hi-Fi preamplifier is inserted between the DAC2 DX and the power amplifier. However, for best performance, Benchmark strongly recommends connecting the DAC2 directly to the power amplifier. The DAC2 DX performs all the functions of a DAC and a Hi-Fi preamplifier - a separate downstream Hi-Fi preamplifier can only degrade the performance.

The Volume-Control Bypass provides flexibility for specialized applications.

DIGITAL PASS-THROUGH FUNCTION

The second coaxial input can be reconfigured as a digital output. In output mode, any selected digital input (including USB) will pass through to the coaxial output. The digital pass through is bit-transparent and even supports DSD (DoP 1.1). Dolby digital and DTS formats can be passed through to a surround processor.

The Pass-Through Function provides a coaxial output for any USB-connected computer.

POWER SWITCH

The DAC2 DX will enter a standby mode if the selected digital input is inactive for more than 5 minutes. Operation will resume when the selected digital input become active.The power switch places the DAC2 DX in "full shutdown". Power consumption is less than 0.5 W in "full shutdown". The DAC2 DX will respond the IR remote or the 12V trigger while in "full shutdown".

The DAC2 DX saves energy by meeting or exceeding all standby power standards.

LOW POWER CONSUMPTION

The DAC2 uses high-efficiency low noise power supplies and may be operated from any standard international voltage without adjustment. Low-noise audio circuits require generous amounts of power. High-efficiency circuits in the DAC2 deliver this power without wasted energy.

Power consumption is 12 W - typical.

DISTRIBUTED POWER REGULATION

To achieve the lowest possible noise, the DAC2 D uses distributed power supply regulation. Each critical subsystem has at least one dedicated low-noise voltage regulator.

This power system is so effective that there no evidence of any AC line-related hum or noise at the output of the DAC2 - to a measurement limit of -160 dB FS.

"ZERO-OHM" HPA2™ HEADPHONE POWER AMPLIFIER

The DAC2 features the HPA2™ - Benchmark's signature high-current, 0-Ohm headphone power amplifier. The HPA2™ is arguably the ultimate reference headphone power amplifier. It will deliver the full rated performance of the DAC2 to the headphones. The HPA2™ maintains less than 0.0003% THD+N under full load. The DAC2 has two 1/4" headphone jacks on the front panel. The performance of the HPA2™ remains consistent even when two headphones are being driven simultaneously.

The 0.11-Ohm output impedance of the HPA2™ maintains tight control of headphone transducers.

AUDIO PERFORMANCE

Fs = 44.1 to 96 kHz, 20 to 20 kHz BW, 1 kHz test tone, 0 dBFS = +24 dBu (unless noted)

SNR – A-Weighted, 0 dBFS = +24 dBu

126 dB

SNR – Unweighted, 0 dBFS = +24 dBu

123 dB

THD+N, 1 kHz at 0 dBFS

-109 dBFS, -109 dB, 0.00035%

THD+N, 1 kHz at -1 dBFS

-110 dBFS, -109 dB, 0.00035%

THD+N, 1 kHz at –3 dBFS

-113 dBFS, -109 dB, 0.00035%

THD+N, 20 to 20 kHz test tone at –3 dBFS

-112 dBFS, -108 dB, 0.00040%

Frequency Response at Fs=96 kHz

+0 dB, -0.04 dB (20 to 20 kHz)

-0.04 dB at 10 Hz

-0.04 dB at 20 kHz

-0.04 dB at 40 kHz

-0.7 dB at 45 kHz

Frequency Response at Fs=48 kHz

+0 dB, -0.04 dB (20 to 20 kHz)

-0.04 dB at 10 Hz

-0.04 dB at 20 kHz

Crosstalk

-116 dB at 20 kHz

-130 dB at 1 kHz

-137 dB at 20 Hz

Maximum Amplitude of Jitter Induced Sidebands (10 kHz 0 dBFS test tone, 12.75 UI sinusoidal jitter at 1 kHz)

< -144 dB

Maximum Amplitude of Spurious Tones with 0 dBFS test signal

< -138 dB

Maximum Amplitude of Idle Tones

< -147 dB

Maximum Amplitude of AC line related Hum & Noise

< -140 dB

Inter-channel Differential Phase (Stereo Pair – any sample rate)

+/- 0.25 degrees at 20 kHz

Inter-channel Differential Phase (Between DAC2 HGC Units Fs<110 kHz) Any sample rate.

+/- 0.25 degrees at 20 kHz

Maximum Lock Time after Fs change

400 ms

Soft Mute Ramp Up/Down Time

50 ms

Mute on Receive Error

Yes

Mute on Lock Error

Yes

Mute on Idle Channel

No

50/15 us De-Emphasis Enable

Automatic in Consumer Mode

De-Emphasis Method

Digital IIR

De-Emphasis Supported at

Fs = 32, 44.1, 48 kHz


GROUP DELAY (LATENCY)

Delay – Digital Input to Analog Output (function of sample rate)

1.36 ms at 44.1 kHz

1.27 ms at 48 kHz

0.90 ms at 88.2 kHz

0.82 ms at 96 kHz

0.51 ms at 176.4 kHz

0.47 ms at 192 kHz


DIGITAL AUDIO INPUTS

Number of Digital Inputs (switch selected)

6 (1 USB, 2 Optical, 1 AES, 2 Coaxial)

Number of Channels

2

Input Sample Frequency Range

28 to 210 kHz (Coaxial and XLR)

28 to 96 kHz (Optical)

44.1, 48, 88.2, 96, 176.4, 192 kHz (USB)

Maximum Input Word Length

24 bits

Digital Input Impedance

75 Ohms Coaxial, 110 Ohms XLR

DC Blocking Capacitors on Digital Inputs

Yes (Coaxial and XLR Inputs)

Transient and Over-Voltage Protection on Digital Inputs

Yes (Coaxial and XLR Inputs)

Transformer Coupling on Digital Inputs

Yes (XLR Input)

Minimum Digital Input Level

250 mVpp (Coaxial and XLR Inputs)

Jitter Tolerance

(With no Measurable Change in Performance)

>12.75 UI sine, 100 Hz to 3 kHz

>1.5 UI sine at 20 kHz

>1.5 UI sine at 40 kHz

>1.5 UI sine at 80 kHz

>1.5 UI sine at 90 kHz

>0.25 UI sine above 160 kHz

Jitter Attenuation Method

Benchmark UltraLock2™ - all inputs


BALANCED ANALOG OUTPUTS

Number of Balanced Analog Outputs

2

Output Connector

Gold-Pin Neutrik™ male XLR

Output Impedance

60 Ohms (Attenuator off)

425 Ohms (Attenuator = 10 dB)

135 Ohms (Attenuator = 20 dB)

Analog Output Clip Point

+30 dBu

Factory Set Bypass Level (at 0 dBFS)

+24 dBu (Attenuator = 0 dB)

Output Level Range (at 0 dBFS) In ‘Variable’ Mode

Off to +24 dBu (Attenuator off)

Off to +14 dBu (Attenuator = 10 dB)

Off to +4 dBu (Attenuator = 20 dB)

Output Level Variation with Sample Rate (44.1 kHz vs. 96 kHz)

< +/- 0.006 dB


UNBALANCED ANALOG OUTPUTS

Number of Unbalanced Analog Outputs

4

Output Connector

RCA

Output Impedance

30 Ohms

Analog Output Clip Point

+13.5 dBu

Factory Set Home Theater Bypass Output Level (at 0 dBFS)

+8.2 dBu (2 Vrms)

Output Level Range (at 0 dBFS)

Off to +8.2 dBu

Output Level Variation with Sample Rate (44.1 kHz vs. 96 kHz)

< +/- 0.006 dB


HPA2TM HEADPHONE OUTPUTS

Number of Headphone Outputs

2

Output Connectors

¼” TRS with switch on left-hand jack

Output Impedance

< 0.11 Ohms

Output Level Control

Stereo Control on Front Panel

Output Level Range (at 0 dBFS) into 60-Ohm Load

Off to +17 dBu

Maximum Output Current

250 mA

Overload Protection (independent per channel)

Current limited at 300 mA, Thermal

Bandwidth

> 500 kHz

THD+N

-106 dB, 0.0005% into 30 Ohms at +18 dBu (1.26W)


STATUS DISPLAY

Indicators - Type and Location

16 LED’s on Front Panel

Selection/Status Indication

2 – Dim/Mute
6 – Input
2 – Bypass/Calibrated Output
2 – Word length
4 – Sample Rate




AC POWER REQUIREMENTS

Nominal Input Operating Voltage Range (VAC RMS)

100 – 240V

Frequency

50-60 Hz

Power

< 0.5 Watts Idle
12 Watts Typical Program
15 Watts Maximum

Fuses

5 x 20 mm (2 required)
0.5 A 250 V Slo-Blo® Type

Min/Max Operating range (VAC RMS)

90 – 260
47 – 63Hz


DIMENSIONS

Form Factor

½ Rack Wide, 1 RU High

Depth behind front panel

8.5” (216 mm)

Overall depth including connectors but without power cord

9.33” (237 mm)

Width

9.5” (249 mm)

Height

1.725” (44.5 mm)


WEIGHT

DAC2 only

3 lb.

DAC2 with remote control, power cord, extra fuses, and manual

4 lb.

Shipping weight

7 lb.


DAC2 DX FEATURES

  • Sample-Rate Display
  • Word-Length Display
  • Six Digital Inputs
  • Three Stereo Analog Outputs
  • Two Independent Analog Output Buses
  • Digital Pass Through
  • Dual HPA2™ Headphone Outputs
  • Headphone Mute Switch - left headphone jack mutes main output, function may be defeated
  • Native DSD Conversion
  • Native PCM Conversion
  • Asynchronous USB 2.0
  • Asynchronous USB 1.1 for Driverless Operation
  • Volume Control Bypass Function for Main Bus
  • Volume Control Bypass Function for Auxiliary Bus
  • 12V Trigger I/O - for sequenced system power switching
  • Mute Relays - on all analog outputs
  • Optional IR Remote Control - with heavy-duty metal housing
  • Power Switch
  • Low Power Consumption

RACK-MOUNT OPTIONS

The DAC2 DX is available in rackmount chassis. Non-rackmount versions can also be rackmounted using Benchmark's 1-RU tray. All Benchmark DAC2, DAC1, ADC1, and MPA1 products are housed in a 1/2-wide 1 RU chassis. Two units can be mounted side-by-side in a standard 19" rack. The rackmount version of the DAC2 DX is 1/2 rack wide and requires a blank plate and coupler if mounted by itself.

BENCHMARK DAC2 DX - DIGITAL TO ANALOG AUDIO CONVERTER
฿73,800
BENCHMARK PERFORMANCE The DAC2 DX is Benchmark's newest 2-channel D/A converter. When compared to the legendary DAC1, the DAC2 has lower noise, lower distortion, and improved accuracy. The DAC1 ..
฿73,800

Available Options

BENCHMARK DAC2 HGC - DIGITAL TO ANALOG AUDIO CONVERTER

xxx แบรนด์: BENCHMARK

รหัสสินค้า: BENCHMARK DAC2 HGC - DIGITAL TO ANALOG AUDIO CONVERTER

฿78,000

A NEW REFERENCE - GOING BEYOND THE LEGENDARY DAC1

Benchmark's DAC1 family of D/A converters have been the reference to which other converters have been compared. It is rare to find a converter review that does not draw comparisons to the DAC1. The DAC1 has been the best-selling 2-channel reference-quality converter and is in daily use at many of the finest recording studios and mastering rooms. DAC1 converters are also enjoyed by thousands of audiophiles. Benchmark has raised the bar ... the DAC2 defines a new reference.

REFERENCE PERFORMANCE

The DAC2 is Benchmark's second-generation 2-channel D/A converter. The DAC2 converter has lower noise and lower distortion than Benchmark's DAC1 converter.The performance of the DAC2 exceeds the measurement limits of some of today's best test equipment.

The DAC2 delivers outstanding musical detail and precise stereo imaging. It employs an advanced high-headroom digital filter design, and a new high-sample-rate Asynchronous USB Audio interface. All inputs are fully isolated from interface jitter by Benchmark's new UltraLock2™ jitter attenuation system.

Internal digital processing and conversion is 32-bits, and this processing includes 3.5 dB of headroom above 0 dBFS. This headroom prevents the DSP overloads that commonly occur in other D/A converters.

Four balanced 32-bit D/A converter are summed together to create each balanced analog output. This 4:1 summation provides a 6 dB noise reduction, and gives the DAC2 industry-leading performance.

NATIVE DSD CONVERSION

All digital inputs on the DAC2 support native PCM or DSD conversion. From any input, DSD is transported with bit accuracy over DoP 1.1. DSD and PCM are both natively converted to analog. There are no DSD to PCM or PCM to DSD conversions to compromise the quality of the music. The DAC2 conversion system seamlessly switches between native PCM and native DSD conversion. DSD over DoP 1.1 is supported by many media players, and DSD downloads are now available from several sources.

DIRECT CONNECTIVITY TO POWER AMPLIFIERS

Benchmark DAC1 and DAC2 converters are designed to directly drive power amplifiers and speakers. Benchmark converters feature adjustable low-impedance passive attenuators at the XLR outputs that can be used to optimize the interface to the power amplifier (or powered monitor). This unique Benchmark feature optimizes the gain staging between the DAC and the power amplifier. Proper gain staging cannot be overemphasised. When audio stages are properly matched, each component in the audio chain is able to operate at its optimum signal level, and the system performance is significantly improved.

SONICALLY-NEUTRAL STUDIO MONITORING

All Benchmark converters are designed for maximum transparency. This transparency is absolutely essential in the studio monitoring chain. For this reason, DAC2 converters are ideal for critical reference-quality professional systems. Unlike many competing products, the DAC2 is not designed to add "euphonic" coloration to the audio. Instead it is designed to be as uncolored and natural as possible.

STEP INTO THE STUDIO

When Benchmark's professional converters are used in hi-fi applications, studio-quality sound can be enjoyed in a home environment. Enjoy pure music without any coloration from the electronics. Hear the music exactly the way it was heard in the studio, and exactly the way the artists intended.

Discover the natural, uncolored, analog sound of the DAC2.

SIT IN THE PERFORMANCE SPACE

Transparent sound can go beyond replicating the studio experience. Recordings that have been produced with a natural and unprocessed sound can transport you to the performance space. But, this can only happen when the entire playback chain is selected for maximum transparency.

This experience of "being there" cannot be created by systems that are designed to add "warmth" or "euphonic color" to the music. 

NEW TECHNOLOGIES

  • Hybrid Gain Control
  • High-Headroom DSP
  • UltraLock2™ Jitter Attenuation System
  • Quad 32-bit balanced D/A Conversion System
  • Multi-Mode Asynchronous USB Audio System
  • Distributed Power Regulation

HYBRID GAIN CONTROL

"HGC" is Benchmark's unique Hybrid Gain Control system. The DAC2 combines active analog gain control, passive low-impedance attenuators, a 32-bit digital gain control, and a servo-driven volume control. All inputs are controlled by the rotary volume control. This volume control moves in response to commands from the remote control. Analog inputs are never converted to digital, and digital inputs never pass through an analog potentiometer. Digital inputs are precisely controlled in the 32-bit DSP system. The DSP system preserves precise L/R balance, and precise stereo imaging, while avoiding any source of noise and distortion.

Benchmark's unique passive output attenuators provide distortion-free gain reduction without reducing the dynamic range of the converter. The attenuators optimize the gain staging between the DAC2 and the power amplifier. This optimization is absolutely essential for maximizing the dynamic range of the entire playback system. Much of the success of the DAC1 converters can be attributed to the passive output attenuators. Musical details can be obscured by system noise whenever a preamplifier and power amplifier are improperly matched. The" HGC " system will make full use of your power amplifier's dynamic range. Experience new details in your favorite recordings.

