Ok, so I've had and taken care of these speakers for years now. Suddenly I start hearing a low hum (past 3 days now) and it wasn't until today that I had the time to trouble shoot this problem. So I figured maybe it's just getting interference from my other audio equipment right? I mean I don't know why suddenly when it hasn't had that problem before. I disconnect it and try several other outlets. Problem persists, I even connected it outside the room, ran speaker wire all the way to the reciever (speaker being AWAY from all the electronics) and I still get the same hum coming from the amplifier once it automatically comes on. Even disconnecting the speaker wire (signal) the hum remains until the amplifier shuts its self off during auto-detect mode. The only time it goes away is either when it's actually off/disconnected or when I touch the speaker wire/plate (either negative or positive) with my bare finger and my other finger on the back plate of the amplifier at the same time. What do you suppose this indicates? I'm no audio/electrical guru so any advice/etc will be appreciated thanks!