Hum issue - driving me more crazy

Rwwear - hum started at time of new XOVER. BUT this was also same time that I "buried" the IC's under the floor and got new IC's. Thus multiple simultaneous changes. IC's above floor are great.

Ozzy - No TV or SAT in system - LP, DAC and CD player are only sources

BALANCED cables has fixed all issues even allowing me to use the dimmers in the room without a peep. Even slight hum in Vinyl subsystem (2 chassis phono preamp) is gone.

I don't know enough electronics to understand what "I fixed" (or more likely unbroke) but the end results are outstanding for about $120.00 worth of cable and connectors. All I can say is in my application/room/system -> Balanced IC's are great.

Thanks to all. Have a memorable Memorial weekend

Yeah, if going balanced fixes it, go for it. It could take a long time to figure out what is happening. Enjoying music is much more fun. ;-)

Always use balanced mode when possible. More equipment should be balanced.

PS Audio has something called a Humbuster (now version 3).
Never tried it.

Humbuster is specifically for removing DC from your AC line. So it will solve problems of transformer hum coming from the chassis of an amp, etc. But doesn't address the sources of hum that come out of speakers.

Great device if DC on the line is your problem, as it was for me at my old apartment.