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POWER AMPLIFIERS

POWER AMPLIFIERS

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BENCHMARK AHB2 POWER AMPLIFIER

xxx แบรนด์: BENCHMARK

รหัสสินค้า: BENCHMARK AHB2 POWER AMPLIFIER

฿118,900

THE QUIETEST, CLEANEST AUDIO AMPLIFIER ON THE PLANET

From the first watt to the last watt, no audio power amplifier offers lower noise or lower distortion than the Benchmark AHB2.Benchmark has raised the bar by introducing a new and revolutionary amplifier!

“I measured less distortion and noise in the AHB2 than in any other of the many power amps I've measured over the years.”

-Bascom King, BHK Labs

“If ever there were a giant-killer of an amp, this is it.”

"It is one of the -- if not the -- quietest, most resolving amps I've heard. Time and again, without ever having intended to, I wound up hours deep in listening to the fringes of my music collection, thanks to the AHB2’s reference-level transparency and obscene athleticism."

- Hans Wetzel, SoundStage!

"Benchmark Media Systems' AHB2 is an extraordinary amplifier. Not only does its performance lie at the limits of what is possible for me to reliably test, it packs high power into a very small package, especially when used in bridged-mono mode. It is truly a high-resolution amplifier."

- John Atkinson, Stereophile

TRUE HIGH-RESOLUTION PERFORMANCE 

The AHB2 is the ideal match to the performance limits of High-Resolution-Audio (HRA) formats. Benchmark's AHB2 power amplifier delivers musical details without introducing the masking effects of amplifier noise and distortion. The dynamic range of the AHB2 is 132 dB, making it 10 to 30 dB quieter than some of the very best reference-quality power amplifiers.

The frequency response of the AHB2 extends beyond 200 kHz. With the AHB2, you will discover previously overlooked nuances, dynamics, and detail in your favorite recordings and experience the full potential of the latest high-resolution 24-bit PCM and 1-bit DSD audio formats.

EXPERIENCE THE EMOTION

The musical details and emotion captured on today's finest High-Resolution-Audio recordings can only be fully appreciated when every component in the signal chain is capable of true high-resolution performance. Power amplifiers are a weak link in most audio systems. Most power amplifiers are well matched to the limitations of the CD format, but they fall well short of the capabilities of high-resolution formats. In contrast, the revolutionary AHB2 was specifically designed to deliver true high-resolution performance.

"Best Stereo Amplifier of 2017 ... masterfully detailed and transparent with spot-on tonality and some serious punch."

- Ben Shyman, Home Theater Review

FULFILLING THE NEED FOR BETTER AMPLIFICATION

D/A conversion technology has outpaced the development of new power amplifiers. This means that the power amplifier has become a limiting factor in many audio systems. For example, the noise and distortion produced by the Benchmark DAC3 D/A converter is 20 to 30 dB lower than that produced by most high-quality power amplifiers. Until now, this meant that the DAC3 could not be fully appreciated. Benchmark set out to solve this problem by creating an amplifier that matches the performance of the DAC3.

A RADICALLY DIFFERENT POWER AMPLIFIER

We had to look beyond existing amplifier technologies and explore some new and radical solutions. In our search, we learned of two new patents on a new amplifier technology from THX. This was exactly the technology we needed to build our new amplifier.

The AHB2 uses the new and revolutionary THX-patented AAA™ technology to virtually eliminate all forms of distortion. This technology uses feed-forward error correction to eliminate the distortion that is normally produced by the output stage. No other audio amplifier comes close to delivering the clean, quiet, and robust power of the AHB2.

DIFFICULT SPEAKER LOADS ARE HANDLED WITH EASE

Many loudspeakers have frequencies at which their impedance drops to levels that are much lower than the "nominal" impedance. The AHB2 drives difficult phase angles and low impedances with ease. Stereo loads as low as 1.4 Ohms can be cleanly driven to full output levels. Most power amplifiers produce higher levels of distortion when the load impedance decreases. In contrast, the feed-forward error correction system in the AHB2 keeps the output clean when driving difficult loads. The AHB2 produces almost no measurable distortion at any rated load condition.

In our quest to build the ultimate amplifier, we also focused on frequency response, output noise, drive current, damping factor, and reliability. The result is an amplifier that stands head and shoulders above the competition.

 

SONIC PURITY THAT SURPASSES CLASS A!

The AHB2is a linear amplifier that surpasses the sonic purity of all class-A amplifiers. No amplifier delivers lower noise or lower distortion. The small, passively cooled chassis, cleanly delivers 480 Watts bridged mono into 6 Ohms, with additional reserves for driving difficult speaker loads. Unlike power-hungry class-A amplifiers, the AHB2 achieves a power efficiency that rivals that of a Class D (switching) power amplifier.

DIFFICULT SPEAKER LOADS ARE HANDLED WITH EASE

Many loudspeakers have frequencies at which their impedance drops to levels that are much lower than the "nominal" impedance. The AHB2 drives difficult phase angles and low impedances with ease. Stereo loads as low as 1.4 Ohms can be cleanly driven to full output levels. Most power amplifiers produce higher levels of distortion when the load impedance decreases. In contrast, the feed-forward error correction system in the AHB2keeps the output clean when driving difficult loads. The AHB2 produces almost no measurable distortion at any rated load condition.

HIGH DAMPING FACTOR

The AHB2has a high damping factor that augments its extended low-end to deliver solid, well-controlled bass. This high damping factor also keeps the frequency response absolutely flat while driving speakers with large frequency-dependent impedance variations.

HIGH OUTPUT CURRENT

The AHB2can deliver up to 29 A peak to each channel simultaneously. This robust drive current easily handles some of the most demanding loudspeakers. The AHB2 has tightly regulated power supplies that keep the output clean while delivering high current.

DISTORTION IS BELOW AUDIBILITY

The AHB2 will never produce audible distortion. In most playback systems, the distortion produced by the AHB2 will never even reach the 0 dB SPL threshold of hearing. This means that the distortion could not be heard, even if it could be played while the music was muted.

The AHB2 allows you to escape the distortion limitations of classic amplifier topologies and enter the world of high-resolution audio playback.

"I very much enjoyed my time evaluating the Benchmark AHB2 amplifier and can heartily recommend it to those seeking one of the lowest distortion and lowest noise amplifiers on the planet—one that is very musically transparent and easy on the ears to boot."

- Frank Alles, Stereo Times

EXTREME PERFORMANCE OFTEN REQUIRES A RADICAL APPROACH

The AHB2 amplifier is radically different than traditional audio amplifiers. Two new THX-patented feed-forward error-correction technologies eliminate most sources of distortion. An unconventional power supply maintains tight regulation and low ripple while minimizing magnetic fields. A low-gain topology optimizes the gain staging between the D/A converter and the power amplifier while minimizing noise. Sophisticated shielding and star-quad signal distribution provide outstanding immunity to interference. A unique output stage incorporates class-H tracking power supply rails to improve efficiency. The result is that the cool-running AHB2 has a signal to noise ratio of 132 dB while distortion is at or below the measurement limits of the finest test equipment.

