Nsgarch, I don't think the directionality of the IC's would make a difference in Ian's problem, but my understanding is the arrows should go in the direction of the music -- thus, pre-amp to amp.
I agree that floating the ground on the amps, but not the pre-amp, can solve a ground loop problem. That's what I do, but I've been told it's not the safest solution, either.
I agree that floating the ground on the amps, but not the pre-amp, can solve a ground loop problem. That's what I do, but I've been told it's not the safest solution, either.