ULTRALOCK2™ JITTER ATTENUATION SYSTEM

UltraLock2™ is an improved version of the UltraLock™ system used in the DAC1 and ADC1 product families. DSP processing is 32-bits, DSP headroom is 3.5 dB, sample rate is 211 kHz, and jitter-induced distortion and noise is at least 140 dB below the level of the music - well below the threshold of hearing. Benchmark's UltraLock2™ system eliminates all audible jitter artifacts.

HIGH HEADROOM DSP - WITH 3.5 DB "EXCESS" DIGITAL HEADROOM

All of the digital processing in the DAC2 is designed to handle signals as high as +3.5 dBFS. Most digital systems clip signals that exceed 0 dBFS. The 0 dBFS limitation seems reasonable, as 0 dBFS is the highest sinusoidal signal level that can be represented in a digital system. However, a detailed investigation of the mathematics of PCM digital systems will reveal that inter-sample peaks may reach levels slightly higher than +3 dBFS while individual samples never exceed 0 dBFS. These inter-sample overs are common in commercial releases, and are of no consequence in a PCM system until they reach an interpolation process. But, for a variety of reasons, virtually all audio D/A converters use an interpolation process. The interpolation process is absolutely necessary to achieve 24-bit state-of-the art conversion performance. Unfortunately, inter-sample overs cause clipping in most interpolators. This clipping produces distortion products that are non-harmonic and non-musical . We believe these broadband distortion products often add a harshness or false high-frequency sparkle to digital reproduction. The DAC2 avoids these problems by maintaining at least 3.5 dB of headroom in the entire conversion system. We believe this added headroom is a groundbreaking improvement.

MULTI-MODE ASYNCHRONOUS USB SYSTEM

Benchmark's USB system supports USB Audio 2.0, DSD, and USB Audio 1.1. It is frequency agile, and will follow sample rate changes initiated by the computer and/or the media playback software. In all modes the USB communications are asynchronous in order to eliminate unnecessary sources of jitter.

The DAC2 has a low-jitter master clock which controls the transfer of audio data from the computer to the USB sub-system. The computer asynchronously transfers audio data to a buffer in the DAC2. The contents of the buffer are then asynchronously transferred to the D/A conversion sub-system. This second asynchronous transfer eliminates any traces of jitter that accumulate as the data is transferred between the USB and conversion subsystems. No traces of jitter-induced distortion are measurable to our measurement limits (better than -150 dBFS). This truly represents the state-of-the art. Enjoy the convenience of computer playback without compromise. The Asynchronous USB system supports USB Audio 2.0 for high-resolution 192kHz, and DSD playback. No drivers are required for MAC operating systems. An easy-to-install driver adds 192 kHz and DSD capabilities to Windows operating systems.

An asynchronous, driverless USB Audio 1.1 mode supports sample rates up to 96 kHz. This USB mode can be selected from the front panel or from the remote control. The driverless USB Audio 1.1 mode allows quick plug-and-play connections to Windows, MAC, iOS, and Linux operating systems without installing drivers. Just plug in the USB, and the DAC2 becomes an available audio device.

The USB subsystem remains active when the DAC2 is powered down. This prevents interruptions to the computer playback operations and eliminates the need to reconfigure the computer every time the converter is turned on.

QUAD 32-BIT BALANCED CONVERSION SYSTEM

Four balanced 32-bit D/A converters deliver audio to Benchmark's low-impedance current to voltage converters. The 4:1 redundancy reduces noise and distortion to levels that set new benchmarks. The conversion system at the core of the DAC2 is as good as it gets. The analog circuits that follow the D/A converter are carefully designed. Benchmark has leveraged its long history of building high-end analog audio equipment, in order to create an outstanding output stage.

DIAGNOSTIC TOOLS - SAMPLE-RATE AND WORD-LENGTH INDICATORS

Ever wonder why that 192 kHz 24-bit download on your computer just doesn't sound right? Your media player may be down-sampling to 44.1 kHz and/or truncating to 16-bits. Many computers and media players apply poor-quality sample rate conversion and truncation. Fortunately these problems can be eliminated with the selection a good frequency-agile media player. The sample-rate and word-length displays on the DAC2 confirm the proper operation of your media player.

POLARITY SWITCH

You may encounter recordings with inverted polarity. The DAC2 HGC and DAC2 L include a polarity switch to correct the problem.

HOME THEATER BYPASS

The DAC2 can be integrated into a home theater system. Typically the DAC2 drives the left and right power amplifiers, and an analog feed from the home theater system is connected to either of the analog inputs on the DAC2. A programmable Home Theater Bypass function sets the pass-through gain to unity when the surround system is active. The DAC2 HGC and DAC2 L include an indicator light that is illuminated when bypass is active.

DIGITAL PASS THROUGH

The second coaxial input on the DAC2 can be reconfigured as a digital output. In output mode, any selected digital input (including USB) will pass through to the coaxial output. The digital pass through is bit-transparent and even supports DSD (DoP 1.1). Dolby digital and DTS formats can also be passed through to a surround processor.

BI-DIRECTIONAL 12 VOLT TRIGGER

Benchmark re-invents the 12 volt trigger. The trigger connection on the DAC2 can be used as an input, an output, or both. It is compatible with any common 12 volt trigger input or output. The trigger can be used to turn a power amplifier on or off automatically. The DAC2 will also respond to a 12 volt trigger to follow the actions of another audio component.

POWER SWITCH

The power switch can place the DAC2 in standby, or full shut down. In full shut down, the unit will still respond to the trigger input and the IR remote control. Power consumption is less than 0.5 W in full shut down.

LOW POWER CONSUMPTION

The DAC2 uses high-efficiency low noise power supplies and may be operated from any standard international voltage without adjustment. Power consumption is 12 W typical.

DISTRIBUTED POWER REGULATION

To achieve the lowest possible noise, the DAC2 HGC uses distributed power supply regulation. Each critical subsystem has at least one dedicated low-noise voltage regulator.

HPA2™ HEADPHONE POWER AMPLIFIER

The DAC2 features the HPA2™ - Benchmark's signature high-current, 0-Ohm headphone power amplifier. The HPA2™ is arguably the ultimate reference headphone power amplifier. It will deliver the full rated performance of the DAC2 to the headphones. The HPA2™ maintains less than 0.0003% THD+N under full load. The DAC2 has two 1/4" headphone jacks on the front panel. The performance of the HPA2™ remains consistent even when two headphones are being driven simultaneously.

NEW TECHNOLOGIES

  • Hybrid Gain Control
  • High-Headroom DSP
  • UltraLock2™ Jitter Attenuation System
  • Quad 32-bit balanced D/A Conversion System
  • Multi-Mode Asynchronous USB Audio System
  • Distributed Power Regulation

HYBRID GAIN CONTROL

"HGC" is Benchmark's unique Hybrid Gain Control system. The DAC2 combines active analog gain control, passive low-impedance attenuators, a 32-bit digital gain control, and a servo-driven volume control. All inputs are controlled by the rotary volume control. This volume control moves in response to commands from the remote control. Analog inputs are never converted to digital, and digital inputs never pass through an analog potentiometer. Digital inputs are precisely controlled in the 32-bit DSP system. The DSP system preserves precise L/R balance, and precise stereo imaging, while avoiding any source of noise and distortion.

Benchmark's unique passive output attenuators provide distortion-free gain reduction without reducing the dynamic range of the converter. The attenuators optimize the gain staging between the DAC2 and the power amplifier. This optimization is absolutely essential for maximizing the dynamic range of the entire playback system. Much of the success of the DAC1 converters can be attributed to the passive output attenuators. Musical details can be obscured by system noise whenever a preamplifier and power amplifier are improperly matched. The" HGC " system will make full use of your power amplifier's dynamic range. Experience new details in your favorite recordings.

ULTRALOCK2™ JITTER ATTENUATION SYSTEM

UltraLock2™ is an improved version of the UltraLock™ system used in the DAC1 and ADC1 product families. DSP processing is 32-bits, DSP headroom is 3.5 dB, sample rate is 211 kHz, and jitter-induced distortion and noise is at least 140 dB below the level of the music - well below the threshold of hearing. Benchmark's UltraLock2™ system eliminates all audible jitter artifacts.

HIGH HEADROOM DSP - WITH 3.5 DB "EXCESS" DIGITAL HEADROOM

All of the digital processing in the DAC2 is designed to handle signals as high as +3.5 dBFS. Most digital systems clip signals that exceed 0 dBFS. The 0 dBFS limitation seems reasonable, as 0 dBFS is the highest sinusoidal signal level that can be represented in a digital system. However, a detailed investigation of the mathematics of PCM digital systems will reveal that inter-sample peaks may reach levels slightly higher than +3 dBFS while individual samples never exceed 0 dBFS. These inter-sample overs are common in commercial releases, and are of no consequence in a PCM system until they reach an interpolation process. But, for a variety of reasons, virtually all audio D/A converters use an interpolation process. The interpolation process is absolutely necessary to achieve 24-bit state-of-the art conversion performance. Unfortunately, inter-sample overs cause clipping in most interpolators. This clipping produces distortion products that are non-harmonic and non-musical . We believe these broadband distortion products often add a harshness or false high-frequency sparkle to digital reproduction. The DAC2 avoids these problems by maintaining at least 3.5 dB of headroom in the entire conversion system. We believe this added headroom is a groundbreaking improvement.

MULTI-MODE ASYNCHRONOUS USB SYSTEM

Benchmark's USB system supports USB Audio 2.0, DSD, and USB Audio 1.1. It is frequency agile, and will follow sample rate changes initiated by the computer and/or the media playback software. In all modes the USB communications are asynchronous in order to eliminate unnecessary sources of jitter.

The DAC2 has a low-jitter master clock which controls the transfer of audio data from the computer to the USB sub-system. The computer asynchronously transfers audio data to a buffer in the DAC2. The contents of the buffer are then asynchronously transferred to the D/A conversion sub-system. This second asynchronous transfer eliminates any traces of jitter that accumulate as the data is transferred between the USB and conversion subsystems. No traces of jitter-induced distortion are measurable to our measurement limits (better than -150 dBFS). This truly represents the state-of-the art. Enjoy the convenience of computer playback without compromise. The Asynchronous USB system supports USB Audio 2.0 for high-resolution 192kHz, and DSD playback. No drivers are required for MAC operating systems. An easy-to-install driver adds 192 kHz and DSD capabilities to Windows operating systems.

An asynchronous, driverless USB Audio 1.1 mode supports sample rates up to 96 kHz. This USB mode can be selected from the front panel or from the remote control. The driverless USB Audio 1.1 mode allows quick plug-and-play connections to Windows, MAC, iOS, and Linux operating systems without installing drivers. Just plug in the USB, and the DAC2 becomes an available audio device.

The USB subsystem remains active when the DAC2 is powered down. This prevents interruptions to the computer playback operations and eliminates the need to reconfigure the computer every time the converter is turned on.

QUAD 32-BIT BALANCED CONVERSION SYSTEM

Four balanced 32-bit D/A converters deliver audio to Benchmark's low-impedance current to voltage converters. The 4:1 redundancy reduces noise and distortion to levels that set new benchmarks. The conversion system at the core of the DAC2 is as good as it gets. The analog circuits that follow the D/A converter are carefully designed. Benchmark has leveraged its long history of building high-end analog audio equipment, in order to create an outstanding output stage.

DIAGNOSTIC TOOLS - SAMPLE-RATE AND WORD-LENGTH INDICATORS

Ever wonder why that 192 kHz 24-bit download on your computer just doesn't sound right? Your media player may be down-sampling to 44.1 kHz and/or truncating to 16-bits. Many computers and media players apply poor-quality sample rate conversion and truncation. Fortunately these problems can be eliminated with the selection a good frequency-agile media player. The sample-rate and word-length displays on the DAC2 confirm the proper operation of your media player.

POLARITY SWITCH

You may encounter recordings with inverted polarity. The DAC2 HGC and DAC2 L include a polarity switch to correct the problem.

HOME THEATER BYPASS

The DAC2 can be integrated into a home theater system. Typically the DAC2 drives the left and right power amplifiers, and an analog feed from the home theater system is connected to either of the analog inputs on the DAC2. A programmable Home Theater Bypass function sets the pass-through gain to unity when the surround system is active. The DAC2 HGC and DAC2 L include an indicator light that is illuminated when bypass is active.

DIGITAL PASS THROUGH

The second coaxial input on the DAC2 can be reconfigured as a digital output. In output mode, any selected digital input (including USB) will pass through to the coaxial output. The digital pass through is bit-transparent and even supports DSD (DoP 1.1). Dolby digital and DTS formats can also be passed through to a surround processor.

BI-DIRECTIONAL 12 VOLT TRIGGER

Benchmark re-invents the 12 volt trigger. The trigger connection on the DAC2 can be used as an input, an output, or both. It is compatible with any common 12 volt trigger input or output. The trigger can be used to turn a power amplifier on or off automatically. The DAC2 will also respond to a 12 volt trigger to follow the actions of another audio component.

POWER SWITCH

The power switch can place the DAC2 in standby, or full shut down. In full shut down, the unit will still respond to the trigger input and the IR remote control. Power consumption is less than 0.5 W in full shut down.

LOW POWER CONSUMPTION

The DAC2 uses high-efficiency low noise power supplies and may be operated from any standard international voltage without adjustment. Power consumption is 12 W typical.

DISTRIBUTED POWER REGULATION

To achieve the lowest possible noise, the DAC2 HGC uses distributed power supply regulation. Each critical subsystem has at least one dedicated low-noise voltage regulator.

HPA2™ HEADPHONE POWER AMPLIFIER

The DAC2 features the HPA2™ - Benchmark's signature high-current, 0-Ohm headphone power amplifier. The HPA2™ is arguably the ultimate reference headphone power amplifier. It will deliver the full rated performance of the DAC2 to the headphones. The HPA2™ maintains less than 0.0003% THD+N under full load. The DAC2 has two 1/4" headphone jacks on the front panel. The performance of the HPA2™ remains consistent even when two headphones are being driven simultaneously.

AUDIO PERFORMANCE

Fs = 44.1 to 96 kHz, 20 to 20 kHz BW, 1 kHz test tone, 0 dBFS = +24 dBu (unless noted)

SNR – A-Weighted, 0 dBFS = +24 dBu

126 dB

SNR – Unweighted, 0 dBFS = +24 dBu

123 dB

THD+N, 1 kHz at 0 dBFS

-109 dBFS, -109 dB, 0.00035%

THD+N, 1 kHz at -1 dBFS

-110 dBFS, -109 dB, 0.00035%

THD+N, 1 kHz at –3 dBFS

-113 dBFS, -109 dB, 0.00035%

THD+N, 20 to 20 kHz test tone at –3 dBFS

-112 dBFS, -108 dB, 0.00040%

Frequency Response at Fs=96 kHz

+0 dB, -0.04 dB (20 to 20 kHz)

-0.04 dB at 10 Hz

-0.04 dB at 20 kHz

-0.04 dB at 40 kHz

-0.7 dB at 45 kHz

Frequency Response at Fs=48 kHz

+0 dB, -0.04 dB (20 to 20 kHz)

-0.04 dB at 10 Hz

-0.04 dB at 20 kHz

Crosstalk

-137 dB at 20 Hz

-130 dB at 1 kHz

-116 dB at 20 kHz

Maximum Amplitude of Jitter Induced Sidebands (10 kHz 0 dBFS test tone, 12.75 UI sinusoidal jitter at 1 kHz)

< -144 dB

Maximum Amplitude of Spurious Tones with 0 dBFS test signal

< -138 dB

Maximum Amplitude of Idle Tones

< -147 dB

Maximum Amplitude of AC line related Hum & Noise

< -140 dB

Inter-channel Differential Phase (Stereo Pair – any sample rate)

+/- 0.25 degrees at 20 kHz

Inter-channel Differential Phase (Between DAC2 Units Fs<110 kHz) Any sample rate.