See John Siau's application note: "A Radical Approach to Power Amplification" for more details.

INTRODUCING THX ACHROMATIC AUDIO AMPLIFIER TECHNOLOGY™

The AHB2 is the only amplifier that leverages the patented THX-AAA Technology™. This patented system reduces distortion to vanishingly low levels while enabling several power-saving techniques.

"The Benchmark AHB2 is a powerful and efficient amplifier with prodigious low levels of noise and distortion. The fact that it is also very musical and non-fatiguing, courtesy of THX’s patented AAA Technology™, is the icing on the cake. Benchmark Media and THX have a lot to be proud of for the development and implementation of the new technology the AHB2 represents."

- Frank Alles, Stereo Times

BIPOLAR CLASS-AB OUTPUT STAGE

The AHB2 has a bipolar class-AB output stage that delivers high output current and low noise. The THX-AAATechnology™ provides accurate cancellation of zero-crossing errors, exceeding the performance of the best class-A amplifier.

FEED-FORWARD ERROR CORRECTION

Traditional class-AB amplifiers generate crossover distortion every time the push-pull output stage crosses 0 volts. This crossover distortion can be especially problematic at low playback levels.

In contrast, class-A amplifiers eliminate crossover distortion by keeping all output devices turned on at all times. This brute-force class-A approach solves the crossover distortion problem but it consumes lots of power while delivering very little to the speakers. The wasted power produces heat which must be dissipated into the listening space.

Class-A amplifiers eliminate crossover distortion but they suffer from high power consumption, poor damping, and limited output power. The AHB2 is the first amplifier to virtually eliminate crossover distortion without incurring the undesirable side effects of class-A amplification.

THE IMPORTANCE OF THE FIRST WATT

Dick Olsher once said that "the first Watt is the most important Watt". We agree! From the first Watt to the last Watt, the AHB2 shows no evidence of crossover distortion.

In contrast, all conventional class-AB amplifiers have crossover-distortion artifacts.Traditional class-AB designs attempt to control distortion through the use of feedback. Unfortunately, these feedback systems have a limited ability to reduce the abrupt transients that are caused by output device crossover transitions. Feedback networks attempt to correct errors afterthey occur. In contrast, feed-forward networks can prevent errors before they occur.

THX-AAA Technology™ includes an ultra-clean low-power error-correction amplifier that runs in parallel with the high-power main amplifier. The correction amplifier actively drives the output while the main output devices transition between push and pull states. Like a class-A amplifier, the AHB2 shows no signs of crossover distortion. The feed-forward system virtually eliminates the errors that would have been produced by the output devices in the main amplifier.

HIGH EFFICIENCY - GREEN NEVER SOUNDED SO GOOD!

The THX-patented feed-forward error correction used in the AHB2 is so effective that biasing of the class-AB bipolar output devices can be reduced to unusually low levels. Benchmark has chosen to maintain a small bias current in the output stage, but this bias current is not critical to the distortion performance of the unit. The benefit of low bias current is that very little power is wasted as heat when the amplifier is idle. The AHB2 only draws 12 W when idle, and less than 1/2 W in standby.

The feed-forward error correction also allows the use of class-H tracking power supply rails without the usual distortion-performance penalty. These tracking rails significantly improve the overall efficiency of the amplifier while the error correction keeps distortion nearly nonexistent. The AHB2 rivals the efficiency of class-D amplifiers while exceeding the sonic performance of power-hungry class-A designs. Green never sounded so good!

INNOVATIVE LOW-NOISE POWER SUPPLY

Most high-quality power amplifiers have linear power supplies, large toroidal transformers, and large banks of energy-storage capacitors. These linear supplies are usually unregulated and the capacitors help to remove ripple produced by the audio and by the AC line. In contrast, the AHB2 uses a tightly regulated resonant switching power supply that includes a very fast control loop. This control loop responds to audio-frequency load changes and keeps the supply voltage constant without the use of a large bank of capacitors. This active regulation is much more effective than capacitive energy-storage. Consequently, the peak power output of the AHB2 does not vary with line voltage or audio loading. The power supply rails maintain a constant voltage during audio peaks.

The power supply in the AHB2 switches at frequencies that are well above audible frequencies. This eliminates mechanical hum while significantly reducing the strength of stray magnetic fields. For a given amount of power, magnetic field strength decreases as switching frequency increases. The lower field strengths also provide a significant reduction in size. High-frequency transformers and coils are also much smaller than line-frequency components. This size reduction contributes to the small physical size of the AHB2.

The switching power supply used in the AHB2 is a zero-voltage switching, resonant power converter. This means that the power devices in the supply switch near zero voltage and zero current, eliminating the large switching transients produced by conventional switching power supplies. The power supply in the AHB2 is actually much cleaner and quieter than a conventional linear supply. 

The power supply In the AHB2 is well over 90% efficient, much more efficient than linear supplies. This means that little power is lost to heat.

PASSIVE COOLING

The power-efficient AHB2 uses passive heat sinks to maintain cool operation. The AHB2 delivers high power without the need for fans. The unit runs cool, even when playing audio at full output levels. The absence of fan noise is absolutely essential in a high-resolution listening environment.

LOW-NOISE INPUT AMPLIFIERS

The precision balanced inputs on the AHB2 are equipped with low-noise input amplifiers. Benchmark considers balanced inputs essential in a true high-resolution system. If balanced sources are not available, Benchmark sells unbalanced to balanced adapter cables that extend a 3-wire balanced connection back to the unbalanced source connectors. These adapter cables provide many of the advantages of fully balanced interconnects while providing full compatibility with all unbalanced sources.

LOW GAIN FOR LOW SYSTEM NOISE

The AHB2 is a low-gain design. Maximum output is not reached until the balanced inputs reach +22 dBu. This is a much higher signal level than is used at the input of most power amplifiers. High interface signal levels are required to achieve the best possible system signal to noise ratio (SNR). Most power amplifiers have far too much gain and consequently they suffer from poor noise performance. The AHB2 is 10 dB to 30 dB quieter than some of the very best power amplifiers on the market. A rear-panel gain switch can be used to set the AHB2 at higher gain settings if necessary. The low-gain setting is designed to interface directly with Benchmark DAC3 converters and other professional audio products.

