Thought I would add my story to this thread at Big's advice.
I too had a buttkicker go up in smoke last year. I had bought two Buttkicker amps along with my order of HT seats. I was leaving them turned-on all the time since they automatically shutdown when no audio signal is present.
So last year, we were awaken in the middle of the night by our house's smoke detectors. The house was full of dark smoke, and the Fire Dept. found the source to be one of Buttkicker amp's. One of the fireman pulled the cover off the amp, and the entire power supply was melted:
The second amp, which was sitting next to it, was also damaged due to the heat from the smoldering fire. Luckily the smoldering was contained and nothing caught fire. The damage was simply smoke damage (block soot all over the HT) and a horrible, acrid smell of burnt electronics that lasted a number of weeks.
To the credit of the Guitammer Company and their CEO (whom I called and spoke to after the incident), they replaced both damaged amps free of charge despite them being both out of warranty.
I've since then added an automatic power on/off circuit that gets triggered by the AV Preprocessor, so that A/C is shutoff to the amps when the AV gear is not being used.
Hope this helps others on this forum