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USB-32 Introduce and drivers
Audio-gd products had
design and test based on the AP SYS-2722 (The top-drawer
professional equipment in world)
Fully balanced design built by discrete analog stages without any
OPA and coupling caps in the signal channels, built in real balanced
DAC, output for headphone (4-pin XLR or 1/4") and DAC (fixed output) with preamp
Non- feedback ACSS analog output stage .
LED display avoids RF disturbance for better
R-core transformers and Hi-fi grade parts like DALE resistors, WIMA
Total of 6-group PSUs are used to purify the power supply , the
analog amp has discrete PSU power supply
Four-channel digitally controlled relay-based volume control to
avoid channel imbalance and improve sound quality.
steps volume level control in both high gain mode and low gain mode.
160-step volume control ensures smooth control of the
4 digital inputs:
Coaxial RCA / Coaxial BNC / Optical / USB
2 analog inputs: XLR / RCA
XLR / RCA / ACSS (User can set either variable
output level as preamp or
fixed output level as dedicated DAC )
Headphone output :
4 pin XLR / 1/4" (6.3MM) SE
Modification guide on
headphone jack for 4-pin balanced headphone output.
Click here to read:
Parts for the modification is USD30. (Includes one female 4-pin plug
and one male 4-pin plug, some tape and tin solder.)