Amp is the PE 300-792. I modified the boost on this amp to provide 1dB of boost from 25-30hz and have an Fc of 17hz. You can see pictures of the solder job and the sub it powers on my website linked to in my sig. The problem is the amp doesn't seem to work anymore. The situation that lead to the amp not working is as follows. Finished setting up my older speakers at my parents place (the sub was there already and had been working fine). Calibrated with Avia to 10dB under reference. Proceeded to play Matrix for demo material after calibration. Played lobby scene, followed by chain gun, followed by helicopter explosion. Halfway through the lobby scene I turned the volume up a bit more (I'm confident no more than 5dB increase). When the big rumble part of the helicopter explosion was about to hit the bass quit. Turned the amp off and let it cool for a while, tried again nothing. Left the amp in the auto/on position over night, tried again this morning nothing (well almost nothing, when I turn the amp from off to on I get about half a second of muted bass). I pulled the plastic cover off and the, not sure of the correct term, the heavy solid black thing that the power from wall connects to (the transformer?) was still warm. So I put a fan on it and cooled it off. Put it back together and tried again, same as before. Finally figured out were the fuse was, checked it and it's fine. So then I pulled the amp apart again and took a closer look at the circuit boards. Didn't see anything that looked wrong to me on the preamp board, but something looks to be wrong on the amp board. How wrong I don't know. I snapped a few pics: http://dustin.bunnyhug.net/forum/board.jpg http://dustin.bunnyhug.net/forum/close1.jpg http://dustin.bunnyhug.net/forum/close2.jpg How bad is it?