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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)
DAC / Headphone amp / preamp all in one
Fully balanced design built by discrete analog stages without any
OPA or coupling caps in the signal channels.
Non- feedback ACSS analog output stage .
Uses three R-core transformers (135W total), separate power supplies
for the digital components, right and left channels.
More than 50,000uf audio grade NOVER capacitors are used to ensure
ample and smooth power supply.
A total of 9 groups class A PSU's are used to purify the power
supply. To achieve a high S/N ratio, the control circuit is powered with
Uses high-grade parts and exactly matched transistors.
Four channel 99 steps digitally controlled relay-based volume
control avoids channel imbalance and improves sound quality.
5 digital inputs:
AES / BNC+RCA coaxial / RCA coaxial / Optical / USB
3 analog preamp inputs:
XLR / RCA / RCA
Preamp / DAC output :
XLR / RCA / ACSS (variable)
Headphone output :
4 pins XLR / 6.3MM SE
Memorizes all settings and resumes the last setting when
powered on (see user manual).
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 WBT tin solder)