Hey guys, thanks. After I posted, I took out the Rowland Capri preamp from my HT system (had used for 2 chnl)and that did the trick for all speakers except for the sub. The sub has had hum for a long time, and has been plugged into a Monster 5100 PC and now a separate dedicated Furman. Don't know what the deal is with the sub, however, disconnecting the sub's IC eliminates the hum.
HELP: how to eliminate speaker HUM?
I've developed a nasty, fairly loud hum from all five speakers in my HT setup as well as my sub. If I turn off amp, all humming stops. If I disconnect IC from preamp, that channel/spkr hum stops. Is this ground loop hum? (I've heard of this but don't know what it means). I've heard there may be devices that stop the hum ("humbusters"?). Please help. Thanks..Jeff