Ah, I was about to say lol. My friend had one with two Boss 12's in his car and it didn't sound great. He's changed to Memphis though, so it does sound better...not the best, but better. Boss is down there along the lines of Sony and entry level Pioneer.
Maybe your alternator was due for a while? Plus, doing big 3 in 2ga with batteries running 1/0 may not be the best idea.