Hi,

I posted a question within a post below and have received no response. I have a system problem that's driving me nuts. A few days ago, while listening to TV through my home theater system, my sub started humming very loudly. I think it was a 60 cycle hum and it started out loud and got louder by the second. I unplugged the sub, plugged it back in and everything was fine, for a day, till it happened again. It's not a problem with the sub, because I bought a new sub on the weekend and also replaced the cable with a Monster Cable patch cord. So last night, with the receiver off, or in standby mode at least, I stuck my hand into a port on the sub to feel how large the driver magnet is and as soon as I touched the magnet this huge hum came through the system. I must have activated the sub's auto-on function. Now every time I plug the sub in there's an instant superloud hum and it won't stop. Before I go to all the trouble of disconnecting my Denon AVR-1603 receiver (still under warranty) and driving it 40 miles back to the shop, can someone shed some light on what's causing this problem and why it is suddenly occurring after many months of flawless operation? Many thanks!