+/- 0.25 degrees at 20 kHz

Maximum Lock Time after Fs change

400 ms

Soft Mute Ramp Up/Down Time

50 ms

Mute on Receive Error

Yes

Mute on Lock Error

Yes

Mute on Idle Channel

No

50/15 us De-Emphasis Enable

Automatic in Consumer Mode

De-Emphasis Method

Digital IIR

De-Emphasis Supported at

Fs = 32, 44.1, 48 kHz

GROUP DELAY (LATENCY)

Delay – Digital Input to Analog Output (function of sample rate)

1.36 ms at 44.1 kHz

1.27 ms at 48 kHz

0.90 ms at 88.2 kHz

0.82 ms at 96 kHz

0.51 ms at 176.4 kHz

0.47 ms at 192 kHz

DIGITAL AUDIO INPUTS

Number of Digital Inputs (switch selected)

5 (1 USB, 2 Optical, 2 Coaxial)

Number of Channels

2

Input Sample Frequency Range

28 to 210 kHz (Coaxial Inputs)

28 to 96 kHz (Optical Inputs)

44.1, 48, 88.2, 96, 176.4, 192 kHz (USB Input)

Maximum Input Word Length

24 bits

Digital Input Impedance

75 Ohms (Coaxial Inputs)

DC Blocking Capacitors on Digital Inputs

Yes (Coaxial Inputs)

Transient and Over-Voltage Protection on Digital Inputs

Yes (Coaxial Inputs)

Minimum Digital Input Level

250 mVpp (Coaxial Inputs)

Jitter Tolerance

(With no Measurable Change in Performance)

>12.75 UI sine, 100 Hz to 3 kHz

>1.5 UI sine at 20 kHz

>1.5 UI sine at 40 kHz

>1.5 UI sine at 80 kHz

>1.5 UI sine at 90 kHz

>0.25 UI sine above 160 kHz

Jitter Attenuation Method

Benchmark UltraLock2™ - all inputs

BALANCED ANALOG OUTPUTS

Number of Balanced Analog Outputs

2

Output Connector

Gold-Pin Neutrik™ male XLR

Output Impedance

60 Ohms (Attenuator off)

425 Ohms (Attenuator = 10 dB)

135 Ohms (Attenuator = 20 dB)

Analog Output Clip Point

+30 dBu

Factory Set Bypass Level (at 0 dBFS)

+23 dBu (Attenuator = 0 dB)

Output Level Range (at 0 dBFS) In ‘Variable’ Mode

Off to +23 dBu (Attenuator off)

Off to +13 dBu (Attenuator = 10 dB)

Off to +3 dBu (Attenuator = 20 dB)

Output Level Variation with Sample Rate (44.1 kHz vs. 96 kHz)

< +/- 0.006 dB

UNBALANCED ANALOG OUTPUTS

Number of Unbalanced Analog Outputs

4

Output Connector

RCA

Output Impedance

30 Ohms

Analog Output Clip Point

+13.5 dBu

Factory Set Home Theater Bypass Output Level (at 0 dBFS)

+8.2 dBu (2 Vrms)

Output Level Range (at 0 dBFS)

Off to +8.2 dBu

Output Level Variation with Sample Rate (44.1 kHz vs. 96 kHz)

< +/- 0.006 dB

HPA2TM HEADPHONE OUTPUTS

Number of Headphone Outputs

2

Output Connectors

¼” TRS with switch on left-hand jack

Output Impedance

< 0.11 Ohms

Output Level Control

Stereo Control on Front Panel

Output Level Range (at 0 dBFS) into 60-Ohm Load

Off to +17 dBu

Maximum Output Current

250 mA

Overload Protection (independent per channel)

Current limited at 300 mA, Thermal

Bandwidth

> 500 kHz

THD+N

-106 dB, 0.0005% into 30 Ohms at +18 dBu (1.26W)

STATUS DISPLAY

Indicators - Type and Location

16 LED’s on Front Panel

Selection/Status Indication

1 – Dim/Mute

1 - Polarity
6 – Input
2 – Bypass/Calibrated Output
2 – Word length
4 – Sample Rate



AC POWER REQUIREMENTS

Nominal Input Operating Voltage Range (VAC RMS)

100 – 240V

Frequency

50-60 Hz

Power

< 0.5 Watts Idle
12 Watts Typical Program
15 Watts Maximum

Fuses

5 x 20 mm (2 required)
0.5 A 250 V Slo-Blo® Type

Min/Max Operating range (VAC RMS)

90 – 260
47 – 63Hz

DIMENSIONS

Form Factor

½ Rack Wide, 1 RU High

Depth behind front panel

8.5” (216 mm)

Overall depth including connectors but without power cord

9.33” (237 mm)

Width

9.5” (249 mm)

Height

1.725” (44.5 mm)

WEIGHT

DAC2 only

3 lb.

DAC2 with remote control, power cord, extra fuses, and manual

4 lb.

Shipping weight

7 lb.

NEW FEATURES

DAC1 customers requested many new features which have been integrated into the new DAC2 HGC:

  • Sample Rate Display
  • Word Length Display
  • More Digital Inputs (5 total)
  • More Analog Inputs (2 total)
  • More Analog Outputs (3 total)
  • Digital Pass Through
  • Native DSD Conversion
  • Polarity Switch
  • Asynchronous USB 2.0
  • Driverless Asynchronous USB 1.1
  • Home Theater Bypass
  • Bi-Directional 12 Volt Trigger
  • Power Switch
  • Low Power Consumption
  • New Benchmark Technologies

BENCHMARK DAC2 HGC - DIGITAL TO ANALOG AUDIO CONVERTER
฿78,000
A NEW REFERENCE - GOING BEYOND THE LEGENDARY DAC1 Benchmark's DAC1 family of D/A converters have been the reference to which other converters have been compared. It is rare to find a converter r..
฿78,000

Available Options

BENCHMARK DAC3 B - DIGITAL TO ANALOG AUDIO CONVERTER

xxx แบรนด์: BENCHMARK

รหัสสินค้า: BENCHMARK DAC3 B - DIGITAL TO ANALOG AUDIO CONVERTER

฿66,300
  • DAC3 B - REFERENCE QUALITY - BASIC FEATURES

    The DAC3 B is the basic D/A converter in Benchmark's DAC3 converter series. The DAC3 B is the ideal converter to use in front of Benchmark's HPA4headphone amplifier or LA4 line amplifier. It is also ideal for many professional studio applications. It delivers the full performance of the flagship DAC3 HGC, but eliminates the volume control, the analog inputs, the mute and polarity controls, and the headphone amplifier.

    To make system integration easy, the DAC3 B retains IR remote control (handset optional), 12 V trigger, and the programmable auto-on feature. The DAC3 Badds a control-lock feature that turns off the remote control and locks the keypad to prevent tampering and accidental changes. The optional 1/2-width rack-mount faceplate allows the mounting of two units in a single 1-RU rack space.

  • The DAC3 B sounds exactly like the DAC3 HGC because it uses the exact same circuit board and the exact same audio path. Benchmark has simply eliminated the unnecessary parts to deliver a stripped down race car of a converter. If you want a basic D/A converter that delivers the finest conversion available, the DAC3 B is for you. 

  • The DAC3 B is a 2-channel D/A converter featuring the new ESS Technologies ES9028PRO converter chip. The DAC3 converter has lower THD and THD+N noise than Benchmark's DAC2 converters.

  • Benchmark's DAC1 and DAC2 D/A converter families have been the reference to which other converters have been compared. It is rare to find a converter review that does not draw comparisons to the DAC1 or the DAC2. Benchmark converters are in daily use at many of the world's finest recording studios and mastering rooms. Benchmark converters are also enjoyed by thousands of audiophiles. Benchmark has raised the bar again ... the DAC3 defines a new reference.

    REFERENCE PERFORMANCE

    The DAC3 delivers outstanding musical detail and precise stereo imaging. It employs an advanced high-headroom digital filter design, and a high-sample-rate Asynchronous USB Audio interface. All inputs are fully isolated from interface jitter by Benchmark's new UltraLock3™ jitter attenuation system.

    Internal digital processing and conversion is 32-bits, and this processing includes 3.5 dB of headroom above 0 dBFS. This headroom prevents the DSP overloads that commonly occur in other D/A converters.

    Four balanced 32-bit D/A converters are summed together to create each balanced analog output. This 4:1 summation provides a 6 dB noise reduction, and gives the DAC3 industry-leading performance.

    DAC3 VS. DAC2

    The DAC3builds upon Benchmark’s highly successful DAC2 product family. The DAC3 maintains the familiar DAC2 form factor and feature set, but adds the higher performance available from the new ES9028PRO D/A converter. The DAC3 offers the following improvements over the DAC2:

    • Active 2nd Harmonic Compensation
    • Active 3rd Harmonic Compensation
    • Lower THD+N
    • Lower passband ripple
    • Improved frequency response
    • Faster PLL lock times
    • Faster switching between input signals

    DAC3 VS. DAC1

    The DAC3 and DAC2 added these features that were not found on the DAC1:

    • Asynchronous 192kHz USB Audio 2.0
    • 32-bit D/A conversion system
    • Word Length Display
    • Sample Rate Display
    • Direct DSD D/A Conversion
    • Bi-Directional 12V Trigger
    • Power Switch with Auto-On Function
    • Digital Pass-Through
    • High-Headroom DSP
    • Additional I/O

    NATIVE DSD CONVERSION

    All digital inputs on the DAC3 support native PCM or DSD conversion. From any input, DSD is transported with bit accuracy over DoP 1.1. DSD and PCM are both natively converted to analog. There are no DSD to PCM or PCM to DSD conversions to compromise the quality of the music. The DAC3 conversion system seamlessly switches between native PCM and native DSD conversion. DSD over DoP 1.1 is supported by many media players, and DSD downloads are now available from several sources.

    DIRECT CONNECTIVITY TO POWER AMPLIFIERS

    Benchmark DAC1DAC2, and DAC3 converters are designed to directly drive power amplifiers and speakers. Benchmark converters feature adjustable low-impedance passive attenuators at the XLR outputs that can be used to optimize the interface to the power amplifier (or powered monitor). This unique Benchmark feature optimizes the gain staging between the DAC and the power amplifier. Proper gain staging cannot be overemphasised. When audio stages are properly matched, each component in the audio chain is able to operate at its optimum signal level, and the system performance is significantly improved.

    SONICALLY-NEUTRAL STUDIO MONITORING

    All Benchmark converters are designed for maximum transparency. This transparency is absolutely essential in the studio monitoring chain. For this reason, DAC3 converters are ideal for critical reference-quality professional systems. Unlike many competing products, the DAC3 is not designed to add "euphonic" coloration to the audio. Instead it is designed to be as uncolored and natural as possible.

    STEP INTO THE STUDIO

    When Benchmark's professional converters are used in hi-fi applications, studio-quality sound can be enjoyed in a home environment. Enjoy pure music without any coloration from the electronics. Hear the music exactly the way it was heard in the studio, and exactly the way the artists intended.

    Discover the natural, uncolored, analog sound of the DAC3.

    SIT IN THE PERFORMANCE SPACE

    Transparent sound can go beyond replicating the studio experience. Recordings that have been produced with a natural and unprocessed sound can transport you to the performance space. But, this can only happen when the entire playback chain is selected for maximum transparency.

    This experience of "being there" cannot be created by systems that are designed to add "warmth" or "euphonic color" to the music. 

DAC3 TECHNOLOGIES

  • Harmonic Compensation
  • UltraLock3™ Jitter Attenuation System
  • High-Headroom DSP
  • Multi-Mode Asynchronous USB Audio System
  • Quad 32-bit balanced D/A Conversion System
  • Distributed Power Regulation

HARMONIC COMPENSATION

The ES9028PRO has two distortion compensation systems that independently remove most of the 2nd and 3rd harmonic distortion in the D/A converter. Benchmark's ultra-clean analog output stages allow these systems to be fully leveraged in the DAC3. To the best of our knowledge, no other D/A converter has lower THD than the Benchmark DAC3.

ULTRALOCK3™ JITTER ATTENUATION SYSTEM

UltraLock3™ is an improved version of the UltraLock2™ system used in the DAC2 product family. UltraLock3™ locks with precise phase accuracy in only 6 ms. In contrast, the UltraLock2™ system required 400 ms. Both UltraLock™ systems provide virtually perfect jitter attenuation, but the the lightning-fast lock time of the new UltraLock3™ will be appreciated by many of our users.

DSP processing is 32-bits, DSP headroom is 3.5 dB, sample rate is 211 kHz, and jitter-induced distortion and noise is at least 140 dB below the level of the music - well below the threshold of hearing. Benchmark's UltraLock3™ system eliminates all audible jitter artifacts.

HIGH HEADROOM DSP - WITH 3.5 DB "EXCESS" DIGITAL HEADROOM

All of the digital processing in the DAC3 is designed to handle signals as high as +3.5 dBFS. Most digital systems clip signals that exceed 0 dBFS. The 0 dBFS limitation seems reasonable, as 0 dBFS is the highest sinusoidal signal level that can be represented in a digital system. However, a detailed investigation of the mathematics of PCM digital systems will reveal that inter-sample peaks may reach levels slightly higher than +3 dBFS while individual samples never exceed 0 dBFS. These inter-sample overs are common in commercial releases, and are of no consequence in a PCM system until they reach an interpolation process. But, for a variety of reasons, virtually all audio D/A converters use an interpolation process. The interpolation process is absolutely necessary to achieve 24-bit state-of-the art conversion performance. Unfortunately, inter-sample overs cause clipping in most interpolators. This clipping produces distortion products that are non-harmonic and non-musical . We believe these broadband distortion products often add a harshness or false high-frequency sparkle to digital reproduction. The DAC3 avoids these problems by maintaining at least 3.5 dB of headroom in the entire conversion system. We believe this added headroom is a groundbreaking improvement.

MULTI-MODE ASYNCHRONOUS USB SYSTEM

Benchmark's USB system supports USB Audio 2.0, DSD, and USB Audio 1.1. It is frequency agile, and will follow sample rate changes initiated by the computer and/or the media playback software. In all modes the USB communications are asynchronous in order to eliminate unnecessary sources of jitter.

The DAC3 has a low-jitter master clock which controls the transfer of audio data from the computer to the USB sub-system. The computer asynchronously transfers audio data to a buffer in the DAC3. The contents of the buffer are then asynchronously transferred to the D/A conversion subsystem. This second asynchronous transfer eliminates any traces of jitter that accumulate as the data is transferred between the USB and conversion subsystems. No traces of jitter-induced distortion are measurable to our measurement limits (better than -150 dBFS). This truly represents the state-of-the art. Enjoy the convenience of computer playback without compromise. The Asynchronous USB system supports USB Audio 2.0 for high-resolution 192kHz, and DSD playback. No drivers are required for MAC operating systems. An easy-to-install driver adds 192 kHz and DSD capabilities to Windows operating systems.

An asynchronous, driverless USB Audio 1.1 mode supports sample rates up to 96 kHz. This USB mode can be selected from the front panel or from the remote control. The driverless USB Audio 1.1 mode allows quick plug-and-play connections to Windows, MAC, iOS, and Linux operating systems without installing drivers. Just plug in the USB, and the DAC3 becomes an available audio device.

