pooped, b0rked, fUkt, dumped, toast, fried, blown, garbage, destroyed, done...
these are all synonyms for- broken.
check all the speaker and amp terminals, and make sure the wires arent shorting out anywhere, check your ground, and make sure its as good as possible (bare metal & super tight) check to make sure your amp is not mounted to a metal surface (sometimes it shorts the amp) and do an overall check to make sure everything is ok.
but first, take out the fuse to your power wire for a day or so. then try again (after youve checked all this)