I bought a Sony SA-WM40 subwoofer about a week ago and I hooked it up via RCA jack on my Denon 2802. I set all my speakers to small, chose yes for subwoofer, set the crossover on the receiver at 120hz and left the LFE level at 0db. I set the crossover on the sub at 170hz which is the highest allowed on the Sony, and I set the phase at Normal (the options being normal and reverse). The level is at midway and when I set it up through Avia a week ago everything was okay and I was getting sound out of the subwoofer. Today, being about a week after I bought the subwoofer, I played Braveheart and no subwoofer sound even when setting my receiver at 75db. Tried the Avia subwoofer setup and no sound coming from the subwoofer at all. Tried the receiver test tones and no sound coming from the subwoofer at all. Tried to set the crossover on the receiver to 80hz and that didn't help... i don't know if it should help or not. When the subwoofer was working I never played it loud so there's no possible way that it could of blew. Is it possible that the auto/off on the Sony sub turned the sub off for good? By the way the Sony light was green when i was trying the test tones and the Avia setup and I haven't changed any of the cabling from the receiver to the sub. I am totally perplexed... if anyone could help I'd appreciate it because I really would like some bass from my movies. Thanks.