The USB subsystem remains active when the DAC3 is powered down. This prevents interruptions to the computer playback operations and eliminates the need to reconfigure the computer every time the converter is turned on.

QUAD 32-BIT BALANCED CONVERSION SYSTEM

Four balanced 32-bit D/A converters deliver audio to Benchmark's low-impedance current to voltage converters. The 4:1 redundancy reduces noise and distortion to levels that set new benchmarks. The conversion system at the core of the DAC3 is as good as it gets. The analog circuits that follow the D/A converter are carefully designed. Benchmark has leveraged its long history of building high-end analog audio equipment, in order to create an outstanding output stage.

The conversion system in the DAC3 achieves a 6 dB signal to noise improvement through the use of 4:1 summing. The ES9028PRO D/A is an 8-channel 32-bit converter. In the DAC3, four channels are summed in the analog domain to form each of the two output channels.

The 4:1 summing also improves the THD. The non-linearities in individual conversion channels are averaged across the four summed channels and incoherent non-linearities are attenuated by 6 dB.

DIAGNOSTIC TOOLS - SAMPLE-RATE AND WORD-LENGTH INDICATORS

Ever wonder why that 192 kHz 24-bit download on your computer just doesn't sound right? Your media player may be down-sampling to 44.1 kHz and/or truncating to 16-bits. Many computers and media players apply poor-quality sample rate conversion and truncation. Fortunately these problems can be eliminated with the selection a good frequency-agile media player. The sample-rate and word-length displays on the DAC3 confirm the proper operation of your media player.

CONTROL LOCK

The DAC3 B can be locked to avoid accidental changes that could cause a loss of audio in dedicated applications. This feature disables the IR remote control and the front panel buttons.

DIGITAL PASS THROUGH

The second coaxial input on the DAC3 can be reconfigured as a digital output. In output mode, any selected digital input (including USB) will pass through to the coaxial output. The digital pass through is bit-transparent and even supports DSD (DoP 1.1). Dolby digital and DTS formats can also be passed through to a surround processor.

BI-DIRECTIONAL 12 VOLT TRIGGER

Benchmark re-invents the 12 volt trigger. The trigger connection on the DAC2 can be used as an input, an output, or both. It is compatible with any common 12 volt trigger input or output. The trigger can be used to turn a power amplifier on or off automatically. The DAC3 will also respond to a 12 volt trigger to follow the actions of another audio component.

POWER SWITCH

The power switch can place the DAC3 in standby, or full shut down. In full shut down, the unit will still respond to the trigger input and the IR remote control. Power consumption is less than 0.5 W in full shut down.

LOW POWER CONSUMPTION

The DAC3 uses high-efficiency low noise power supplies and may be operated from any standard international voltage without adjustment. Power consumption is 12 W typical.

DISTRIBUTED POWER REGULATION

To achieve the lowest possible noise, the DAC3 uses distributed power supply regulation. Each critical subsystem has at least one dedicated low-noise voltage regulator.

AUDIO PERFORMANCE

Fs = 44.1 to 96 kHz, 20 to 20 kHz BW, 1 kHz test tone, 0 dBFS = +24 dBu (unless noted)

SNR – A-Weighted, 0 dBFS = +24 dBu

125 dB, 128 dB relative to intersample peaks

SNR – Unweighted, 0 dBFS = +24 dBu

123 dB, 126 dB relative to intersample peaks

THD+N, 1 kHz at 0 dBFS

-113 dBFS, -113 dB, 0.00022%

THD+N, 1 kHz at -1 dBFS

-114 dBFS, -113 dB, 0.00022%

THD+N, 1 kHz at –3 dBFS

-119 dBFS, -116 dB, 0.00016%

THD+N, 20 to 20 kHz test tone at –3 dBFS

-113 dBFS, -110 dB, 0.00032%

Frequency Response at Fs=192 kHz

+0 dB, -0.015 dB (20 to 20 kHz)

-0.015 dB at 10 Hz

-0.005 dB at 20 kHz

-0.031 dB at 40 kHz

-0.15 dB at 80 kHz

Frequency Response at Fs=48 kHz

+0 dB, -0.015 dB (20 to 20 kHz)

-0.015 dB at 10 Hz

-0.005 dB at 20 kHz

Crosstalk

-137 dB at 20 Hz

-130 dB at 1 kHz

-116 dB at 20 kHz

Maximum Amplitude of Jitter Induced Sidebands (10 kHz 0 dBFS test tone, 12.75 UI sinusoidal jitter at 1 kHz)

< -144 dB

Maximum Amplitude of Spurious Tones with 0 dBFS test signal

< -138 dB

Maximum Amplitude of Idle Tones

< -147 dB

Maximum Amplitude of AC line related Hum & Noise

< -133 dB

Inter-channel Differential Phase (Stereo Pair – any sample rate)

+/- 0.25 degrees at 20 kHz

Inter-channel Differential Phase (Between DAC3 Units Fs<110 kHz) Any sample rate.

+/- 0.25 degrees at 20 kHz

Maximum Lock Time after Fs change

6 ms

Soft Mute Ramp Up/Down Time

9.6 ms

Mute on Receive Error

Yes

Mute on Lock Error

Yes

Mute on Idle Channel

No

50/15 us De-Emphasis Enable

Automatic in Consumer Mode

De-Emphasis Method

Digital IIR

De-Emphasis Supported at

Fs = 32, 44.1, 48 kHz


GROUP DELAY (LATENCY)

Delay – Digital Input to Analog Output (function of sample rate)

1.36 ms at 44.1 kHz

1.27 ms at 48 kHz

0.90 ms at 88.2 kHz

0.82 ms at 96 kHz

0.51 ms at 176.4 kHz

0.47 ms at 192 kHz


DIGITAL AUDIO INPUTS

Number of Digital Inputs (switch selected)

5 (1 USB, 2 Optical, 2 Coaxial)

Number of Channels

2

Input Sample Frequency Range

28 to 210 kHz (Coaxial Inputs)

28 to 96 kHz (Optical Inputs)

44.1, 48, 88.2, 96, 176.4, 192 kHz (USB Input)

Maximum Input Word Length

24 bits

Digital Input Impedance

75 Ohms (Coaxial Inputs)

DC Blocking Capacitors on Digital Inputs

Yes (Coaxial Inputs)

Transient and Over-Voltage Protection on Digital Inputs

Yes (Coaxial Inputs)

Minimum Digital Input Level

250 mVpp (Coaxial Inputs)

Jitter Tolerance

(With no Measurable Change in Performance)

>12.75 UI sine, 100 Hz to 3 kHz

>1.5 UI sine at 20 kHz

>1.5 UI sine at 40 kHz

>1.5 UI sine at 80 kHz

>1.5 UI sine at 90 kHz

>0.25 UI sine above 160 kHz

Jitter Attenuation Method

Benchmark UltraLock3™ - all inputs


BALANCED ANALOG OUTPUTS

Number of Balanced Analog Outputs

2

Output Connector

Gold-Pin Neutrik™ male XLR

Output Impedance

60 Ohms (Attenuator off)

425 Ohms (Attenuator = 10 dB)

135 Ohms (Attenuator = 20 dB)

Analog Output Clip Point

+30 dBu

Factory Calibration (at 0 dBFS)

+24 dBu (Attenuator off)

Output Level Variation with Sample Rate (44.1 kHz vs. 96 kHz)

< +/- 0.006 dB


UNBALANCED ANALOG OUTPUTS

Number of Unbalanced Analog Outputs

2

Output Connector

RCA

Output Impedance

30 Ohms

Analog Output Clip Point

+13.5 dBu (3.7 Vrms)

Factory Calibration (at 0 dBFS)

+8.2 dBu (2 Vrms)

Output Level Variation with Sample Rate

< +/- 0.006 dB


STATUS DISPLAY

Indicators - Type and Location

12 LED’s on Front Panel

Selection/Status Indication

1 – Control Lock

5 – Input

2 – Word length

4 – Sample Rate




AC POWER REQUIREMENTS

Nominal Input Operating Voltage Range (VAC RMS)

100 – 240V

Frequency

50-60 Hz

Power

< 0.5 Watts Idle
12 Watts Typical Program
13 Watts Maximum

Fuses

5 x 20 mm (2 required)
0.5 A 250 V Slo-Blo® Type

Min/Max Operating range (VAC RMS)

90 – 260 VAC
47 – 63 Hz


DIMENSIONS

Form Factor

½ Rack Wide, 1 RU High

Depth behind front panel

8.5” (216 mm)

Overall depth including connectors but without power cord

9.33” (237 mm)

Width

9.5” (249 mm)

Height

1.725” (44.5 mm)


WEIGHT

DAC3 only

3 lb.

DAC3 with remote control, power cord, extra fuses, and manual

4 lb.

Shipping weight

7 lb.


IMPORTANT FEATURES

  • Sample Rate Display
  • Word Length Display
  • 5 Digital Inputs
  • 2 Stereo Analog Outputs (1 RCA, 1 XLR)
  • Digital Pass Through
  • Native DSD Conversion
  • Control-lock Switch
  • Asynchronous USB 2.0
  • Driverless Asynchronous USB 1.1
  • Bi-Directional 12 Volt Trigger
  • Power Switch
  • Low Power Consumption
  • ES9028PRO Converter
BENCHMARK DAC3 B - DIGITAL TO ANALOG AUDIO CONVERTER
฿66,300
DAC3 B - REFERENCE QUALITY - BASIC FEATURES The DAC3 B is the basic D/A converter in Benchmark's DAC3 converter series. The DAC3 B is the ideal conver..
฿66,300

Available Options

BENCHMARK DAC3 DX - DIGITAL TO ANALOG AUDIO CONVERTER

xxx แบรนด์: BENCHMARK

รหัสสินค้า: BENCHMARK DAC3 DX - DIGITAL TO ANALOG AUDIO CONVERTER

฿81,900

BENCHMARK PERFORMANCE

DAC3 VS. DAC2

The DAC3builds upon Benchmark’s highly successful DAC2 product family. The DAC3 maintains the familiar DAC2 form factor, but adds the higher performance available from the new ES9028PRO D/A converter. The DAC3 DX offers the following improvements over the DAC2 DX:

  • Active 2nd Harmonic Compensation
  • Active 3rd Harmonic Compensation
  • Lower THD+N
  • Lower passband ripple
  • Improved frequency response
  • Faster PLL lock times
  • Faster switching between inputs
  • Adjustable calibration

DAC3 VS. DAC1

The DAC3 and DAC2 add these features that are not found on the DAC1:

  • Asynchronous 192kHz USB Audio 2.0
  • 32-bit D/A conversion system
  • Word Length Display
  • Sample Rate Display
  • Polarity Control
  • Direct DSD D/A Conversion
  • -20 dB DIM
  • Bi-Directional 12V Trigger
  • Power Switch 
  • Home Theater Bypass
  • Digital Pass-Through
  • High-Headroom DSP
  • Dual-Domain Hybrid Gain Control
  • Additional I/O

DAC3 TECHNOLOGIES

3:1 PARALLEL CONVERSION STRUCTURE

The conversion system in the DAC3 DX achieves a 4.77 dB signal to noise improvement through the use of 3:1 summing on the main output bus. The ES9028PRO D/A is an 8-channel 32-bit converter. In the DAC3 DX, three channels are summed in the analog domain to form each of the two output channels on the main bus. The remaining two channels provide the aux bus outputs

The 3:1 summing also improves the THD. The non-linearities in individual conversion channels are averaged across the four summed channels and incoherent non-linearities are attenuated by up to 4 dB.

HARMONIC COMPENSATION

The ES9028PRO has two distortion compensation systems that independently remove most of the 2nd and 3rd harmonic distortion in the D/A converter. Benchmark's ultra-clean analog output stages allow these systems to be fully leveraged in the DAC3 series. To the best of our knowledge, no other D/A converter has lower THD than the Benchmark DAC3 series.


The DAC3 DX is Benchmark's newest 2-channel D/A converter. When compared to the legendary DAC1, the DAC3 series has lower noise, lower distortion, and improved accuracy. The DAC1 and DAC2 series converters have become the reference standard in many of the finest recording studios and mastering rooms. The DAC3 defines a new reference.

DAC3 converters deliver outstanding musical detail and precise stereo imaging. They employ an advanced high-headroom digital filter design, and a high-sample-rate Asynchronous USB Audio interface. All inputs are fully isolated from interface jitter by Benchmark's new UltraLock3™ jitter attenuation system.

Internal digital processing and conversion is 32-bits, and includes 3.5 dB of headroom above 0 dBFS. Three balanced 32-bit D/A converters are summed together to form the main output bus. Two channels are reserved for the auxiliary RCA output bus.

The performance of the DAC3 DX exceeds the measurement limits of today's state-of-the art test equipment.

NATIVE DSD CONVERSION

DSD (in DoP 1.1 format) is automatically detected on USB, coaxial, and XLR digital inputs. The system seamlessly switches between native DSD and native PCM conversion. DoP 1.1 is supported by many media players, and DSD downloads are now available from several sources.

Enjoy seamless transitions between native DSD and native PCM playback.

DIRECT CONNECTIVITY TO POWER AMPLIFIERS AND POWERED MONITORS

Benchmark DAC1DAC2, and DAC3 converters are designed to directly drive power amplifiers and powered speakers. Benchmark converters feature adjustable low-impedance passive attenuators at the XLR outputs that can be used to optimize the interface to the power amplifier (or powered monitor). The sonic importance of these attenuators cannot be overemphasized. Proper gain matching between the DAC/preamplifier and the power amplifier is essential for achieving peak system performance. The attenuators allow precise matching to all amplifiers and powered monitors.

Passive output attenuators are only found on Benchmark converters - don't settle for anything less.

SONICALLY NEUTRAL

All Benchmark converters are designed for maximum transparency. This transparency is absolutely essential in the studio monitoring chain. DAC3 converters are ideal for critical reference-quality professional systems. In home applications, the DAC2 delivers the sonic signature that was created in the recording studio.

Hear the music exactly as it was heard in the studio.

TAKE THE STUDIO HOME

When Benchmark's professional converters are used in hi-fi applications, studio-quality sound can be enjoyed in a home environment.

Discover the natural, uncolored, analog sound of the DAC3.

THE DIGITAL-ONLY DAC3 FOR AUDIO PROFESSIONALS

The DAC3 DX is the DAC3 of choice for users who do not need analog inputs.

The DX is well suited to the needs of professional users and includes an XLR AES digital input. The DAC3 DX is the only DAC3 model that includes dual stereo output buses. The analog output buses can be independently set to fixed or variable gain. The DAC3 DX is also the only DAC3 available in a rack-mount version.

A NEW REFERENCE - GOING BEYOND THE LEGENDARY DAC1 AND DAC2

Benchmark's DAC1 and DAC2 series converters have been the reference to which other converters have been compared. It is rare to find a converter review that does not draw comparisons to the DAC1 or DAC2. The DAC1 and DAC2 have been some of the best-selling 2-channel reference-quality converters and are in daily use at many of the finest recording studios and mastering rooms. Benchmark converters are also enjoyed by thousands of audiophiles. Benchmark has raised the bar ... the DAC3 defines a new reference.

PROFESSIONAL APPLICATIONS

  • Reference-Quality Studio Monitoring
  • Sound-Card Elimination for Computer Audio
  • Stand-Alone Headphone Amplifier for Digital Sources
  • USB to SPDIF Transfer Device

HI-FI APPLICATIONS

The DAC2 DX uses digital connections (USB, Optical, Coaxial, or AES) to bypass the low-quality built-in converters that are included in many audio products. 

