i just bought this amp about two months ago, and the pills that were in it were 4xsrf2072. are these the "stock" pills that go in the amp when new? what can i put in to replace them? also, when i got the amp, it put out 800 watts. then, without doing anything to the amp, it went down to 300. then it just wouldnt work at all. does anyone have any schematics, tips, or anything so i can return this amp to its former glory? :headbang