BULLETPROOF PROTECTION SYSTEM - NO RELAYS

The AHB2 has a unique protection system that prevents damage from overloads and short circuits. The protection system monitors output voltage, output current, output distortion, output device SOA (safe operating area), power supply current, power supply voltage, AC line voltage, case temperatures, and power device temperatures. Fault conditions silently mute both output channels in order to protect the speakers and amplifier from damage. The amplifier outputs are also muted while the amplifier is turning on or off.

The mute circuits are fully electronic. There are no mechanical relays in the mute circuits. Our tests showed that relays are too slow to protect against certain fault events. Our tests also showed that relay contacts can add significant distortion as they deteriorate with use. The AHB2 is one of very few amplifiers that avoids the use of relays in the output stage. This means that the AHB2 will maintain its rated distortion performance after an unlimited number of power on/off cycles. 

Benchmark's unique distortion monitoring system mutes the amplifier if it is excessively driven into clipping. This system protects tweeters from an overdriven amplifier.

Benchmark's short circuit detection system is fast enough to fully protect the amplifier from events occurring at any output voltage or current. This system detects abnormal loads and instantly mutes the outputs. 

A status display shows the exact cause of the fault so that the problem can be corrected.

SPEAKON OUTPUT CONNECTORS

The AHB2 is equipped with high-quality binding posts, and SpeakON output connectors. The high-current SpeakON connectors are designed for heavy-duty commercial sound systems and provide much better electrical connections than binding posts. Benchmark highly recommends the use of the twist-lock SpeakON output connectors. We also highly recommend the use of our top-quality professional-grade speaker cables.

A.H.B.

The letters A, H, and B allude to the unique topology of the amplifier's output stage. The AHB2 combines class-AB, and class-H topologies using a feed-forward error correction system.

But there is much more to the story -

The initials A.H.B. can be found on many of the circuit diagrams of Benchmark's early products dating back as far as 1983. These are the initials of Benchmark's founder, Allen H. Burdick. He personally designed many of Benchmark's early products.

Allen had a life-long passion for audio, and he became one of the leading innovators in the pro-audio industry. The AHB2 is named in his memory.v

CONTINUOUS AVERAGE OUTPUT POWER

< 0.0003 % THD+N at full rated power, 20 Hz to 20 kHz

  • 100 Watts per channel into 8 Ohms, both channels driven
  • 130 Watts per channel into 6 Ohms, both channels driven
  • 190 Watts per channel into 4 Ohms, both channels driven
  • 240 Watts per channel into 3 Ohms, both channels driven
  • 200 Watts into 16 Ohms, bridged mono
  • 380 Watts into 8 Ohms, bridged mono
  • 480 Watts into 6 Ohms, bridged mono

All speakers have variations in input impedance. Select loads based on nominal impedances not minimum impedances. The AHB2 is stable into all loads. The AHB2 is conservatively rated at an output level where THD+N is < 0.0003 % instead of the more typical 1% THD+N. Power at 1% THD will be higher.

OUTPUT VOLTAGE INTO VARIOUS LOAD IMPEDANCES

< 0.0003 % THD+Nat the following output voltages and load impedances, 20 Hz to 20 kHz

  • 29.03 dBV, 31.25 dBu, 28.28 Vrms into 8 Ohms, both channels driven
  • 28.92 dBV, 31.14 dBu, 27.93 Vrms into 6 Ohms, both channels driven
  • 28.81 dBV, 31.03 dBu, 27.57 Vrms into 4 Ohms, both channels driven
  • 28.57 dBV, 30.79 dBu, 26.83 Vrms into 3 Ohms, both channels driven
  • 27.14 dBV, 29.36 dBu, 22.76 Vrms into 2 Ohms, both channels driven
  • 35.05 dBV, 37.27 dBu, 56.57 Vrms into 16 Ohms, bridged mono
  • 34.83 dBV, 37.05 dBu, 55.14 Vrms into 8 Ohms, bridged mono
  • 34.59 dBV, 36.81 dBu, 53.67 Vrms into 6 Ohms, bridged mono
  • 33.16 dBV, 35.38 dBu, 45.52 Vrms into 4 Ohms, bridged mono

Use dBV to calculate the peak SPL from your speaker/amplifier combination. Use the following formula: Amplifier output voltage in dBV + speaker sensitivity at 2.83V - 9 dB. Example: (29.03 dBV at 8 Ohms) + (90 dB SPL @ 2.83V 1m) - 9 dB = 110 dB SPL at 1 meter

SNR & DYNAMIC RANGE

Rated output relative to output noise, inputs shorted

  • 132 dB A-weighted, Stereo Mode
  • 135 dB A-weighted, Mono Mode
  • 130 dB Unweighted, 20 Hz to 20 kHz, Stereo Mode
  • 133 dB Unweighted, 20 Hz to 20 kHz, Mono Mode

NOISE VOLTAGE

Output noise voltage, A-weighted, inputs shorted

  • -103 dBV, -101 dBu, 7.1 uVrms, Stereo Mode
  • -100 dBV, -98 dBu, 9.8 uVrms, Mono Mode

Use dBV to calculate the SPL of the noise produced by your speaker/amplifier combination. Use the following formula: Amplifier output noise voltage in dBV + speaker sensitivity at 2.83V - 9 dB. Example: Mono mode driving very high efficiency speakers: (-100 dBV) + (104 dB SPL @ 2.83V 1m) - 9 dB = -5 dB SPL at 1 meter. This means that the system noise will be 5 dB below the threshold of hearing when driving speakers with a very high 104 dB efficiency.

NOISE RELATIVE TO 2.83 VRMS

Output noise relative to 2.83 Vrms, A-weighted, inputs shorted

  • -112 dB, Stereo Mode
  • -109 dB, Mono Mode

THD+N

1 kHz, 80 kHz LPF, at full rated output into any rated load

  • < -118 dB (< 0.00013%), Stereo Mode
  • < -118 dB (< 0.00013%), Mono Mode

THD

1 kHz, 20 kHz LPF, at full rated output into any rated load

  • < -119 dB (< 0.00011%), Stereo Mode
  • < -120 dB (< 0.00010%), Mono Mode

CROSSTALK

  • Better than -115 dB at 1 kHz
  • Better than -92 dB at 20 kHz

FREQUENCY RESPONSE

  • Better than 0.1 Hz to 200 kHz, +0/-3 dB
  • -0.01 dB at 20 Hz, -0.17 dB at 20 kHz, 8-Ohm Load
  • -0.23 dB at 20 Hz, -0.32 dB at 20 kHz, 4-Ohm Load

DAMPING FACTOR

  • 350 at 20 Hz, 8-Ohms
  • 254 at 1 kHz, 8-Ohms
  • 34 at 20 kHz, 8-Ohms
  • 7 at 200 kHz, 8-Ohms 