  • Audio Output Device for Music and Video Servers
  • Home Hi-Fi Playback from Digital Sources
  • Audio Output Device for TV and Home Theater Systems 

ADD BENCHMARK CABLES TO COMPLETE YOUR NEW SYSTEM

Benchmark offers a no-nonsense selection of very high-quality cables. Benchmark cables are designed for durability and transparency, and most are manufactured in the USA. Our optical cables are manufactured in Canada.

BENCHMARK TECHNOLOGIES

Benchmark includes some exciting technologies in the DAC2:

  • Hybrid Gain Control
  • Low-Impedance Passive Output Attenuators
  • High-Headroom DSP
  • UltraLock3™ Jitter Attenuation System
  • High-Headroom 32-bit DSP
  • Quad 32-bit balanced D/A Conversion System
  • Multi-Mode Asynchronous USB Audio System
  • Digital Diagnostic Display
  • Volume-Control Bypass
  • Digital Pass Through
  • Distributed Power Regulation
  • "Zero-Ohm" HPA2 Headphone Amplifier

HYBRID GAIN CONTROL

The DAC3 DX combines passive low-impedance attenuators, a 32-bit digital gain control, and a servo-driven volume control. All analog outputs are controlled by the rotary volume control unless the calibrated output function is selected. The motorized volume control moves in response to commands from the remote control. Audio does not pass through the volume control. The position of the rotary knob is precisely measured, and digital gain coefficients are calculated. The gain coefficients are filtered and passed to a 32-bit high-headroom DSP system. The 32-bit output of this system is connected directly to the array of 32-bit digital to analog converters. This system can provide a wide range of volume control without losing resolution. The DSP system preserves precise L/R balance, and precise stereo imaging, while avoiding any source of noise and distortion.

The volume control is one of the most critical functions in the audio chain, enjoy the best system available.

LOW-IMPEDANCE PASSIVE OUTPUT ATTENUATORS

Benchmark's unique passive output attenuators provide distortion-free gain reduction without reducing the dynamic range (or SNR) of the converter. The attenuators optimize the gain staging between the DAC3 DX and the power amplifier. This optimization is absolutely essential for maximizing the dynamic range of the entire playback system. Much of the success of the DAC1 and DAC2 converters can be attributed to the passive output attenuators. Musical details can be obscured by system noise whenever a preamplifier and power amplifier are improperly matched. The passive attenuators enable full use of your power amplifier's dynamic range.

Experience new details in your favorite recordings.

ULTRALOCK3™ JITTER ATTENUATION SYSTEM

UltraLock3™ is an improved version of the UltraLock2™ system used in the DAC2 product family. On both of these systems, DSP processing is 32-bits, DSP headroom is 3.5 dB, sample rate is 211 kHz, and jitter-induced distortion and noise is at least 140 dB below the level of the music - well below the threshold of hearing. But, the new UltraLock3™ system provides instantaneous (6 ms) lock times. This makes it much easier to perform A/B comparisons between two digital inputs.

Benchmark's UltraLock3™ system eliminates all audible jitter artifacts.

HIGH-HEADROOM DSP

All D/A converters need 3.5 dB "excess" digital headroom, but few have any headroom above 0 dBFS.

All of the digital processing in the DAC3 DX is designed to handle signals as high as +3.5 dBFS. Most digital systems clip signals that exceed 0 dBFS. The 0 dBFS limitation seems reasonable, as 0 dBFS is the highest sinusoidal signal level that can be represented in a digital system. However, a detailed investigation of the mathematics of PCM digital systems will reveal that inter-sample peaks may reach levels slightly higher than +3 dBFS while individual samples never exceed 0 dBFS. These inter-sample overs are common in commercial releases, and are of no consequence in a PCM system until they reach an interpolation process. But, for a variety of reasons, virtually all audio D/A converters use an interpolation process. The interpolation process is absolutely necessary to achieve 24-bit state-of-the art conversion performance. Unfortunately, inter-sample overs cause clipping in most interpolators. This clipping produces distortion products that are non-harmonic and non-musical . We believe these broadband distortion products often add a harshness or false high-frequency sparkle to digital reproduction. The DAC3 DX avoids these problems by maintaining at least 3.5 dB of headroom in the entire conversion system.

We believe this added headroom is a groundbreaking improvement delivering significant sonic advantages.

QUAD 32-BIT BALANCED CONVERSION SYSTEM

Four balanced 32-bit D/A converters deliver audio to Benchmark's low-impedance current to voltage converters. The main bus feeds the balanced XLR outputs and one set of unbalanced RCA outputs. The main bus uses 3:1 redundancy to reduce conversion noise by 4.77 dB. The redundancy also tends to reduce distortion. A fourth set of conversion channels are reserved for the auxiliary bus that feeds the second set of RCA outputs.

Similar redundancy is built into the native DSD conversion system.

The analog circuits that follow the D/A converter are carefully designed. Benchmark has leveraged its long history of building high-end analog audio equipment, in order to create an outstanding analog output stage.

Digital converters are never better than the analog stages that support the conversion process.

MULTI-MODE ASYNCHRONOUS USB SYSTEM

Benchmark's USB system supports USB Audio 2.0, DSD, and USB Audio 1.1. It is frequency agile, and will follow sample rate changes initiated by the computer and/or the media playback software. In all modes the USB communications are asynchronous in order to eliminate unnecessary sources of jitter.

The DAC3 DX has a low-jitter master clock which controls the transfer of audio data from the computer to the USB sub-system. The computer asynchronously transfers audio data to a buffer in the DAC3 DX. The contents of the buffer are then asynchronously transferred to the D/A conversion sub-system. This second asynchronous transfer eliminates any traces of jitter that accumulate as the data is transferred between the USB and conversion subsystems. No traces of jitter-induced distortion are measurable to our measurement limits (better than -150 dBFS). This truly represents the state-of-the art. Enjoy the convenience of computer playback without compromise. The Asynchronous USB system supports USB Audio 2.0 for high-resolution 192kHz, and DSD playback. No drivers are required for MAC operating systems. An easy-to-install driver adds 192 kHz and DSD capabilities to Windows operating systems.

An asynchronous, driverless USB Audio 1.1 mode supports sample rates up to 96 kHz. This USB mode can be selected from the front panel or from the remote control. The driverless USB Audio 1.1 mode allows quick plug-and-play connections to Windows, MAC, iOS, and many Linux operating systems without installing drivers. Just plug in the USB, and the DAC2 DX becomes an available audio device.

The USB subsystem remains active when the DAC2 DX is powered down. This prevents interruptions to the computer playback operations and eliminates the need to reconfigure the computer every time the converter is turned on.

Enjoy the convenience of USB connectivity without any compromise to audio performance.

DIGITAL DIAGNOSTIC DISPLAY

Ever wonder why that 192 kHz 24-bit download on your computer just doesn't sound right? Your media player may be down-sampling to 44.1 kHz and/or truncating to 16-bits. Many media players apply poor-quality sample rate conversion and truncation. Fortunately these problems can be eliminated with the selection of a good frequency-agile media player. The sample-rate and word-length displays on the DAC3 DX confirm the proper operation of your media player. These tools are also essential in the studio - get instant confirmation of sample rates and word lengths. The DAC3 DX measures the sample rate and examines bit activity, it does not use metadata flags (which are often incorrect).

Know when High-Resolution Audio is being delivered to your DAC.

VOLUME-CONTROL BYPASS

The DAC3 DX has two analog output busses. Each bus can be placed in a calibrated volume-control bypass mode in order to provide a full-level output while using an upstream digital volume control or downstream analog volume control. This feature is useful in many professional applications and it is also useful when the DAC3 DX is feeding a Hi-Fi preamplifier.

The bypass function should be enabled whenever a Hi-Fi preamplifier is inserted between the DAC3 DX and the power amplifier. However, for best performance, Benchmark strongly recommends connecting the DAC3 DX directly to the power amplifier. The DAC3 DX performs all the functions of a DAC and a Hi-Fi preamplifier - a separate downstream Hi-Fi preamplifier can only degrade the performance.

The Volume-Control Bypass provides flexibility for specialized applications.

DIGITAL PASS-THROUGH FUNCTION

The second coaxial input can be reconfigured as a digital output. In output mode, any selected digital input (including USB) will pass through to the coaxial output. The digital pass through is bit-transparent and even supports DSD (DoP 1.1). Dolby digital and DTS formats can be passed through to a surround processor.

The Pass-Through Function provides a coaxial output for any USB-connected computer.

POWER SWITCH

The DAC3 DX will enter a standby mode if the selected digital input is inactive for more than 5 minutes. Operation will resume when the selected digital input become active.The power switch places the DAC3 DX in "full shutdown". Power consumption is less than 0.5 W in "full shutdown". The DAC3 DX will respond the IR remote or the 12V trigger while in "full shutdown".

The DAC3 DX saves energy by meeting or exceeding all standby power standards.

LOW POWER CONSUMPTION

The DAC3 DX uses high-efficiency low noise power supplies and may be operated from any standard international voltage without adjustment. Low-noise audio circuits require generous amounts of power. High-efficiency circuits in the DAC2 DX deliver this power without wasted energy.

Power consumption is 12 W - typical.

DISTRIBUTED POWER REGULATION

To achieve the lowest possible noise, the DAC3 DX uses distributed power supply regulation. Each critical subsystem has at least one dedicated low-noise voltage regulator. There are 20 voltage regulators in the DAC3 DX.

This power system is so effective that there no evidence of any AC line-related hum and noise are at least 135 dB below the calibrated output level.

"ZERO-OHM" HPA2 HEADPHONE POWER AMPLIFIER

The DAC3 DX features the HPA2 - Benchmark's signature high-current, 0-Ohm headphone power amplifier. The HPA2 is arguably the ultimate reference headphone power amplifier. It will deliver the full rated performance of the DAC3 DX to the headphones. The HPA2 maintains less than 0.001% THD+N into 30 Ohms. The DAC3 has two 1/4" headphone jacks on the front panel. The performance of the HPA2 remains consistent even when two headphones are being driven simultaneously.

The 0.11-Ohm output impedance of the HPA2™ maintains tight control of headphone transducers.

AUDIO PERFORMANCE

Fs = 44.1 to 96 kHz, 20 to 20 kHz BW, 1 kHz test tone, 0 dBFS = +24 dBu (unless noted)

SNR – A-Weighted, 0 dBFS = +28 dBu

127 dB

SNR – Unweighted, 0 dBFS = +28 dBu

125 dB

THD+N, 1 kHz at 0 dBFS

-111 dBFS, -111 dB, 0.00028%

THD+N, 1 kHz at -1 dBFS

-112 dBFS, -111 dB, 0.00028%

THD+N, 1 kHz at –3 dBFS

-116 dBFS, -113 dB, 0.00022%

THD+N, 20 to 20 kHz test tone at –3 dBFS

-108 dBFS, -105 dB, <0.00056%

Frequency Response at Fs=192 kHz

+/- 0.005 dB (20 to 20 kHz)

-0.013 dB at 10 Hz

+0.005 dB at 20 kHz

+0.006 dB at 40 kHz

-0.002 dB at 80 kHz

Frequency Response at Fs=48 kHz

+/- 0.006 dB (20 to 20 kHz)

-0.015 dB at 10 Hz

-0.001 dB at 20 kHz

Crosstalk

-120 dB at 20 Hz

-120 dB at 1 kHz

-106 dB at 20 kHz

Maximum Amplitude of Jitter Induced Sidebands (10 kHz 0 dBFS test tone, 12.75 UI sinusoidal jitter at 1 kHz)

< -144 dB

Maximum Amplitude of Spurious Tones with 0 dBFS test signal

< -138 dB

Maximum Amplitude of Idle Tones

< -147 dB

Maximum Amplitude of AC line related Hum & Noise

< -135 dB

Inter-channel Differential Phase (Stereo Pair – any sample rate)

+/- 0.25 degrees at 20 kHz

Inter-channel Differential Phase (Between DAC3 DX Units Fs<110 kHz) Any sample rate.

+/- 0.25 degrees at 20 kHz

Maximum Lock Time after Fs change

400 ms

Soft Mute Ramp Up/Down Time

50 ms

Mute on Receive Error

Yes

Mute on Lock Error

Yes

Mute on Idle Channel

No

50/15 us De-Emphasis Enable

Automatic in Consumer Mode

De-Emphasis Method

Digital IIR

De-Emphasis Supported at

Fs = 32, 44.1, 48 kHz


GROUP DELAY (LATENCY)

Delay – Digital Input to Analog Output (function of sample rate)

1.36 ms at 44.1 kHz

1.27 ms at 48 kHz

0.90 ms at 88.2 kHz

0.82 ms at 96 kHz

0.51 ms at 176.4 kHz

0.47 ms at 192 kHz


DIGITAL AUDIO INPUTS

Number of Digital Inputs (switch selected)

6 (1 USB, 2 Optical, 1 XLR, 2 Coaxial)

Number of Channels

2

Input Sample Frequency Range

28 to 210 kHz (Coaxial and XLR)

28 to 96 kHz (Optical)

44.1, 48, 88.2, 96, 176.4, 192 kHz (USB)

Maximum Input Word Length

24 bits

Digital Input Impedance

75 Ohms Coaxial, 110 Ohms XLR

DC Blocking Capacitors on Digital Inputs

Yes (Coaxial and XLR Inputs)

Transient and Over-Voltage Protection on Digital Inputs

Yes (Coaxial and XLR Inputs)

Transformer Coupling on Digital Inputs

Yes (XLR Input)

Minimum Digital Input Level

250 mVpp (Coaxial and XLR Inputs)

Jitter Tolerance

(With no Measurable Change in Performance)

>12.75 UI sine, 100 Hz to 3 kHz

>1.5 UI sine at 20 kHz

>1.5 UI sine at 40 kHz

>1.5 UI sine at 80 kHz

>1.5 UI sine at 90 kHz

>0.25 UI sine above 160 kHz

Jitter Attenuation Method

Benchmark UltraLock3™ - all inputs


BALANCED ANALOG OUTPUTS

Number of Balanced Analog Outputs

2

Output Connector

Gold-Pin Neutrik™ male XLR

Output Impedance

60 Ohms (Attenuator off)

425 Ohms (Attenuator = 10 dB)

135 Ohms (Attenuator = 20 dB)

Analog Output Clip Point

+29 dBu

Factory Set Bypass Level (at 0 dBFS)

+24 dBu (Attenuator = 0 dB)

Output Level Range (at 0 dBFS) In ‘Variable’ Mode

Off to +28 dBu (Attenuator off)

Off to +18 dBu (Attenuator = 10 dB)

Off to +8 dBu (Attenuator = 20 dB)

Output Level Variation with Sample Rate (44.1 kHz vs. 96 kHz)

< +/- 0.006 dB


UNBALANCED ANALOG OUTPUTS

Number of Unbalanced Analog Outputs

4

Output Connector

RCA

Output Impedance

30 Ohms

Analog Output Clip Point

+13.5 dBu

Factory Set Home Theater Bypass Output Level (at 0 dBFS)

+8.2 dBu (2 Vrms)

Output Level Range (at 0 dBFS)

Off to +12.2 dBu (3.2 Vrms)

Output Level Variation with Sample Rate (44.1 kHz vs. 96 kHz)

< +/- 0.006 dB


HPA2TM HEADPHONE OUTPUTS

Number of Headphone Outputs

2

Output Connectors

¼” TRS with switch on left-hand jack

Output Impedance

< 0.11 Ohms

Output Level Control

Stereo Control on Front Panel

Output Level Range (at 0 dBFS) into 60-Ohm Load

Off to +22 dBu (9.7 Vrms)

Maximum Output Current

250 mA

Overload Protection (independent per channel)

Current limited at 300 mA, also thermally protected

Bandwidth

> 500 kHz

THD+N

-100 dB, 0.001% into 30 Ohms at 50 mW

1.26W maximum into 30 Ohms


STATUS DISPLAY

Indicators - Type and Location

16 LED’s on Front Panel

Selection/Status Indication

2 – Mute, Dim
6 – Input
2 – Bypass/Calibrated Output
2 – Word length
4 – Sample Rate




AC POWER REQUIREMENTS

Nominal Input Operating Voltage Range (VAC RMS)

100 – 240V

Frequency

50-60 Hz

Power

< 0.5 Watts Idle
12 Watts Typical Program
15 Watts Maximum

Fuses

5 x 20 mm (2 required)
0.5 A 250 V Slo-Blo® Type

Min/Max Operating range (VAC RMS)

90 – 260
47 – 63Hz


DIMENSIONS

Form Factor

½ Rack Wide, 1 RU High

Depth behind front panel

8.5” (216 mm)

Overall depth including connectors but without power cord

9.33” (237 mm)

Width

9.5” (249 mm)

Height

1.725” (44.5 mm)


WEIGHT

DAC3 DX only

3 lb.

