I need some serious help. About 5 years ago I used the expertise in this forum to help me setup a sweet home theater (at least within my budget ). Well since then I have mainly been a lurker just popping in from time to time to read about current issues and try to lend a hand when I had some interesting info. This time I need to try to figure out what the heck is going on with my subwoofers. Description of problem: At about 6am Sunday morning, my wife and I jump out of bed when we start hearing a loud rumbling in the house. After about 40 seconds of running around trying to find out where the noise is coming from we realize it’s the subwoofer in the basement. Nothing else is on, not even a light. The subwoofer is just hammering/firing away at full volume (louder than I have ever heard it during any movie). We turn it off and deal with the now awake baby – so much for sleeping past 7am. Why on earth would a subwoofer start going off like that? It was in standby mode, and had been for months, since we use it almost every night. Well tonight I tried turning it on again and it just starting hammering away the instant it came on. Then I unplugged it from the Receiver and turned it on – same thing, it just hammered away. Then I moved it over to another outlet, still unplugged from the receiver – it still hammered. What should I do with this thing trash it? Strange, but true, information: Back in 1998, I purchased a JBL PSW-D112 powered sub from my local Best Buy. In November of 2001, the subwoofer started doing this hammering thing (firing with no other equipment on). Since it was still covered by the extended warranty, I took it back for repairs. After 8 weeks I began calling them every week for an update. Each time they said that it just JBL was waiting for the parts to fix it and it should be back in a week or two. Well after 5 more weeks (total time over 3 Months), I spoke with the manager and he said that he would call the next Monday and tell me where we stand. Wednesday of that week, I called him again, and they said it had been fixed and would be ready for pickup next week. The next week (almost 4 Months with out a sub now), I called and he said that JBL had lost it. WTF!?!?! They couldn’t find the thing and that weekend I had them replace it with a new JBL PB12 ----only 9 Months have passed and that is subwoofer I am writing about. Both subwoofers were using the same APC SurgeArrest (and my Receiver, DVD and TV use it also with no problems). Equipment Details: Pioneer VSX-D608 (Receiver) Pioneer DV-C503 (5-Disc DVD Changer) Toshiba VCR (its HI-FI stereo though) Zenith Cable box (courtesy of COX cable – ok, I still got cable, don’t laugh) Toshiba Cinema Series TP61G90 (61 inch progressive scan RPTV) JBL PB12 (powered sub) – THE PROBLEM. JBL speakers for all other channels (they are all matched and have had for years). Using a standard APC SurgeArrest power strip for all of these (except cable box) Sub Connection Details: I was using a standard “Monster Cable Subwoofer cable” (RCA Connections) straight from the Receiver “subwoofer output” to the “line level in L” on the subwoofer. The LFE was set to “ON” and the Receiver was configured correctly (Sub ON, and Front speakers to SMALL). I checked this but have since changed them back to Sub Off and Large for the front speakers (as my sub is now dead to me). If you need any additional information, please ask me. Otherwise I plan to pay a special visit to Best Buy and speak with the stores manager this weekend. Thanks in advance. Rick.