MAXIMUM AUDIO OUTPUT CURRENT

  • 29 A peak, per channel, both channels driven

INPUT SENSITIVITY

  • Low-Gain = 22 dBu (9.8 Vrms), Gain = 9.2 dB
  • Mid-Gain = 14.2 dBu (4 Vrms), Gain = 17.0 dB
  • High-Gain = 8.2 dBu (2 Vrms), Gain = 23 dB
  • Use Mid-Gain or High-Gain settings for unbalanced inputs
  • Unbalanced inputs require RCA to XLRM adapter cables 

INPUT IMPEDANCE

  • 50 k Ohms, normal mode
  • 1 M Ohm, common mode

INPUT CMRR

  • 80 dB at 20 Hz, typical
  • 80 dB at 1 kHz, typical
  • 65 dB at 20 kHz, typical

TRIGGER I/O

  • 12 VDC 200 mA current-limited output to trigger turn-on of remote devices
  • DC input for slaving to remote devices
  • Input responds to 3.3 V logic and higher, VIL = 1.26 V, VIH = 2.7 V
  • Absolute maximum input voltage = 30 VDC
  • Absolute minimum input voltage = -0.3 VDC
  • Input Impedance = 20 k Ohms

PROTECTION CIRCUITS

  • Fully Electronic, No Relays
  • Mute Sequencing
  • Distortion Detection
  • Short Circuit Detection
  • Over Current Detection
  • Over Temperature Detection
  • SOA Detection (Output device safe operating area)

DIMENSIONS

NON-RACK-MOUNT VERSION:

  • 11.04" W x 3.88" H x 9.34 " D - Including feet and binding posts
  • 11.04" W x 3.47" H x 8.33 " D - Excluding feet and connectors
  • Faceplate height is 2RU

RACK-MOUNT VERSION:

  • 19.00" W x 3.88" H x 10.62 " D - Including binding posts, handles and removable feet
  • 19.00" W x 3.47" H x 8.33 " D - Excluding feet and connectors
  • 9.09" rack depth, including binding posts, excluding cables
  • 11" rack depth, including cables
  • Faceplate height is 2RU

WEIGHT

  • 12.5 lbs., 16 lbs. shipping - Non-rack-mount version
  • 13.5 lbs., 17 lbs. shipping - Rack-mount version

AC INPUT

  • Auto-ranging AC Input
  • 100 to 120 VAC +/- 10%, 8 Amps, 50 - 60 Hz
  • 220 to 240 VAC +/- 10%, 8 Amps, 50 - 60 Hz
  • Idle Power Consumption = 20 W
  • Standby Power Consumption < 0.5 W
BENCHMARK AHB2 POWER AMPLIFIER
฿118,900
THE QUIETEST, CLEANEST AUDIO AMPLIFIER ON THE PLANET From the first watt to the last watt, no audio power amplifier offers lower noise or lower distortion than the Benchmark AHB2.Benchmark has r..
฿118,900

NAD C 275BEE Stereo Power Amplifier

xxx แบรนด์: NAD

รหัสสินค้า: NAD C 275BEE Stereo Power Amplifier

฿62,000 ฿50,200

เพาเวอร์-แอมป์ สเตริโอ สอง-แชนเนล ที่ได้รับการถ่ายทอดวงจรการออกแบบมาจากNAD Masters Series M3 มาโดยตรง โดดเด่นด้วยระบบDistortion Canceling Circuit ตรวจสอบและลดความเพี้ยนรวมของระบบได้อย่างมีประสิทธิภาพ แผงวงจรออกแบบวางตำแหน่งชิ้นส่วนและทิศทางการเดินสัญญานเพื่อเน้นลดการรบกวนและให้การเดินสัญญาน สั้นที่สุดเท่าที่จะำทำได้ ทรงพลังด้วยกำลังขับ 150 วัตต์ ต่อข้าง และสูงสุดได้ถึง 600 วัตต์ พร้อมทั้งสามารถบริดจ์โมโนได้ถึง 800 วัตต์ เลยทีเดียว

Features

  • 150W x 2 Continuous Power into 4 ohms and 8 ohms
  • 250W, 410W, 600W IHF Dynamic power into 8, 4 and 2 ohms, respectively
  • PowerDrive™ circuit
  • Holmgren Toroidal Power transformer
  • All discrete circuitry
  • Class A Voltage Stages
  • Distortion Canceling Circuit
  • BEE Anti-saturation Clamp
  • Short signal path from input to output
  • All sockets Gold plated
  • Soft Clipping™
  • ATOLogic 12 volt trigger/ signal sensing input
  • Detachable IEC Power Cable
  • <1W Standby Power Consumption
  • Free of lead and other environmentally dangerous substances

NAD C275BEE Stereo Power Amplifier specifications:

Power Amp
Continuous average power output into 8ohms >150 W (ref. rated THD, 20 Hz – 20 kHz)
Rated distortion (THD 20Hz-20kHz) <0.008 % (ref. 20 Hz - 20 kHz)
Clipping power (max cont. power/channel) >170 W (ref. 1 kHz 1% THD)
IHF dynamic power 8 ohms 250 W
4 ohms 410 W
2 ohms 600 W
Damping factor >180 (ref. 8 Ω, 50 Hz and 1 kHz)
Input impedance R and C 100 kΩ + 100 pF
Input sensitivity (for rated output into 8 ohms) 1-2v (ref. rated power)
Voltage gain 29 dB
Signal to noise ratio, A-weighted ref. 1W >102 dB (A-weighted, ref. 1 W)
ref. rated power >123 dB (A-weighted, ref. 150 W)
Bridged (Monophonic) Mode
IHF dynamic power 8 ohms 800 W
4 ohms 1200 W
Physical Specification
Dimensions (W×H×D) Imperial 17 1/8” x 5 1/4” x 13 3/4”
Metric 435 x 133 x 352 mm
Gross Dimensions (W×H×D) Imperial 17 1/8” x 6” x 15”
Metric 435 x 150 x 378 mm
Net Weight Imperial 32.2 lbs
Metric 14.6 kg
Shipping Weight Imperial 37.3 lbs
Metric 16.9 kg

* NAD reserves the right to change specifications or design at any time without notice. All specifications are those in effect at time of printing.

