Biasing a Sunn Coliseum Bass amp

[J M Fahey]

Please

1) without load , measure voltage from each speaker terminal to ground (yes, you might have an open ground).

2) if ground fine, go backwards towards the Power Amp PCB output rail, power transistors legs, same with drivers, try to find signal again.

Thanks.

[spy]

ok ok, just posted in a hurry! I'll do it and I'll let you know! Thanks.

[spy]

JM, you were right for one more time! It was an open ground, problem solved, thanks.