I've had a minor ground loop hum for as long as I can remember. I can't hear it unless the volume is turned completely off and it doesn't get louder with the volume. It occurs when the amp is on even if all the other components are turned off. I've completely changed components from SS to tube so I'm confident it's not equipment related. I've read alot of the threads so I've done most of the suggestions except trying the 2 prong adapter which I prefer not to use unless the hum is going to harm my speakers.
I unplugged everything in the house except the stereo, didn't help.
I turned off all the breakers except the stereo, didn't help.
I used an extension cord to try different outlets even in the garage, didn't help.
I don't have cable so that shouldn't be a issue.
I put a new 8' ground rod in the ground, didn't help.
I've tried Monster and Panamax conditioners, didn't help.
My friend that is an electrician says it's probably a loose ground wire in one of the outlets, switches, lights, ceiling fans, etc.
Can anyone think of anything else I could try?