PASS A3 Single-Ended Class A Power Amplifier Kit. Free debugging. if Welding is correct. connect power will can works.
Reference to Famous PASS A3 circuit . All the FET are equipped same with the origianl machine, the input differentialTransistors using the new US FU9210, the power Transistors using the new origianl N-channel IRFP250, FET after precision matching,
Sound style: Sweet and mellow, music taste very good, transparent.sound will be better than most of General amplifier.
PCB Size: 122MMX74MM
Operating voltage: Recommended DC: + - 25V
( the Transformer voltage recommned AC20V-0-AC20V. transformer power above 200VA)
Power: 30watts @ 8ohms; 60watts @ 4 ohms
Distortion rate @ 1 KHz: 1% at rated output;
0.003% @ 5 watts into 8 ohms
Input impedance: 36kohm balanced, 18kohm single-ended
Output noise: <300uV unweighted 20-20kHz
Dynamic range: 140dB
Gain: 26 dB
Signal input support: balanced input or unbalanced input
1 pc Assembled PASS A3 Single-ended Class A power amplifier board 30W+30W DIY AMP