Something of note... when I disconnect the sub cable from the back of the Denon... the vibration stops of course... BUT if I am still touching any metal part of the denon while I holding the plug in the other hand the problem vibration and humming are still present.

Could it be a setting in the denon?

- Majik

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