DAC3 DX with remote control, power cord, extra fuses, and manual

4 lb.

Shipping weight

7 lb.


DAC3 DX FEATURES

  • Sample-Rate Display
  • Word-Length Display
  • Six Digital Inputs
  • Three Stereo Analog Outputs
  • Two Independent Analog Output Buses
  • Digital Pass Through
  • Dual HPA2 Headphone Outputs
  • Headphone Mute Switch - left headphone jack mutes main output, function may be defeated
  • Native DSD Conversion
  • Native PCM Conversion
  • Asynchronous USB 2.0
  • Asynchronous USB 1.1 for Driverless Operation
  • Volume Control Bypass Function for Main Bus
  • Volume Control Bypass Function for Auxiliary Bus
  • 12V Trigger I/O - for sequenced system power switching
  • Mute Relays - on all analog outputs
  • Optional IR Remote Control - with heavy-duty metal housing
  • Power Switch
  • Low Power Consumption

RACK-MOUNT OPTIONS

The DAC3 DX is available in rackmount chassis. Non-rackmount versions can also be rackmounted using Benchmark's 1-RU tray. All Benchmark DAC3DAC2DAC1ADC1, and MPA1 products are housed in a 1/2-wide 1 RU chassis. Two units can be mounted side-by-side in a standard 19" rack. The rackmount version of the DAC3 DX is 1/2 rack wide and requires a blank plate and coupler if mounted by itself.

BENCHMARK DAC3 DX - DIGITAL TO ANALOG AUDIO CONVERTER
฿81,900
BENCHMARK PERFORMANCE DAC3 VS. DAC2 The DAC3builds upon Benchmark’s highly successful DAC2 product family. The DAC3 maintains the familiar DAC2 form..
฿81,900

Available Options

BENCHMARK DAC3 HGC - DIGITAL TO ANALOG AUDIO CONVERTER

xxx แบรนด์: BENCHMARK

รหัสสินค้า: BENCHMARK DAC3 HGC - DIGITAL TO ANALOG AUDIO CONVERTER

฿86,000

A NEW REFERENCE - GOING BEYOND THE LEGENDARY DAC1 AND DAC2

The DAC3 is Benchmark's newest 2-channel D/A converter featuring the new ESS Technologies ES9028PRO converter chip. The DAC3 converter has lower THD and THD+N noise than Benchmark's DAC2 converter.

Benchmark's DAC1 and DAC2 D/A converter families have been the reference to which other converters have been compared. It is rare to find a converter review that does not draw comparisons to the DAC1 or the DAC2. Benchmark converters are in daily use at many of the world's finest recording studios and mastering rooms. Benchmark converters are also enjoyed by thousands of audiophiles. Benchmark has raised the bar again ... the DAC3 defines a new reference.

REFERENCE PERFORMANCE

The DAC3 delivers outstanding musical detail and precise stereo imaging. It employs an advanced high-headroom digital filter design, and a high-sample-rate Asynchronous USB Audio interface. All inputs are fully isolated from interface jitter by Benchmark's new UltraLock3™ jitter attenuation system.

Internal digital processing and conversion is 32-bits, and this processing includes 3.5 dB of headroom above 0 dBFS. This headroom prevents the DSP overloads that commonly occur in other D/A converters.

Four balanced 32-bit D/A converters are summed together to create each balanced analog output. This 4:1 summation provides a 6 dB noise reduction, and gives the DAC3 industry-leading performance.

DAC3 VS. DAC2

The DAC3builds upon Benchmark’s highly successful DAC2 product family. The DAC3 maintains the familiar DAC2 form factor and feature set, but adds the higher performance available from the new ES9028PRO D/A converter. The DAC3 offers the following improvements over the DAC2:

  • Active 2nd Harmonic Compensation
  • Active 3rd Harmonic Compensation
  • Lower THD+N
  • Lower passband ripple
  • Improved frequency response
  • Faster PLL lock times
  • Faster switching between input signals

DAC3 VS. DAC1

The DAC3 and DAC2 added these features that were not found on the DAC1:

  • Asynchronous 192kHz USB Audio 2.0
  • 32-bit D/A conversion system
  • Word Length Display
  • Sample Rate Display
  • Polarity Control
  • Direct DSD D/A Conversion
  • -20 dB DIM
  • Bi-Directional 12V Trigger
  • Power Switch with Auto-On Function
  • Home Theater Bypass
  • Digital Pass-Through
  • High-Headroom DSP
  • Dual-Domain Hybrid Gain Control
  • Additional I/O

NATIVE DSD CONVERSION

All digital inputs on the DAC3 support native PCM or DSD conversion. From any input, DSD is transported with bit accuracy over DoP 1.1. DSD and PCM are both natively converted to analog. There are no DSD to PCM or PCM to DSD conversions to compromise the quality of the music. The DAC3 conversion system seamlessly switches between native PCM and native DSD conversion. DSD over DoP 1.1 is supported by many media players, and DSD downloads are now available from several sources.

DIRECT CONNECTIVITY TO POWER AMPLIFIERS

Benchmark DAC1DAC2, and DAC3 converters are designed to directly drive power amplifiers and speakers. Benchmark converters feature adjustable low-impedance passive attenuators at the XLR outputs that can be used to optimize the interface to the power amplifier (or powered monitor). This unique Benchmark feature optimizes the gain staging between the DAC and the power amplifier. Proper gain staging cannot be overemphasised. When audio stages are properly matched, each component in the audio chain is able to operate at its optimum signal level, and the system performance is significantly improved.

SONICALLY-NEUTRAL STUDIO MONITORING

All Benchmark converters are designed for maximum transparency. This transparency is absolutely essential in the studio monitoring chain. For this reason, DAC3 converters are ideal for critical reference-quality professional systems. Unlike many competing products, the DAC3 is not designed to add "euphonic" coloration to the audio. Instead it is designed to be as uncolored and natural as possible.

STEP INTO THE STUDIO

When Benchmark's professional converters are used in hi-fi applications, studio-quality sound can be enjoyed in a home environment. Enjoy pure music without any coloration from the electronics. Hear the music exactly the way it was heard in the studio, and exactly the way the artists intended.

Discover the natural, uncolored, analog sound of the DAC3.

SIT IN THE PERFORMANCE SPACE

Transparent sound can go beyond replicating the studio experience. Recordings that have been produced with a natural and unprocessed sound can transport you to the performance space. But, this can only happen when the entire playback chain is selected for maximum transparency.

This experience of "being there" cannot be created by systems that are designed to add "warmth" or "euphonic color" to the music. 

DAC3 TECHNOLOGIES

  • Harmonic Compensation
  • Hybrid Gain Control
  • UltraLock3™ Jitter Attenuation System
  • High-Headroom DSP
  • Multi-Mode Asynchronous USB Audio System
  • Quad 32-bit balanced D/A Conversion System
  • Distributed Power Regulation

HARMONIC COMPENSATION

The ES9028PRO has two distortion compensation systems that independently remove most of the 2nd and 3rd harmonic distortion in the D/A converter. Benchmark's ultra-clean analog output stages allow these systems to be fully leveraged in the DAC3. To the best of our knowledge, no other D/A converter has lower THD than the Benchmark DAC3.

HYBRID GAIN CONTROL

"HGC" is Benchmark's unique Hybrid Gain Control system. The DAC3 combines active analog gain control, passive low-impedance attenuators, a 32-bit digital gain control, and a servo-driven volume control. All inputs are controlled by the rotary volume control. This volume control moves in response to commands from the remote control. Analog inputs are never converted to digital, and digital inputs never pass through an analog potentiometer. Digital inputs are precisely controlled in the 32-bit DSP system. The DSP system preserves precise L/R balance, and precise stereo imaging, while avoiding any source of noise and distortion.

Benchmark's unique passive output attenuators provide distortion-free gain reduction without reducing the dynamic range of the converter. The attenuators optimize the gain staging between the DAC3 and the power amplifier. This optimization is absolutely essential for maximizing the dynamic range of the entire playback system. Much of the success of the DAC1 and DAC2 converters can be attributed to the passive output attenuators. Musical details can be obscured by system noise whenever a preamplifier and power amplifier are improperly matched. The" HGC " system will make full use of your power amplifier's dynamic range. Experience new details in your favorite recordings.

ULTRALOCK3™ JITTER ATTENUATION SYSTEM

UltraLock3™ is an improved version of the UltraLock2™ system used in the DAC2 product family. UltraLock3™ locks with precise phase accuracy in only 6 ms. In contrast, the UltraLock2™ system required 400 ms. Both UltraLock™ systems provide virtually perfect jitter attenuation, but the the lightning-fast lock time of the new UltraLock3™ will be appreciated by many of our users.

DSP processing is 32-bits, DSP headroom is 3 dB, sample rate is 211 kHz, and jitter-induced distortion and noise is at least 140 dB below the level of the music - well below the threshold of hearing. Benchmark's UltraLock3™ system eliminates all audible jitter artifacts.

HIGH HEADROOM DSP - WITH 3.5 DB "EXCESS" DIGITAL HEADROOM

All of the digital processing in the DAC3 is designed to handle signals as high as +3.5 dBFS. Most digital systems clip signals that exceed 0 dBFS. The 0 dBFS limitation seems reasonable, as 0 dBFS is the highest sinusoidal signal level that can be represented in a digital system. However, a detailed investigation of the mathematics of PCM digital systems will reveal that inter-sample peaks may reach +3.01 dBFS while individual samples never exceed 0 dBFS. These inter-sample peaks are common in commercial releases, and are of no consequence in a PCM system until they reach an interpolation process. But, for a variety of reasons, virtually all audio D/A converters use an interpolation process. The interpolation process is absolutely necessary to achieve 24-bit state-of-the art conversion performance. Unfortunately, inter-sample peaks exceeding 0 dBFS cause clipping in most interpolators. This clipping produces distortion products that are non-harmonic and non-musical . We believe these broadband distortion products often add a harshness or false high-frequency sparkle to digital reproduction. The DAC3 avoids these problems by maintaining at least 3.5 dB of headroom in the entire conversion system. We believe this added headroom is a groundbreaking improvement.

MULTI-MODE ASYNCHRONOUS USB SYSTEM

Benchmark's USB system supports USB Audio 2.0, DSD, and USB Audio 1.1. It is frequency agile, and will follow sample rate changes initiated by the computer and/or the media playback software. In all modes the USB communications are asynchronous in order to eliminate unnecessary sources of jitter.

The DAC3 has a low-jitter master clock which controls the transfer of audio data from the computer to the USB sub-system. The computer asynchronously transfers audio data to a buffer in the DAC3. The contents of the buffer are then asynchronously transferred to the D/A conversion subsystem. This second asynchronous transfer eliminates any traces of jitter that accumulate as the data is transferred between the USB and conversion subsystems. No traces of jitter-induced distortion are measurable to our measurement limits (better than -150 dBFS). This truly represents the state-of-the art. Enjoy the convenience of computer playback without compromise. The Asynchronous USB system supports USB Audio 2.0 for high-resolution 192kHz, and DSD playback. No drivers are required for MAC operating systems. An easy-to-install driver adds 192 kHz and DSD capabilities to Windows operating systems.

An asynchronous, driverless USB Audio 1.1 mode supports sample rates up to 96 kHz. This USB mode can be selected from the front panel or from the remote control. The driverless USB Audio 1.1 mode allows quick plug-and-play connections to Windows, MAC, iOS, and Linux operating systems without installing drivers. Just plug in the USB, and the DAC3 becomes an available audio device.

The USB subsystem remains active when the DAC3 is powered down. This prevents interruptions to the computer playback operations and eliminates the need to reconfigure the computer every time the converter is turned on.

QUAD 32-BIT BALANCED CONVERSION SYSTEM

Four balanced 32-bit D/A converters deliver audio to Benchmark's low-impedance current to voltage converters. The 4:1 redundancy reduces noise and distortion to levels that set new benchmarks. The conversion system at the core of the DAC3 is as good as it gets. The analog circuits that follow the D/A converter are carefully designed. Benchmark has leveraged its long history of building high-end analog audio equipment, in order to create an outstanding output stage.

The conversion system in the DAC3 achieves a 6 dB signal to noise improvement through the use of 4:1 summing. The ES9028PRO D/A is an 8-channel 32-bit converter. In the DAC3, four channels are summed in the analog domain to form each of the two output channels.

The 4:1 summing also improves the THD. The non-linearities in individual conversion channels are averaged across the four summed channels and incoherent non-linearities are attenuated by 6 dB.

DIAGNOSTIC TOOLS - SAMPLE-RATE AND WORD-LENGTH INDICATORS

Ever wonder why that 192 kHz 24-bit download on your computer just doesn't sound right? Your media player may be down-sampling to 44.1 kHz and/or truncating to 16-bits. Many computers and media players apply poor-quality sample rate conversion and truncation. Fortunately these problems can be eliminated with the selection a good frequency-agile media player. The sample-rate and word-length displays on the DAC3 confirm the proper operation of your media player.

POLARITY SWITCH

You may encounter recordings with inverted polarity. The DAC3 HGC and DAC3 L include a polarity switch to correct the problem.

HOME THEATER BYPASS

The DAC3 can be integrated into a home theater system. Typically the DAC3 drives the left and right power amplifiers, and an analog feed from the home theater system is connected to either of the analog inputs on the DAC3. A programmable Home Theater Bypass function sets the pass-through gain to unity when the surround system is active. The DAC3 HGC and DAC3 L include an indicator light that is illuminated when bypass is active.

DIGITAL PASS THROUGH

The second coaxial input on the DAC3 can be reconfigured as a digital output. In output mode, any selected digital input (including USB) will pass through to the coaxial output. The digital pass through is bit-transparent and even supports DSD (DoP 1.1). Dolby digital and DTS formats can also be passed through to a surround processor.

BI-DIRECTIONAL 12 VOLT TRIGGER

Benchmark re-invents the 12 volt trigger. The trigger connection on the DAC2 can be used as an input, an output, or both. It is compatible with any common 12 volt trigger input or output. The trigger can be used to turn a power amplifier on or off automatically. The DAC3 will also respond to a 12 volt trigger to follow the actions of another audio component.

POWER SWITCH

The power switch can place the DAC3 in standby, or full shut down. In full shut down, the unit will still respond to the trigger input and the IR remote control. Power consumption is less than 0.5 W in full shut down.

LOW POWER CONSUMPTION

The DAC3 uses high-efficiency low noise power supplies and may be operated from any standard international voltage without adjustment. Power consumption is 12 W typical.

