Audio-GD Master10

Fully balanced design, the gain stages and pre-driver stages working on class A , built by discrete analog stages without any OPA or coupling caps in the signal channels.

The output transistors stages work in high idle current state. The Diamond Cross output stage design avoids "switch distortion" as well as class A amps.
Non- feedback ACSS analog amps .
Four channel 99 steps digitally controlled relay-based volume control avoids channel imbalance and improves sound quality.
5 analog inputs:  RCA X2, XLR X2, ACSS X1
Applies 24 pieces of ON Semiconductor  ¡§the King of transistors¡¨ MJL4281/4302. Supports 250W X2 (8 Ohms) output.
The capacitance of the whole machine reaches as high as 140,000 uF, Two 750W (Total 1500W) core transformers. Separate power supplies for right and left channels.
A total of 4 groups of high-quality class A parallel connection PSU's power the gain stages. To achieve a high S/N, the control circuit is powered with separate regulators.
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. Applies the round-corner style chassis which has lower syntony, or vibration. Between the transformers and signal amps resides a thick metal panel to avoid interferance.
Memorizes all settings and resumes the last setting when powered on.

SPECIFICATIONS Audio-GD Master-10 (2014 version):

• S/N Ratio: >115DB
• Output :250W @ 8ohm; 500W @ 4ohm
• Output Level (Max): 58V
• Input sensitivety: 0.775 V RMS @ RCA; 1.55V RMS @ XLR; 2mA RMS @ ACSS
• Input impedance: 47K ohm @ RCA; 94K ohm @ XLR; <10 ohm @ ACSS
• Frequency Breadth: 20Hz - 20KHz ( + / -  0.01DB )
• Channels cross: -120DB
• Channels imbalance: < 0.05DB
• Power Requirement: 1 Version 100-120V AC 50/60 Hz; 2 Version 220-240V AC 50/60 Hz
• Power Consumption: 130W static @240V or 120V
• Transformer Power: 1500W (2 transformers)
• Package Weight Approximately: 38KG
• Dimensions: 48CM(W)*44CM(D)*19CM (H) (MM, Fully aluminium )
• Accessories: Power cord X1
• Operating Temperatures: +5 °C to +40 °C
• Operating Humidity: 5 % to 90 % (without dew)