SMSL A2 is based on STMicroelectronics (ST) The TDA7492 as the core, the use of the EPCOS · Panasonic · nichicon · ST · TI · BI · TDK and other senior fever accessories refined, high-quality digital amplifier. Advanced aluminum enclosure, drawing oxidation process, laser engraving silk screen and other technology. 
SMSL A2 is 40w X 2 stereo digital power amplifier to meet the needs of most users listening. Bass signal output A2 can see a large external active subwoofer more shocking. Along with 2-way switch signal input with memory function, avoid frequent plugging multiple sets of audio signal line trouble. Further A2 electronic volume control and dynamic balance to enhance the quality. 
Features: 
Support 2 inputs, RCA input jack and 3.5MM headphone jack input. 
Flexible and easy to connect with all the latest audio equipment, computer / cell phone / player and so on; input with memory function, human-computer science to design a multi-functional machine use. 

MCU control, easy to understand .MCU work status of the machine according to real-time monitoring and protection 

360 degree rotating electronic volume control 
The bass signal output, you can connect with active speakers 

Support EQ bass and treble adjustment. 

Specifications: 
Output Power Output Power: 40W + 40W (4 OHM) 
THD + N distortion: <0.05% 
SNR SNR:> 90dB 
Crosstalk Crosstalk: <-90dB (1KHz) 
Frequency Response Frequency Range: 20Hz - 20kHz (± 3dB) 
Power Charging Power Supply: DC19V 
Speaker Impedance speaker impedance matches: 3 OHM - 16 OHM 
Weight: 1 kg 
Dimension: 14.8 x 9.7 x 3.2 cm 

Package: 
1 x A2 Unit 
1 x User Manual 
1 x Power Adapter 

Parameters: 
Technical Specifications: 
Speaker output power : 160 W / 4Ω 
Headphone Output power : 130m W / 32Ω 
Input level : 400mv ~ 2V 
Chassis Color: Black 
Case material: Aluminum 
Chassis technology: pull pattern, coloring , CNC machining (will not fade like paint) 
Screen technology: laser engraving (not fade like paint) 
Input Interface : RCA jack (gold-plated) stereo input 
Power supply :100-240ACV 
Circuit Plate : 1.6mm full fiberglass , 2OZ (oz) copper thickness , the most advanced immersion gold processing 
Machine size : 168 × 98 × 36mm (excluding protruding parts) 
Weight : 1.5KG with packing (actual shipment weight plus packaging weight by date) 
Machine configuration : SA-160 host 1 , power adapter 1 set , manual , 1 warranty card 1 . 
Warranty period : One year 

Packaging: 
SA-160 unit x 1 
Power adapter x 1 
User manual x 1

SA-98E is based on ST Microelectronics TDA7498E core, use of EPCOS,PHILIPS,ALPS,EVOX,DALE,ERO refined accessories such as high fever, high quality digital amplifier, all its accessories to stick with original product. The Efficiency is as high as 85%, so it won't produce too much heat under the high power work, very suitable for use in the workplace for a long time (supermarket, etc.) in public .With avant-garde design and rich color choices, more easy to match your environment that occupy the home.

Technical Specifications: Output power: (DC 32V) 160 W/4Ω；THD = 10% ；Input Level: 400mv to 2VChip efficiency: 85%Chassis Color: Black Panel color: Black Case material: Aluminum Chassis technology: drawing, coloring oxide, CNC machining Screen printing process: laser engraving Input Interface: RCA sockets (gold plated) stereo input Power Supply :100-240ACVCircuit plate: 1.6mm, Immersion Gold of 2OZ (oz.) copper, the most advanced processing Machine Size: 168 x 98 x 36mm (including protruding parts)Machine weight: 1.25KG with

packaging Machine configuration:1 x SA-98E1 x Power Adapter1 x Manual