Hum From Speaker

Before you waste hours and assuming you can lift that beast....take it to a friends house and see if it hums there. You either have a ground loop, something causing noise on the line, some transformer still plugged in near your amp causing interference...or you have an internal amp problem.

You've already eliminated the real easy things. Finding ground loops and noise sources can be very tedious....so first find out if your amp is OK.

Ghstudio

Thanks for your reply.

Do not have a friend's house that I can test my amp, but the ebay person I brought the amp from said it was dead quite at his house.

If only the amp is plugged into the wall, how could it be a ground loop ground?

Also wouldn't using a cheater plug as a test rule out ground loops?

When I think about it; I have three refrigerators in my house, maybe they are causing main line pollution?

I just ordered the Powervar ABC-1200-11 and I hope it will help. If that doesn't work I may take the amp to a repair shop to be tested.

My Denon 1906 Receiver was dead quiet in the same location, does that mean anything or is the technology completely different for those products?

make sure you do all your testing within 60 days so you can file a claim against the seller if you find that what he claimed isn't true. Some EBAY sellers are known to stretch the truth or claim dumbness....although most are very honest.

If your denon was dead quiet, then the amp you bought is suspect. However, disconnect everything you can in your house or turn them off and see if any of it makes a difference.