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Audio-GD Master-3A - Balanced ACSS Non Negative Feedback Power Amp + 50W Pure Class A

- Each channel has 90W @ 8 ohms ,360W @ 2 ohms max power
- Real Balanced ACSS Non Negative Feedback Power Amp
- Supports XLR and ACSS inputs
- Applied "Linear Fidelity" Technology
- Soft Start Power Design
- 24 pcs output transistors

Please note:
The Master 3A is a 50W pure class A power amp, when it working , it can achieve 50 degree centigrade , please place them at the air flow area .
The Master 3A has 90W at 8 ohms, 360W at 2 ohms each channel output . For the home audio system, if the speaker with lower than 86DB sensitivity , the listen room usually around 20 square meters , if the listen room is larger , the speaker usually has higher than 88DB sensitivity , for these situations, 1W / each channel avg. power already can make the speaker for normal listen , even with the quite loud listen , 5W / each channel avg. power already can boost close 100DB on the 88DB sensitivity speaker . In the case the Master 3A still has 18x times spare power , and the pure class A design make it drive ability stronger than some same power even higher power amps, that is enough for the dynamic music playback .

Summary
Fully balanced design, the gain stages and pre-driver stages work in class A, built with discrete analog stages without any OPA or coupling caps in the signal channels.
The output transistor stages have supper excellent linear, it sound like the pure class A design but without the high heat of the pure class A design .
2 analog inputs: XLR / ACSS
Applies 24 pieces of ON Semiconductor transistors. Supports 50W X2 (8 Ohms) pure class A output, 90W X2 (8 ohms) and 360W X2 (2 ohms) max power.
The capacitance of the whole machine reaches as high as 140,000 uF, with two circle core and two R cores transformers (Total 1600W) and separate power supplies for the right channel and left channels.
A total of 4 groups of high-quality class A parallel connection PSU's supply the gain stages.
Applies all audiophile grade components, including DALE resistors, WIMA caps, custom order NOVER (UK brand) caps, all audiophile grade input & output sockets and gold IEC socket.

SPECIFICATIONS (Improvement may result in changes in specifications and design without notice)
S/N Ratio: >110DB

Gain: +26 DB
Output: 90W @ 8ohm, 180W @ 4ohm, 360W @ 2ohm
Input sensitivity: 1.4V RMS @ XLR, 2mA RMS @ ACSS
Input impedance: 94K ohm @ XLR, <10 ohm @ ACSS
THD+Noise: THD+N at 8 ohm 10W, THD+N at 8 ohm 25W

Channels cross: >-120DB
Power Consumption: 300W static @240V or 120V
Transformer Power: 1600W (4 transformers)
Package Weight: Approximately 40KG
Dimensions: 48CM(W) x 44CM(D) x 19CM (H) (MM, Fully aluminium)