Audio-gd products had design and test based on the AP SYS-2722 (The top-drawer professional equipment in world)


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 .
Applies 24 pieces of ON Semiconductor transistors . 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.
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 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 interference.
Static storage mode control software for avoid disturb sound quality , the MCU output once control data and save in the perform parts ,then stop output data until users next operation.