หมายเหตุ:
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2. ทางบริษัทฯ ขอสงวนสิทธิ์ในการเปลี่ยนแปลงราคา รายการส่งเสริมการขาย และรายละเอียดของสินค้า โดยไม่แจ้งให้ทราบล่วงหน้า

Sale
NAD C 275BEE Stereo Power Amplifier
฿62,000
฿50,200
เพาเวอร์-แอมป์ สเตริโอ สอง-แชนเนล ที่ได้รับการถ่ายทอดวงจรการออกแบบมาจากNAD Masters Series M3 มาโดยตรง โดดเด่นด้วยระบบDistortion Canceling Circuit ตรวจสอบและลดความเพี้ยนรวมของระบบได้อย่างม..
฿62,000
฿50,200

NAD M22 V2 Stereo Power Amplifier

xxx แบรนด์: NAD

รหัสสินค้า: NAD M22 V2 Stereo Power Amplifier

฿165,000 ฿137,000

Hybrid Digital Amplification

The M22 is using the latest nCore amplifier technology licensed from Hypex to provide a nearly ideal amplifier with distortion below measurement, ultra-high damping factor, and unconditional stability with any speaker. Tight, detailed sound with amazing control and transparency gets the best performance available. With nCore, Hypex has refined their UcD concept to new levels of perfection by improving the modulator for more accurate feedback subtraction and PWM generation. The all-discrete driver and output stage have also been improved for lower open-loop THD as well as lower idling losses, normally conflicting requirements with conventional IC driver circuitry. An added control loop incorporating an integrator with adaptive clipping enables 20dB more feedback to be used across the audio band because of its extremely low-phase shift resulting in a dramatic reduction in distortion across the audio band. This is added to UcD’s already amazing characteristics of load invariance and high current capability, common characteristics of great-sounding amplifiers.

Effortless Power

Employing the latest generation of digital PowerDrive™, the M22 offers a minimum of 300W per channel with amazing reserves of dynamic power at lower impedances. The M22 is capable of >400W dynamic power per channel even in 8 ohms, >700W in 4 Ohms, and 1,000W in 2 ohms. Need more power? Select Bridge Mode and the M22 offers 950W at 8 Ohms in Mono. It can effortlessly power any loudspeaker to live performance levels with amazing efficiency and low power consumption. Control for PowerDrive is derived by sensing the average output power, applying a time constant, and then cleanly hard clipping the signal thus limiting it to the rated continuous clipping power over a sustained loading. By controlling the power envelope maximum clean power is obtained for every operating condition.

Perfecting Performance

The output stage is only one of several circuits in the amplifier, and each must complement the other to obtain optimal performance. The amp is DC coupled throughout, from input to output, there is no capacitor in the forward signal path. Yet, it has a beneficial 12dB/octave roll-off below 2Hz. It does this using a unique circuit topology that is functionally a forward servo. It is however not a servo in the traditional sense as it does not measure DC at the output and send back a correction signal. Instead part of the input signal is fed to a side chain with a second order low-pass filter. The output of this is subtracted from the forward signal input to the second stage thus rejecting DC.

Clean and Dynamic

The performance of the entire signal path is critically dependent on the power supply; in this case a well regulated, but not too tight, custom switch mode design. This allows maximum dynamic power, very high current yet with very low distortion. Secondary supplies are individually regulated and decoupled at each opamp for lowest possible noise and maximum dynamic range.

AUDIO SPECIFICATIONS

Continuous output power into 8 ohms and 4 ohms (Stereo mode)

  • 300 W (20 Hz-20 kHz at 0.1% THD, both channels driven)

Continuous output power into 8 ohms (Bridge mode) THD+N (20 Hz – 20 kHz, CCIF IMD, SMPTE IMD, DIM 100)

  • 900 W (20 Hz – 20 kHz at 0.1% THD)
  • <0.005 % (250 mW to 290W, 8 ohms and 4 ohms)
  • Note: Measured with Audio Precision AUX-0025 or Prism dS-LPF passive low pass filter

Signal-to-Noise Ratio

  • >100 dB (A-weighted, ref. 1 W in 8 ohms
  • >120 dB (A-weighted, ref. 300W in 8 ohms)

Clipping power (Stereo mode, at 1 kHz 8 ohms 0.1 % THD)

  • >300 W

Clipping power (Bridge mode, at 1 kHz 8 ohms 0.1 % THD)

  • >950 W

IHF dynamic power (Stereo mode, at 1 kHz 1 % THD)

  • 8 ohms: 400 W
  • 4 ohms: 700 W
  • 2 ohms: 1000 W

Damping factor

  • >800 (ref. 8 ohms)

Frequency response

  • ±0.1 dB (20 Hz – 20 kHz)

Input sensitivity (for 300W in 8 ohms)

  • 1.73 V

Gain level

  • Low: 19 dB
  • Medium: 24 dB
  • High: 29 dB

Minimum input level for Auto Trigger

  • 5 mV at 1 kHz

Standby power

  • <0.5 W

DIMENSION AND WEIGHT

Gross dimensions (W x H x D)

  • 435 x 103 x 379 mm
  • 17 1/8 x 4 1/16 x 14 15/16 inches

Net Weight

  • 8.9 kg (19.6 lbs)

Shipping Weight

  • 15 kg (33.1 lbs)
Sale
NAD M22 V2 Stereo Power Amplifier
฿165,000
฿137,000
Hybrid Digital Amplification The M22 is using the latest nCore™ amplifier technology licensed from Hypex to provide a nearly ideal amplifier with distortion below measurement, ultra-high ..
฿165,000
฿137,000

NAD M27 Seven Channel Power Amplifier

xxx แบรนด์: NAD

รหัสสินค้า: NAD M27 Seven Channel Power Amplifier

฿235,000 ฿195,100
The M27 can effortlessly create a truly realistic surround sound experience that will transport you directly into a new hyper-reality.
 

> Hybrid Digital Amplification

The M27 uses the latest nCore™ amplifier technology licensed from Hypex. With nCore, Hypex has refined their UcD concept to new levels of perfection by improving the modulator for more accurate feedback subtraction and PWM generation. The all-discrete driver and output stage have also been improved for lower open-loop THD as well as lower idling losses, normally conflicting requirements with conventional IC driver circuitry. An added control loop incorporating an integrator with adaptive clipping enables 20dB more feedback to be used across the audio band because of its extremely low phase shift resulting in a dramatic reduction in distortion across the audio band. This is added to UcD's already amazing characteristics of load invariance and high current capability, common characteristics of great sounding amplifiers. Nothing can match the performance of hybrid digital amplifier technology. The sonic character of the M27 only reinforces the story told by the numbers. This is an amazingly powerful and transparent amplifier design that does everything well.

> Fully Balanced Audio

The same efficient audio interface used by studios provides the highest level of signal integrity with the lowest noise floor. Locking connectors and special interface electronics allow long cable runs without noise pickup or signal loss. All you get is awesome sound without the possibility of noise pickup or interference.

> Effortless Power

As our most powerful amplifier ever, the M27 can pump out over 600W into difficult loads to follow complex dynamic peaks in your movies and music. Everything from rim shots to asteroid explosions sound remarkably real and immersive. The M27 has power reserves to meet the demands of the latest high-resolution digital soundtracks. Thanks to the advanced nCore amplifier technology, all this monster power comes at a lot less cost than traditional technology and delivers more power and performance!

