I've had my Paradigm PW-2200 for just under 4 years now. Last week, I noticed some sound coming from the tweeters of all my speakers that was there no matter what source and whether the volume was off or on. Sounding like a humming/buzzing interference, I assumed it had to be my panamax sp or antenna, or something. Through a series of plugging and unplugging everything, I found it was the sub plugged into the panamax that was causing the problem. Next, I went directly to the outlet with the sub - the same one the panamax was plugged into and the sound was still there. So, I then plugged the sub into the receiver and the sound stopped. Awesome. About an hour later, I noticed that the little orange power/signal light on the sub was off....and so was the sub. When I flipped the switch from "auto on" to "always on", the light came back on, but no sound is output. Here's where it gets interesting. When I leave the switch to "auto on", the light stays on for a while then goes off - but no sound is ever heard. When I flip the switch to "always on", the light stays on all the time, but no sound is heard. Regardless, no sound. Was the interference a way of telling me it was about to die??? So, do ya'll think its my 4yr old PW2200 subwoofer or my 4 week old 74txvi? The warranty with their subs is 3 years, its been almost 4. The local dealer (which is not where I bought it) said they would remove the amp and send it back to Paradigm - but that I would have to pay since the warranty is expired. I have no idea what this will cost. And, because I live in Texas, but bought the sub in Vancouver, BC (from an auth dealer), the local dealer said the warranty isn't valid anyway because its out of its contry of origin. Any advice or help is appreciated on this one, I'm clueless as to what to do.