OK, added an amp (AM-9080) to my Denon 3802 and now have a nasty ground loop hum. Disconnecting the cable from the back of the TV makes it go away, however, it's hard to watch TV this way... So, I checked outside and the cable grounding block wasn't connected to anything, so I ground that to the same place everything else is grounded, which helps, but the hum is still there and still goes away when disconnecting the cable. I know cheater plugs are a no-no, but I get to thinking... How about if I get another cable grounding block and run a line of speaker wire from it to the ground screw on the back of the amp?? I think this would fix the hum, but would it be safe? I've searched here and it seems one solution for the hum is to do the single speaker wire thing connecting amp - vcr - sat box. What I'm proposing kind of does the same thing but I don't want to get zorked down the line either. Thanks, Brian.