> Legendary PowerDrive™

NAD PowerDrive™ circuit delivers very high dynamic power and low impedance drive to accurately control loudspeakers, resulting in remarkably musical and relaxed sound. PowerDrive gives the M27 maximum power no matter what you throw at it—and without the energy drain. NAD's exclusive SoftClipping™ feature is also included to protect your speakers (and ears) from damaging clipping distortion. Control for PowerDrive is derived by sensing the average output power, applying a time constant, and then cleanly hard clipping the signal thus limiting it to the rated continuous clipping power over a sustained loading. By controlling the power envelope maximum clean power is obtained for every operating condition. 

หมายเหตุ:
1. ทางบริษัทฯ ขอสงวนสิทธิ์ในการรับผิดชอบใดๆอันเนื่องจากข้อผิดพลาดทางการพิมพ์ (ผิด/ตก)

2. ทางบริษัทฯ ขอสงวนสิทธิ์ในการเปลี่ยนแปลงราคา รายการส่งเสริมการขาย และรายละเอียดของสินค้า โดยไม่แจ้งให้ทราบล่วงหน้า

 

Sale
NAD M27 Seven Channel Power Amplifier
฿235,000
฿195,100
The M27 can effortlessly create a truly realistic surround sound experience that will transport you directly into a new hyper-reality.   > Hybrid Digital Amplification The M2..
฿235,000
฿195,100

Available Options

Wyred 4 Sound mAMP Mono-block Amplifier

xxx แบรนด์: Wyred 4 Sound

รหัสสินค้า: Wyred 4 Sound mAMP Mono-block Amplifier

฿41,200

Utilizing the latest generation of ICEpower® technology with a completely redesigned input stage, the mAMP is a highly efficient amplifier that delivers superior audio quality. Using dual 14AWG OFC wiring direct soldered to gold plated 5-way binding posts, the mAMP yields exceptional micro-dynamics and transparent power to your speakers.

The mAMP’s input stage has been meticulously refined to optimize frequency response producing smooth upper-mid frequencies while keeping bass extension low and tight. Regardless of input type, the high quality dual differential common mode converter (derived from our DAC-2) feeds the amplifier with a pure balanced signal that isolates problematic impedance mismatches. Third generation technology significantly reduces the detrimental effects of a noisy source through balanced circuitry, audio grade capacitors, and a quad-paralleled FET buffer. While in standby, power consumption is less than 0.5w with idle power loss under 10 watts.

The mAMP’s monoblock form factor allows you to use a short speaker cable for each channel by placing the amp in near proximity to each speaker, reducing the cost of speaker cable while improving the performance of your system.

An attractive anodized finish surrounds a rigid industrial design that is immune to the frequencies and vibrations generated by the various components in your HiFi system.

"These ‘Little Guys’ get my highest recommendation." - Audiophilia

 

                                                     


Kimber Wire/WBT binding post upgrade:

Under the Select Options dropdown, you can choose to upgrade the internal wiring and binding posts of your mAMPs! We replace our usual OFC internal wiring with premium Kimber TCX wire, a 14 ga. multi-gauge/multi-strand OFC wire for improved transparency and sound. We also replace our normal binding posts with high-end, German-made WBT nextgen® binding posts for a better fit and connection. Consider this upgrade to maximize the performance of your mAMPs.






mAMP Features
  • Utilizes latest generation (ASX2) ICEpower® audio technology
  • 250w in 8Ω
  • 430w in 4Ω
  • External selectable mains voltage 115/230VAC
  • Idle power consumption 9.5w
  • Thermal protection
  • Differential, fully balanced
  • Over current protection
  • Sound optimized soft clip
  • Robust construction
  • Standard 12V DC Trigger
  • Machined and anodized aluminum front panel
  • Gold Plated unbalanced (RCA) input
  • Neutrix Balanced (XLR) input
  • 3rd Generation fully balanced input stage with impedance of 100k
  • Compact size (8"W x 3.5" x 8"D)
  • 8 lbs.
  • Covered by a 5 YEAR WARRANTY
mAMP Specs
  • Typical THD+N 8Ω (10W out): 0.002%
  • Power Output 8Ω @ 0.2% THD+N: 250W
  • Power Output 8Ω @ 1.0% THD+N: 277W
  • Power Output 4Ω @ 0.2% THD+N: 430W
  • Power Output 4Ω @ 1.0% THD+N: 460W
  • Output Idle Noise: <125µV
  • Frequency Response 20Hz-20kHz: ± 0.1db
  • Lower Bandwidth: 1.5Hz (All Loads)
  • Balanced Input Impedance: 100kΩ
  • Unbalanced Input Impedance: 100kΩ
  • Dynamic Range: 111db
  • Gain: 30db
  • Sensitivity: 1.31V
  • Output Impedance: 0.018Ω
  • Min Load: 3Ω
  • Max Output Current: 30A
  • Idle Power Consumption: 9.5W
  • Standby Power Consumption: <0.5W
Wyred 4 Sound mAMP Mono-block Amplifier
฿41,200
Utilizing the latest generation of ICEpower® technology with a completely redesigned input stage, the mAMP is a highly efficient amplifier that delivers superior audio quality. Usi..
฿41,200

Available Options

Wyred 4 Sound MC 7150 Multi-Channel Amplifier

xxx แบรนด์: Wyred 4 Sound

รหัสสินค้า: Wyred 4 Sound MC 7150 Multi-Channel Amplifier

฿53,000

Built for the enthusiast who’s ready to improve on the low fidelity power of his home theater receiver, the MC7150 has just the right balance of power and efficiency at the right price. Armed with seven channels of Class D amplifier technology, the MC 7150 produces 150 watts of precise, transparent, and efficient power; simply plug the pre-outs of your existing receiver or processor into the MC 7150. Surrounding the MC 7150’s high quality thermal, short circuit and over current protection is a beautifully fabricated chassis, guaranteeing the MC 7150 will run as proficiently on the inside as it looks great on the outside.

