Thanks Dan. I don't believe it's a ground loop problem as I've tried everything with the same plug in. Then again I may be wrong. I have 4 dedicated 15 amp circuits to the breaker box and 1 20 amp. I have tested 1 component at a time and the hum may be a little less noticable with only my front amp connected. I have an Arcam BDP 300, LFR100 DSP, PS3, SVSSB13 sub, Arcam P777 amp, Arcam P1000 amp, Marantz 7701 pre/pro, and a 60" plasma TV in the loop. If the hum was coming from the speakers instead of the amps themselves would that be a ground loop issue? Thanks again.. Also, I know power conditioners don't do jack with these problems but I have 3 in the loop as well.
Last edited by JBrad; 03/23/17 11:37 PM.