DISTRIBUTED POWER REGULATION

To achieve the lowest possible noise, the DAC3 uses distributed power supply regulation. Each critical subsystem has at least one dedicated low-noise voltage regulator.

HPA2™ HEADPHONE POWER AMPLIFIER

The DAC3 features the HPA2™ - Benchmark's signature high-current, 0-Ohm headphone power amplifier. The HPA2™ is arguably the ultimate reference headphone power amplifier. It will deliver the full rated performance of the DAC3 to the headphones. The DAC3 has two 1/4" headphone jacks on the front panel. The performance of the HPA2™ remains consistent even when two headphones are being driven simultaneously.

AUDIO PERFORMANCE

Fs = 44.1 to 96 kHz, 20 to 20 kHz BW, 1 kHz test tone, 0 dBFS = +24 dBu (unless noted)

SNR – A-Weighted, 0 dBFS = +27 dBu

128 dB

SNR – Unweighted, 0 dBFS = +27 dBu

126 dB

THD+N, 1 kHz at 0 dBFS

-113 dBFS, -113 dB, 0.00022%

THD+N, 1 kHz at -1 dBFS

-114 dBFS, -113 dB, 0.00022%

THD+N, 1 kHz at –3 dBFS

-119 dBFS, -116 dB, 0.00016%

THD+N, 20 to 20 kHz test tone at –3 dBFS

-113 dBFS, -110 dB, 0.00032%

Frequency Response at Fs=192 kHz

+0 dB, -0.015 dB (20 to 20 kHz)

-0.015 dB at 10 Hz

-0.005 dB at 20 kHz

-0.031 dB at 40 kHz

-0.15 dB at 80 kHz

Frequency Response at Fs=48 kHz

+0 dB, -0.015 dB (20 to 20 kHz)

-0.015 dB at 10 Hz

-0.005 dB at 20 kHz

Crosstalk

-137 dB at 20 Hz

-130 dB at 1 kHz

-116 dB at 20 kHz

Maximum Amplitude of Jitter Induced Sidebands (10 kHz 0 dBFS test tone, 12.75 UI sinusoidal jitter at 1 kHz)

< -144 dB

Maximum Amplitude of Spurious Tones with 0 dBFS test signal

< -138 dB

Maximum Amplitude of Idle Tones

< -147 dB

Maximum Amplitude of AC line related Hum & Noise

< -133 dB

Inter-channel Differential Phase (Stereo Pair – any sample rate)

+/- 0.25 degrees at 20 kHz

Inter-channel Differential Phase (Between DAC3 Units Fs<110 kHz) Any sample rate.

+/- 0.25 degrees at 20 kHz

Maximum Lock Time after Fs change

6 ms

Soft Mute Ramp Up/Down Time

9.6 ms

Mute on Receive Error

Yes

Mute on Lock Error

Yes

Mute on Idle Channel

No

50/15 us De-Emphasis Enable

Automatic in Consumer Mode

De-Emphasis Method

Digital IIR

De-Emphasis Supported at

Fs = 32, 44.1, 48 kHz


GROUP DELAY (LATENCY)

Delay – Digital Input to Analog Output (function of sample rate)

1.36 ms at 44.1 kHz

1.27 ms at 48 kHz

0.90 ms at 88.2 kHz

0.82 ms at 96 kHz

0.51 ms at 176.4 kHz

0.47 ms at 192 kHz


DIGITAL AUDIO INPUTS

Number of Digital Inputs (switch selected)

5 (1 USB, 2 Optical, 2 Coaxial)

Number of Channels

2

Input Sample Frequency Range

28 to 210 kHz (Coaxial Inputs)

28 to 96 kHz (Optical Inputs)

44.1, 48, 88.2, 96, 176.4, 192 kHz (USB Input)

Maximum Input Word Length

24 bits

Digital Input Impedance

75 Ohms (Coaxial Inputs)

DC Blocking Capacitors on Digital Inputs

Yes (Coaxial Inputs)

Transient and Over-Voltage Protection on Digital Inputs

Yes (Coaxial Inputs)

Minimum Digital Input Level

250 mVpp (Coaxial Inputs)

Jitter Tolerance

(With no Measurable Change in Performance)

>12.75 UI sine, 100 Hz to 3 kHz

>1.5 UI sine at 20 kHz

>1.5 UI sine at 40 kHz

>1.5 UI sine at 80 kHz

>1.5 UI sine at 90 kHz

>0.25 UI sine above 160 kHz

Jitter Attenuation Method

Benchmark UltraLock3™ - all inputs


BALANCED ANALOG OUTPUTS

Number of Balanced Analog Outputs

2

Output Connector

Gold-Pin Neutrik™ male XLR

Output Impedance

60 Ohms (Attenuator off)

425 Ohms (Attenuator = 10 dB)

135 Ohms (Attenuator = 20 dB)

Analog Output Clip Point

+30 dBu

Factory Set Bypass Level (at 0 dBFS)

+24 dBu (Attenuator = 0 dB)

Output Level Range (at 0 dBFS) In ‘Variable’ Mode

Off to +27.5 dBu (Attenuator off)

Off to +17.5 dBu (Attenuator = 10 dB)

Off to +7.5 dBu (Attenuator = 20 dB)

Output Level Variation with Sample Rate (44.1 kHz vs. 96 kHz)

< +/- 0.006 dB


UNBALANCED ANALOG OUTPUTS

Number of Unbalanced Analog Outputs

4

Output Connector

RCA

Output Impedance

30 Ohms

Analog Output Clip Point

+13.5 dBu (3.7 Vrms)

Factory Set Home Theater Bypass Output Level (at 0 dBFS)

+8.2 dBu (2 Vrms)

Output Level Range (with 0 dBFS digital input)

Off to +11.7 dBu (3 Vrms)

Output Level Variation with Sample Rate

< +/- 0.006 dB


HPA2TM HEADPHONE OUTPUTS

Number of Headphone Outputs

2

Output Connectors

¼” TRS with switch on left-hand jack

Output Impedance

< 0.11 Ohms

Output Level Control

Stereo Control on Front Panel

Output Level Range (at 0 dBFS) into 60-Ohm Load

Off to +21.5 dBu (9.2 Vrms)

Output Power 1.25 W into 30 Ohms

Maximum Output Current

250 mA

Overload Protection (independent per channel)

Current limited at 300 mA, Thermal

Bandwidth

> 500 kHz, -0.35 dB at 200 kHz

THD+N at 20 mW

-108 dB (0.0004%) into 300 Ohms, -100 dB (0.0010%) into 30 Ohms


STATUS DISPLAY

Indicators - Type and Location

16 LED’s on Front Panel

Selection/Status Indication

1 – Dim/Mute

1 - Polarity
6 – Input
2 – Bypass/Calibrated Output
2 – Word length
4 – Sample Rate




AC POWER REQUIREMENTS

Nominal Input Operating Voltage Range (VAC RMS)

100 – 240V

Frequency

50-60 Hz

Power

< 0.5 Watts Idle
12 Watts Typical Program
15 Watts Maximum

Fuses

5 x 20 mm (2 required)
0.5 A 250 V Slo-Blo® Type

Min/Max Operating range (VAC RMS)

90 – 260 VAC
47 – 63 Hz


DIMENSIONS

Form Factor

½ Rack Wide, 1 RU High

Depth behind front panel

8.5” (216 mm)

Overall depth including connectors but without power cord

9.33” (237 mm)

Width

9.5” (249 mm)

Height

1.725” (44.5 mm)


WEIGHT

DAC3 only

3 lb.

DAC3 with remote control, power cord, extra fuses, and manual

4 lb.

Shipping weight

7 lb.


IMPORTANT FEATURES

  • Sample Rate Display
  • Word Length Display
  • 5 Digital Inputs
  • 2 Stereo Analog Inputs (2 RCA)
  • 3 Stereo Analog Outputs (2 RCA, 1 XLR)
  • Digital Pass Through
  • Native DSD Conversion
  • Polarity Switch
  • Asynchronous USB 2.0
  • Driverless Asynchronous USB 1.1
  • Home Theater Bypass
  • Bi-Directional 12 Volt Trigger
  • Power Switch
  • Low Power Consumption
  • ES9028PRO Converter
BENCHMARK DAC3 HGC - DIGITAL TO ANALOG AUDIO CONVERTER
฿86,000
A NEW REFERENCE - GOING BEYOND THE LEGENDARY DAC1 AND DAC2 The DAC3 is Benchmark's newest 2-channel D/A converter featuring the new ESS Technologies ES9028PRO converter chip...
฿86,000

Available Options

BENCHMARK DAC3 L - DIGITAL TO ANALOG AUDIO CONVERTER

xxx แบรนด์: BENCHMARK

รหัสสินค้า: BENCHMARK DAC3 L - DIGITAL TO ANALOG AUDIO CONVERTER

฿74,300

A NEW REFERENCE - GOING BEYOND THE LEGENDARY DAC1 AND DAC2

The DAC3 is Benchmark's newest 2-channel D/A converter featuring the newESS Technologies ES9028PRO converter chip. The DAC3 converter has lower THD and THD+N noise than Benchmark's DAC2 converter.

Benchmark's DAC1 and DAC2 D/A converter families have been the reference to which other converters have been compared. It is rare to find a converter review that does not draw comparisons to the DAC1 or the DAC2. Benchmark converters are in daily use at many of the world's finest recording studios and mastering rooms. Benchmark converters are also enjoyed by thousands of audiophiles. Benchmark has raised the bar again ... the DAC3 defines a new reference.

REFERENCE PERFORMANCE

The DAC3 delivers outstanding musical detail and precise stereo imaging. It employs an advanced high-headroom digital filter design, and a high-sample-rate Asynchronous USB Audio interface. All inputs are fully isolated from interface jitter by Benchmark's new UltraLock3™ jitter attenuation system.

Internal digital processing and conversion is 32-bits, and this processing includes 3.5 dB of headroom above 0 dBFS. This headroom prevents the DSP overloads that commonly occur in other D/A converters.

Four balanced 32-bit D/A converters are summed together to create each balanced analog output. This 4:1 summation provides a 6 dB noise reduction, and gives the DAC3 industry-leading performance.

DAC3 VS. DAC2

The DAC3builds upon Benchmark’s highly successful DAC2 product family. The DAC3 maintains the familiar DAC2 form factor and feature set, but adds the higher performance available from the new ES9028PRO D/A converter. The DAC3 offers the following improvements over the DAC2:

  • Active 2nd Harmonic Compensation
  • Active 3rd Harmonic Compensation
  • Lower THD+N
  • Lower passband ripple
  • Improved frequency response
  • Faster PLL lock times
  • Faster switching between input signals

DAC3 VS. DAC1

The DAC3 and DAC2 added these features that were not found on the DAC1:

  • Asynchronous 192kHz USB Audio 2.0
  • 32-bit D/A conversion system
  • Word Length Display
  • Sample Rate Display
  • Polarity Control
  • Direct DSD D/A Conversion
  • -20 dB DIM
  • Bi-Directional 12V Trigger
  • Power Switch with Auto-On Function
  • Home Theater Bypass
  • Digital Pass-Through
  • High-Headroom DSP
  • Dual-Domain Hybrid Gain Control
  • Additional I/O

NATIVE DSD CONVERSION

All digital inputs on the DAC3 support native PCM or DSD conversion. From any input, DSD is transported with bit accuracy over DoP 1.1. DSD and PCM are both natively converted to analog. There are no DSD to PCM or PCM to DSD conversions to compromise the quality of the music. The DAC3 conversion system seamlessly switches between native PCM and native DSD conversion. DSD over DoP 1.1 is supported by many media players, and DSD downloads are now available from several sources.

DIRECT CONNECTIVITY TO POWER AMPLIFIERS

Benchmark DAC1DAC2, and DAC3 converters are designed to directly drive power amplifiers and speakers. Benchmark converters feature adjustable low-impedance passive attenuators at the XLR outputs that can be used to optimize the interface to the power amplifier (or powered monitor). This unique Benchmark feature optimizes the gain staging between the DAC and the power amplifier. Proper gain staging cannot be overemphasised. When audio stages are properly matched, each component in the audio chain is able to operate at its optimum signal level, and the system performance is significantly improved.

SONICALLY-NEUTRAL STUDIO MONITORING

All Benchmark converters are designed for maximum transparency. This transparency is absolutely essential in the studio monitoring chain. For this reason, DAC3 converters are ideal for critical reference-quality professional systems. Unlike many competing products, the DAC3 is not designed to add "euphonic" coloration to the audio. Instead it is designed to be as uncolored and natural as possible.

STEP INTO THE STUDIO

When Benchmark's professional converters are used in hi-fi applications, studio-quality sound can be enjoyed in a home environment. Enjoy pure music without any coloration from the electronics. Hear the music exactly the way it was heard in the studio, and exactly the way the artists intended.

Discover the natural, uncolored, analog sound of the DAC3.

SIT IN THE PERFORMANCE SPACE

Transparent sound can go beyond replicating the studio experience. Recordings that have been produced with a natural and unprocessed sound can transport you to the performance space. But, this can only happen when the entire playback chain is selected for maximum transparency.

This experience of "being there" cannot be created by systems that are designed to add "warmth" or "euphonic color" to the music. 

DAC3 TECHNOLOGIES

  • Harmonic Compensation
  • Hybrid Gain Control
  • UltraLock3™ Jitter Attenuation System
  • High-Headroom DSP
  • Multi-Mode Asynchronous USB Audio System
  • Quad 32-bit balanced D/A Conversion System
  • Distributed Power Regulation

HARMONIC COMPENSATION

The ES9028PRO has two distortion compensation systems that independently remove most of the 2nd and 3rd harmonic distortion in the D/A converter. Benchmark's ultra-clean analog output stages allow these systems to be fully leveraged in the DAC3. To the best of our knowledge, no other D/A converter has lower THD than the Benchmark DAC3.

HYBRID GAIN CONTROL

"HGC" is Benchmark's unique Hybrid Gain Control system. The DAC3 combines active analog gain control, passive low-impedance attenuators, a 32-bit digital gain control, and a servo-driven volume control. All inputs are controlled by the rotary volume control. This volume control moves in response to commands from the remote control. Analog inputs are never converted to digital, and digital inputs never pass through an analog potentiometer. Digital inputs are precisely controlled in the 32-bit DSP system. The DSP system preserves precise L/R balance, and precise stereo imaging, while avoiding any source of noise and distortion.

Benchmark's unique passive output attenuators provide distortion-free gain reduction without reducing the dynamic range of the converter. The attenuators optimize the gain staging between the DAC3 and the power amplifier. This optimization is absolutely essential for maximizing the dynamic range of the entire playback system. Much of the success of the DAC1 and DAC2 converters can be attributed to the passive output attenuators. Musical details can be obscured by system noise whenever a preamplifier and power amplifier are improperly matched. The" HGC " system will make full use of your power amplifier's dynamic range. Experience new details in your favorite recordings.

ULTRALOCK3™ JITTER ATTENUATION SYSTEM

UltraLock3™ is an improved version of the UltraLock2™ system used in the DAC2 product family. UltraLock3™ locks with precise phase accuracy in only 6 ms. In contrast, the UltraLock2™ system required 400 ms. Both UltraLock™ systems provide virtually perfect jitter attenuation, but the the lightning-fast lock time of the new UltraLock3™ will be appreciated by many of our users.

DSP processing is 32-bits, DSP headroom is 3.5 dB, sample rate is 211 kHz, and jitter-induced distortion and noise is at least 140 dB below the level of the music - well below the threshold of hearing. Benchmark's UltraLock3™ system eliminates all audible jitter artifacts.

