okay, so I unplugged the denon from the wall, and there is still vibration and hum from the woofers.. as long as the sub cable is connected to both the receiver and the sub, it doesn't seem to matter if there is current going to the denon or not.

Does this mean anything?

- Majik

Epic 80 system
Ep 800
Denon 3808
Optoma HD20
PS3
vp180
extra QS8s (to come soon)