Just finish amp9-basic,
All channels are OK with music.
However, only one of them with under 10mV DC offset,
others are 45mV, 86mV and 141mV !!!
I took the input diodes out off the PCB.
Still got the same DC offsets.
I close the jumper to operate in class T mode,
Still got the same DC offsets...
Don't know why,