HIGH HEADROOM DSP - WITH 3.5 DB "EXCESS" DIGITAL HEADROOM

All of the digital processing in the DAC3 is designed to handle signals as high as +3.5 dBFS. Most digital systems clip signals that exceed 0 dBFS. The 0 dBFS limitation seems reasonable, as 0 dBFS is the highest sinusoidal signal level that can be represented in a digital system. However, a detailed investigation of the mathematics of PCM digital systems will reveal that inter-sample peaks may reach levels slightly higher than +3 dBFS while individual samples never exceed 0 dBFS. These inter-sample overs are common in commercial releases, and are of no consequence in a PCM system until they reach an interpolation process. But, for a variety of reasons, virtually all audio D/A converters use an interpolation process. The interpolation process is absolutely necessary to achieve 24-bit state-of-the art conversion performance. Unfortunately, inter-sample overs cause clipping in most interpolators. This clipping produces distortion products that are non-harmonic and non-musical . We believe these broadband distortion products often add a harshness or false high-frequency sparkle to digital reproduction. The DAC3 avoids these problems by maintaining at least 3.5 dB of headroom in the entire conversion system. We believe this added headroom is a groundbreaking improvement.

MULTI-MODE ASYNCHRONOUS USB SYSTEM

Benchmark's USB system supports USB Audio 2.0, DSD, and USB Audio 1.1. It is frequency agile, and will follow sample rate changes initiated by the computer and/or the media playback software. In all modes the USB communications are asynchronous in order to eliminate unnecessary sources of jitter.

The DAC3 has a low-jitter master clock which controls the transfer of audio data from the computer to the USB sub-system. The computer asynchronously transfers audio data to a buffer in the DAC3. The contents of the buffer are then asynchronously transferred to the D/A conversion subsystem. This second asynchronous transfer eliminates any traces of jitter that accumulate as the data is transferred between the USB and conversion subsystems. No traces of jitter-induced distortion are measurable to our measurement limits (better than -150 dBFS). This truly represents the state-of-the art. Enjoy the convenience of computer playback without compromise. The Asynchronous USB system supports USB Audio 2.0 for high-resolution 192kHz, and DSD playback. No drivers are required for MAC operating systems. An easy-to-install driver adds 192 kHz and DSD capabilities to Windows operating systems.

An asynchronous, driverless USB Audio 1.1 mode supports sample rates up to 96 kHz. This USB mode can be selected from the front panel or from the remote control. The driverless USB Audio 1.1 mode allows quick plug-and-play connections to Windows, MAC, iOS, and Linux operating systems without installing drivers. Just plug in the USB, and the DAC3 becomes an available audio device.

The USB subsystem remains active when the DAC3 is powered down. This prevents interruptions to the computer playback operations and eliminates the need to reconfigure the computer every time the converter is turned on.

QUAD 32-BIT BALANCED CONVERSION SYSTEM

Four balanced 32-bit D/A converters deliver audio to Benchmark's low-impedance current to voltage converters. The 4:1 redundancy reduces noise and distortion to levels that set new benchmarks. The conversion system at the core of the DAC3 is as good as it gets. The analog circuits that follow the D/A converter are carefully designed. Benchmark has leveraged its long history of building high-end analog audio equipment, in order to create an outstanding output stage.

The conversion system in the DAC3 achieves a 6 dB signal to noise improvement through the use of 4:1 summing. The ES9028PRO D/A is an 8-channel 32-bit converter. In the DAC3, four channels are summed in the analog domain to form each of the two output channels.

The 4:1 summing also improves the THD. The non-linearities in individual conversion channels are averaged across the four summed channels and incoherent non-linearities are attenuated by 6 dB.

DIAGNOSTIC TOOLS - SAMPLE-RATE AND WORD-LENGTH INDICATORS

Ever wonder why that 192 kHz 24-bit download on your computer just doesn't sound right? Your media player may be down-sampling to 44.1 kHz and/or truncating to 16-bits. Many computers and media players apply poor-quality sample rate conversion and truncation. Fortunately these problems can be eliminated with the selection a good frequency-agile media player. The sample-rate and word-length displays on the DAC3 confirm the proper operation of your media player.

POLARITY SWITCH

You may encounter recordings with inverted polarity. The DAC3 HGC and DAC3 L include a polarity switch to correct the problem.

HOME THEATER BYPASS

The DAC3 can be integrated into a home theater system. Typically the DAC3 drives the left and right power amplifiers, and an analog feed from the home theater system is connected to either of the analog inputs on the DAC3. A programmable Home Theater Bypass function sets the pass-through gain to unity when the surround system is active. The DAC3 HGC and DAC3 L include an indicator light that is illuminated when bypass is active.

DIGITAL PASS THROUGH

The second coaxial input on the DAC3 can be reconfigured as a digital output. In output mode, any selected digital input (including USB) will pass through to the coaxial output. The digital pass through is bit-transparent and even supports DSD (DoP 1.1). Dolby digital and DTS formats can also be passed through to a surround processor.

BI-DIRECTIONAL 12 VOLT TRIGGER

Benchmark re-invents the 12 volt trigger. The trigger connection on the DAC2 can be used as an input, an output, or both. It is compatible with any common 12 volt trigger input or output. The trigger can be used to turn a power amplifier on or off automatically. The DAC3 will also respond to a 12 volt trigger to follow the actions of another audio component.

POWER SWITCH

The power switch can place the DAC3 in standby, or full shut down. In full shut down, the unit will still respond to the trigger input and the IR remote control. Power consumption is less than 0.5 W in full shut down.

LOW POWER CONSUMPTION

The DAC3 uses high-efficiency low noise power supplies and may be operated from any standard international voltage without adjustment. Power consumption is 12 W typical.

DISTRIBUTED POWER REGULATION

To achieve the lowest possible noise, the DAC3 uses distributed power supply regulation. Each critical subsystem has at least one dedicated low-noise voltage regulator.

AUDIO PERFORMANCE

Fs = 44.1 to 96 kHz, 20 to 20 kHz BW, 1 kHz test tone, 0 dBFS = +24 dBu (unless noted)

SNR – A-Weighted, 0 dBFS = +27 dBu

128 dB

SNR – Unweighted, 0 dBFS = +27 dBu

126 dB

THD+N, 1 kHz at 0 dBFS

-113 dBFS, -113 dB, 0.00022%

THD+N, 1 kHz at -1 dBFS

-114 dBFS, -113 dB, 0.00022%

THD+N, 1 kHz at –3 dBFS

-119 dBFS, -116 dB, 0.00016%

THD+N, 20 to 20 kHz test tone at –3 dBFS

-113 dBFS, -110 dB, 0.00032%

Frequency Response at Fs=192 kHz

+0 dB, -0.015 dB (20 to 20 kHz)

-0.015 dB at 10 Hz

-0.005 dB at 20 kHz

-0.031 dB at 40 kHz

-0.15 dB at 80 kHz

Frequency Response at Fs=48 kHz

+0 dB, -0.015 dB (20 to 20 kHz)

-0.015 dB at 10 Hz

-0.005 dB at 20 kHz

Crosstalk

-137 dB at 20 Hz

-130 dB at 1 kHz

-116 dB at 20 kHz

Maximum Amplitude of Jitter Induced Sidebands (10 kHz 0 dBFS test tone, 12.75 UI sinusoidal jitter at 1 kHz)

< -144 dB

Maximum Amplitude of Spurious Tones with 0 dBFS test signal

< -138 dB

Maximum Amplitude of Idle Tones

< -147 dB

Maximum Amplitude of AC line related Hum & Noise

< -133 dB

Inter-channel Differential Phase (Stereo Pair – any sample rate)

+/- 0.25 degrees at 20 kHz

Inter-channel Differential Phase (Between DAC3 Units Fs<110 kHz) Any sample rate.

+/- 0.25 degrees at 20 kHz

Maximum Lock Time after Fs change

6 ms

Soft Mute Ramp Up/Down Time

9.6 ms

Mute on Receive Error

Yes

Mute on Lock Error

Yes

Mute on Idle Channel

No

50/15 us De-Emphasis Enable

Automatic in Consumer Mode

De-Emphasis Method

Digital IIR

De-Emphasis Supported at

Fs = 32, 44.1, 48 kHz


GROUP DELAY (LATENCY)

Delay – Digital Input to Analog Output (function of sample rate)

1.36 ms at 44.1 kHz

1.27 ms at 48 kHz

0.90 ms at 88.2 kHz

0.82 ms at 96 kHz

0.51 ms at 176.4 kHz

0.47 ms at 192 kHz


DIGITAL AUDIO INPUTS

Number of Digital Inputs (switch selected)

5 (1 USB, 2 Optical, 2 Coaxial)

Number of Channels

2

Input Sample Frequency Range

28 to 210 kHz (Coaxial Inputs)

28 to 96 kHz (Optical Inputs)

44.1, 48, 88.2, 96, 176.4, 192 kHz (USB Input)

Maximum Input Word Length

24 bits

Digital Input Impedance

75 Ohms (Coaxial Inputs)

DC Blocking Capacitors on Digital Inputs

Yes (Coaxial Inputs)

Transient and Over-Voltage Protection on Digital Inputs

Yes (Coaxial Inputs)

Minimum Digital Input Level

250 mVpp (Coaxial Inputs)

Jitter Tolerance

(With no Measurable Change in Performance)

>12.75 UI sine, 100 Hz to 3 kHz

>1.5 UI sine at 20 kHz

>1.5 UI sine at 40 kHz

>1.5 UI sine at 80 kHz

>1.5 UI sine at 90 kHz

>0.25 UI sine above 160 kHz

Jitter Attenuation Method

Benchmark UltraLock3™ - all inputs


BALANCED ANALOG OUTPUTS

Number of Balanced Analog Outputs

2

Output Connector

Gold-Pin Neutrik™ male XLR

Output Impedance

60 Ohms (Attenuator off)

425 Ohms (Attenuator = 10 dB)

135 Ohms (Attenuator = 20 dB)

Analog Output Clip Point

+30 dBu

Factory Set Bypass Level (at 0 dBFS)

+24 dBu (Attenuator = 0 dB)

Output Level Range (at 0 dBFS) In ‘Variable’ Mode

Off to +27.5 dBu (Attenuator off)

Off to +17.5 dBu (Attenuator = 10 dB)

Off to +7.5 dBu (Attenuator = 20 dB)

Output Level Variation with Sample Rate (44.1 kHz vs. 96 kHz)

< +/- 0.006 dB


UNBALANCED ANALOG OUTPUTS

Number of Unbalanced Analog Outputs

4

Output Connector

RCA

Output Impedance

30 Ohms

Analog Output Clip Point

+13.5 dBu (3.7 Vrms)

Factory Set Home Theater Bypass Output Level (at 0 dBFS)

+8.2 dBu (2 Vrms)

Output Level Range (with 0 dBFS digital input)

Off to +11.7 dBu (3 Vrms)

Output Level Variation with Sample Rate

< +/- 0.006 dB


STATUS DISPLAY

Indicators - Type and Location

16 LED’s on Front Panel

Selection/Status Indication

1 – Dim/Mute

1 - Polarity
6 – Input
2 – Bypass/Calibrated Output
2 – Word length
4 – Sample Rate




AC POWER REQUIREMENTS

Nominal Input Operating Voltage Range (VAC RMS)

100 – 240V

Frequency

50-60 Hz

Power

< 0.5 Watts Idle
12 Watts Typical Program
15 Watts Maximum

Fuses

5 x 20 mm (2 required)
0.5 A 250 V Slo-Blo® Type

Min/Max Operating range (VAC RMS)

90 – 260 VAC
47 – 63 Hz


DIMENSIONS

Form Factor

½ Rack Wide, 1 RU High

Depth behind front panel

8.5” (216 mm)

Overall depth including connectors but without power cord

9.33” (237 mm)

Width

9.5” (249 mm)

Height

1.725” (44.5 mm)


WEIGHT

DAC3 only

3 lb.

DAC3 with remote control, power cord, extra fuses, and manual

4 lb.

Shipping weight

7 lb.


IMPORTANT FEATURES

  • Sample Rate Display
  • Word Length Display
  • 5 Digital Inputs
  • 2 Stereo Analog Inputs (2 RCA)
  • 3 Stereo Analog Outputs (2 RCA, 1 XLR)
  • Digital Pass Through
  • Native DSD Conversion
  • Polarity Switch
  • Asynchronous USB 2.0
  • Driverless Asynchronous USB 1.1
  • Home Theater Bypass
  • Bi-Directional 12 Volt Trigger
  • Power Switch
  • Low Power Consumption
  • ES9028PRO Converter
BENCHMARK DAC3 L - DIGITAL TO ANALOG AUDIO CONVERTER
฿74,300
A NEW REFERENCE - GOING BEYOND THE LEGENDARY DAC1 AND DAC2 The DAC3 is Benchmark's newest 2-channel D/A converter featuring the newESS Technologies ES9028PRO converter chip.&..
฿74,300

FiiO - D03K Digital Audio Analog Converter

xxx แบรนด์: Fiio

รหัสสินค้า: FiiO - D03K Digital Audio Analog Converter

฿950

สำหรับเจ้า FiiO D03K นี้ก็คือกล่องแปลงสัญญาณจาก Digital เป็น Analog นั่นเองครับ
หลายๆคนรู้จักกันดีเพราะส่วนมากจะซ์้อไปต่อกับอุปกรณ์อย่าง TV , LCD , LED , PLASMA , เครื่องเสียง , Home Theater ได้นั่นเอง หน้าที่ของ FiiO D07นั้นก็คือตัวแปลงจากสาย Coaxial , Optical ให้สามารถมาใช้สาย RCA (ขาวแดง) หรือแจ๊กหูฟัง 3.5mm ได้นั่นเอง นอกจากสามารถแปลงสัญญาณได้แล้ว เจ้า FiiO D03K นั้นยังทำหน้าที่เป็น DAC (Digital to Analog Converter) ซึ่งทำให้มีคุณภาพเสียงดีขึ้นได้อีกด้วย (เทียบง่ายๆ Dac นี่ก็เหมือน Soundcard ของพวก Computer นั่นเองครับ นอกจากนั้นเจ้า FiiO D03K ยังรองรับเสียงระดับ High Quality ได้สูงสุดถึง 96khz อีกด้วยเลยทีเดียว
ซึ่ง Dac นั้นนอกจากเป็นตัวถอดรหัสแล้ว ยังทำให้เสียงที่ออกมานั้นมีคุณภาพเสียงที่ดี และ ดังขึ้นอีกด้วย
แน่นอนครับว่าเจ้า FiiO D03Kนั้นสามารถแก้ปัญหาทีวีสมัยใหม่ไม่มีช่อง RCA (ขาวแดง) ได้ด้วยนั่นเอง

เพราะเจ้า FiiO D03K นั้นต่อผ่าน Coaxial และ Optical นั้นจะทำให้ได้คุณภาพเสียงรองรับละเอียดสูงถึง 192Khz/24bit เลยทีเดียวการนำไปใช้งานก็ใช้งานได้หลากหลายประเภท ทั้งกับ TV , HD Player , กล่องรับสัญญาณดาวเทียม, เครื่องเล่น DVD,

FiiO - D03K Digital Audio Analog Converter
฿950
สำหรับเจ้า FiiO D03K นี้ก็คือกล่องแปลงสัญญาณจาก Digital เป็น Analog นั่นเองครับหลายๆคนรู้จักกันดีเพราะส่วนมากจะซ์้อไปต่อกับอุปกรณ์อย่าง TV , LCD , LED , PLASMA , เครื่องเสียง , Home Theater ได้นั..
฿950
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