MC 7150 Multi-Channel Amplifier Features
  • 150w in 8Ω
  • External selectable mains voltage 115/230VAC
  • Differential design
  • Thermal protection
  • Short circuit protection
  • Over current protection
  • Standard 12VDC trigger
  • Machined and powder coated front panel
  • Gold Plated unbalanced (RCA) input
  • Covered by a 5 YEAR WARRANTY
MC 7150 Multi-Channel Amplifier Specs
  • Typical THD+N 8Ω (10W out): 0.003%
  • Power Output 8Ω @ 0.2% THD+N (2 channels driven): 165W
  • Power Output 8Ω @ 1.0% THD+N (2 channels driven): 180W
  • Power Output 8Ω @ 0.2% THD+N (1 channels driven): 335W
  • Power Output 8Ω @ 1.0% THD+N (1 channels driven): 364W
  • Power Output 8Ω @ 1.0% THD+N (7 channels driven) benchtest: 120W
  • Output Idle Noise: <150µV
  • Frequency Response 20Hz-20kHz: ± 0.027db
  • Unbalanced Input Impedance: 61.9kΩ
  • Dynamic Range: 106db
  • Gain: 30db
  • Sensitivity: 1.15V
  • Min Load: 4Ω
  • Idle Power Consumption: <10W
  • Standby Power Consumption: <0.5W
  • Dimensions: L 13.75" W 15.75" H 4.625" 
Wyred 4 Sound MC 7150 Multi-Channel Amplifier
฿53,000
Built for the enthusiast who’s ready to improve on the low fidelity power of his home theater receiver, the MC7150 has just the right balance of power and efficiency at the right price...
฿53,000

Available Options

Wyred 4 Sound MC Multi-Channel Amplifier

xxx แบรนด์: Wyred 4 Sound

รหัสสินค้า: Wyred 4 Sound MC Multi-Channel Amplifier

฿158,400

Using the same ICEpower® technology as our monoblocks, our multi-channel series amplifiers offer seven different configurations to fit any application. For those who need big power throughout their system, there’s 500 watts per channel available in configurations in five or seven channels. 

All multi-channel amps offer a unique high-pass filter on the front two channels, effectively separating frequencies below 80Hz from the signal path where a subwoofer can be more affective. In a home theater application this allows your main 2 channel speakers to focus on mid-high frequency reproduction. All MC are available in black or silver, have an independent FET input buffer for each channel, and 12V DC trigger input and outputs. Gold plated binding posts and RCA/XLR inputs are standard features on these remarkable amplifiers. 

Note: Due to increased power requirements, the 7 channel configurations have dual power IEC inlets.


Kimber Wire/WBT binding post upgrade:
WBT nextgen® binding post
Under the Select Options dropdown, you can choose to upgrade the internal wiring and binding posts of your MC! We replace our usual OFC internal wiring with premium Kimber TCX wire, a 14 ga. multi-gauge/multi-strand OFC wire for improved transparency and sound. We also replace our normal binding posts with high-end, German-made WBT nextgen® binding posts for a better fit and connection. Consider this upgrade to maximize the performance of your MC.
 
MC Multi-Channel Features
  • Powered by ICEpower® (ASP)
  • Factory Selectable Mains 115/230VAC
  • Idle Power Consumption 60W​
  • Differential, fully-balanced
  • Thermal Protection
  • Over Current Protection
  • DC Protection
  • Sound Optimized Soft Clip
  • Rugged Construction
  • Standard 12VDC Trigger Input and Output
  • 1/2" Machined and Anodized Front Panels
  • Gold Plated Insulated 5 Way Binding Posts
  • Gold Plated Unbalanced (RCA) Input
  • Neutrik Balanced (XLR) Input
  • Exceptional input stage raises input impedance to 60.4k Ω
  • 17.25"W x 8"H x 16"D
  • Covered by a 5 year warranty
MC Multi-Channel Specs

250W Channel / 500W Channel

  • Typical THD+N 8Ω (10W out): 0.0027% / 0.0055%
  • Power Output 8Ω @ 0.2% THD+N: 250W / 570W
  • Power Output 8Ω @ 1.0% THD+N: 330W / 625W
  • Power Output 4Ω @ 0.2% THD+N: 550W / 1,140W
  • Power Output 4Ω @ 1.0% THD+N: 625W / 1,225W
  • IMD (CCIF): 0.0005% / 0.0005%
  • Transient Intermodulation (TIM): 0.003% / 0.005%
  • Output Idle Noise: 80µV / 80µV
  • Efficiency 4Ω: 81% @ 500W / 79% @ 1000W
  • Efficiency 8Ω: 78% @ 200W / 78% @ 500W
  • Frequency Response 20Hz-20kHz: ± 0.3db / ± 0.4db
Wyred 4 Sound MC Multi-Channel Amplifier
฿158,400
Using the same ICEpower® technology as our monoblocks, our multi-channel series amplifiers offer seven different configurations to fit any application. For those who need big power throughout the..
฿158,400

Wyred 4 Sound MMC Series Multi-Channel Amplifier

xxx แบรนด์: Wyred 4 Sound

รหัสสินค้า: Wyred 4 Sound MMC Series Multi-Channel Amplifier

฿80,200

Featuring monoblock power built into a super-compact footprint, the MMC is an amplifier that’s available in five- or seven-channel configurations. Delivering 221 watts of power per channel at 8 ohms 0.2% THD+N (and 368 watts at 4 ohms), the MMC provides 121db of dynamic range per channel using the same ICEpower® circuitry found in our mAMP. The input stage ensures superb synergy with any source component and the absolute best audio quality for your Hi-Fi system.

Additional channels can be added at a later date if you need to upgrade from the five-channel version. Simply contact our service department for further information regarding the procedure and associated pricing.

MMC Features
  • Multi-mono design
  • Differential, Fully balanced input to output
  • Independent inputs (XLR/RCA)
  • 220W in 8 ohms per channel
  • 360W in 4 ohms per channel
  • Super compact size (17”W x 4”H x 13”D)
  • Covered by a 5 YEAR WARRANTY
MMC Specifications
  • Typical THD+N 8Ω (10W out): 0.0045%
  • Power Output 8Ω @ 0.2% THD+N: 221W
  • Power Output 8Ω @ 1.0% THD+N: 258W
  • Power Output 4Ω @ 0.2% THD+N: 368W
  • Power Output 4Ω @ 1.0% THD+N: 437W
  • IMD (CCIF): 0.0003%
  • Transient Inter modulation (TIM): 0.006%
  • Output Idle Noise: <80µV
  • Efficiency 4Ω: 80.4% @ 400W
  • Efficiency 8Ω: 86.4% @ 250W
  • Frequency Response 20Hz-20kHz: ± 0.3db
  • Lower Bandwidth: 1.5Hz (All Loads)
  • Balanced Input Impedance: 60.4kΩ
  • Unbalanced Input Impedance: 60.4kΩ
  • Dynamic Range: 121db
  • Gain: 30.8db
  • Sensitivity: 1.211V
  • Output Impedance: 18mΩ
  • Min Load: 3Ω
  • Dampening Factor (100Hz 8Ω): 500
  • Max Output Current: 30A
Wyred 4 Sound MMC Series Multi-Channel Amplifier
฿80,200
Featuring monoblock power built into a super-compact footprint, the MMC is an amplifier that’s available in five- or seven-channel configurations. Delivering 221 watts of power per channel at 8 o..
฿80,200

Available Options

Wyred 4 Sound ST mkII Series Stereo Amplifiers

xxx แบรนด์: Wyred 4 Sound

รหัสสินค้า: Wyred 4 Sound ST mkII Series Stereo Amplifiers

฿55,000
***Now offering ST-750LE***

"Give this pre-power combo an hour to warm up and you’ll soon see that it’s a crisp, detailed and neutral sounding package with plenty of wallop." 

