Calling all EE's!!! Trying to get rid of a ground hum and hoping you can point in the right direction. Here's the situation. I have a new amp that is giving me a ground hum, but only when the interconnects are hooked to my Denon receiver. The hum goes away when I put a cheater plug on the amp, but I don't want to leave it that way. The Denon uses a 2-prong plug. I've plugged the amp and the Denon into several different outlets on different circuits and the hum persists. I also remove