          - David Price, HI-Fi Choice on the ST-750LE

 
"These high-efficiency power amplifiers—delivering 250 and 500 Wpc respectively—have got to be among the great bargains in audio…. delivering sound of exemplary clarity and control"

— The Absolute Sound. 2017 Editors' Choice Award: Power Amplifiers $1000 - $3000 category


Our ultra-high end ST-500 / ST-750LE / ST-1000 mkII amplifiers deliver all the refinements of our award-winning mAMP monoblocks with the convenience of one component. As with the mAMP, both the ST-500 mkII and ST-1000 mkII are built on the new generation of ICEpower® technology and boast a 3rd generation input stage that produces smooth upper-mids and low and tight bass. With 14AWG OFC wiring direct soldered to gold plated 5-way binding posts, optimum power delivery and reference audio quality is guaranteed.

Whether using balanced or unbalanced inputs, the dual differential common mode converter ensures a perfectly balanced signal is fed to the power amp, while the quad FET buffer optimizes synergy between components. Ruggedly built yet exhibiting a smoothly toned industrial design, our STmkII series showcases unmatched value and performance.

For the ST-750, we decided to use the new 700AS2 module from ICEpower.  Originally thinking this followed the same design platform as the 1200AS module, we thought it would be good to inject some newer circuitry to our lineup. Although it is not made with the new ICEedge topology,  this module is the newest non-ICEedge circuit and was the logical stepping stone for ICEpower to use before completing the ICEedge standard found in the 1200AS1/2 module.

The 700AS2 module is a stereo full bridge design. We usually have a concern when not using a dual mono design (found in other stereo amps in our line) but the isolation and pure robustness of this amp should not be understated. It offers the most generous continuous output power without thermal shutdown (200wpc) and a powersupply to far exceed that. Channel separation meets or exceeds our other multi-mono designs as well. All around it is the most pleasing module we’ve used and are very happy to have it in our line.


 


Kimber Wire/WBT binding post upgrade:

Under the Select Options dropdown, you can choose to upgrade the internal wiring and binding posts of your ST mkII! We replace our usual OFC internal wiring with premium Kimber TCX wire, a 14 ga. multi-gauge/multi-strand OFC wire for improved transparency and sound. We also replace our normal binding posts with high-end, German-made WBT nextgen® binding posts for a better fit and connection. Consider this upgrade to maximize the performance of your ST mkII.

 





STmkII Series Features
  • Utilizes latest generation (ASX2) or (AS) ICEpower® audio technology
  • Up to 460wpc in 8Ω
  • External selectable mains voltage 115/230VAC
  • Idle power consumption 28w
  • Dual-mono design - ST-500mkII, ST-1000mkII
  • Differential, fully-balanced
  • Thermal protection
  • Over current protection
  • Sound optimized soft clip
  • Robust construction
  • Standard 12V DC Trigger
  • Machined and anodized aluminum front panel
  • Gold Plated unbalanced (RCA) input
  • Neutrix Balanced (XLR) input
  • 3rd Generation fully balanced input stage with impedance of 92k
  • Covered by a 5 YEAR WARRANTY
ST-500 mkII Stereo Amplifier Specs
  • Typical THD+N 8Ω (10W out): 0.001%
  • Power Output 8Ω @ 0.2% THD+N: 250W
  • Power Output 8Ω @ 1.0% THD+N: 277W
  • Power Output 4Ω @ 0.2% THD+N: 430W
  • Power Output 4Ω @ 1.0% THD+N: 460W
  • Output Idle Noise (A Wt.): <125µV
  • Frequency Response 20Hz-20kHz (8Ω @ 10W): ± 0.1db
  • Lower Bandwidth: 1.5Hz all loads
  • Balanced Input Impedance: 100kΩ
  • Unbalanced Input Impedance: 100kΩ
  • Dynamic Range (A Wt.): 111db
  • Gain: 30.5db
  • Sensitivity: 1.31V
  • Output Impedance: 0.018Ω
  • Min Load: 3Ω
  • Max Output Current: 30A
  • Idle Power Consumption: <28W
  • Standby Power Consumption: <0.5W
  • Dimensions: L 13.75" W 15.75" H 4.625" 
ST-750LE Stereo Amplifier Specs
  • Typical THD+N 8Ω (10W out): 0.002%
  • Power Output 8Ω @ 0.2% THD+N: 325W
  • Power Output 8Ω @ 1.0% THD+N: 375W
  • Power Output 4Ω @ 0.2% THD+N: 675W
  • Power Output 4Ω @ 1.0% THD+N: 725W
  • Output Idle Noise (A Wt.): <190µV
  • Frequency Response 20Hz-20kHz (8Ω @ 10W): ± 0.25db
  • Lower Bandwidth: 1.5Hz all loads
  • Balanced Input Impedance: 92kΩ
  • Unbalanced Input Impedance: 92kΩ
  • Dynamic Range (A Wt.): 110db
  • Gain: 27db
  • Sensitivity: 2.1V
  • Output Impedance: 0.007Ω
  • Min Load: 2.5Ω
  • Max Output Current: 30A
  • Idle Power Consumption: <28W
  • Standby Power Consumption: <0.5W
  • Dimensions: L 13.75" W 15.75" H 4.625"
ST-1000 mkII Stereo Amplifier Specs
  • Typical THD+N 8Ω (10W out): 0.001%
  • Power Output 8Ω @ 0.2% THD+N: 460W
  • Power Output 8Ω @ 1.0% THD+N: 480W
  • Power Output 4Ω @ 0.2% THD+N: 725W
  • Power Output 4Ω @ 1.0% THD+N: 775W
  • Output Idle Noise (A Wt.): <215µV
  • Frequency Response 20Hz-20kHz (8Ω @ 10W): ± 0.15db
  • Lower Bandwidth: 1.5Hz all loads
  • Balanced Input Impedance: 92kΩ
  • Unbalanced Input Impedance: 92kΩ
  • Dynamic Range (A Wt.): 108db
  • Gain: 30.7db
  • Sensitivity: 1.75V
  • Output Impedance: 0.021Ω
  • Min Load: 4Ω
  • Max Output Current: 30A
  • Idle Power Consumption: <28W
  • Standby Power Consumption: <0.5W
  • Dimensions: L 13.75" W 15.75" H 4.625"
Wyred 4 Sound ST mkII Series Stereo Amplifiers
฿55,000
***Now offering ST-750LE***"Give this pre-power combo an hour to warm up and you’ll soon see that it’s a crisp, detailed and neutral sounding package with plenty of wallop."     &n..
฿55,000
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