I got my sub hooked up to the headunit yesterday.... the previous owner who put in that headunit didn't even know the sub wasn't hooked up. Go figure. But anyway, since i don't have a manual, and i don't really know anything about car audio, i was wondering if you guys could help me out as to what the different switch things on the side of the amp are for. I just wanna make sure its not set WRONG, so that it won't hurt something, and of course i'd also like to do whatever i can to get the best sound quality. Thanks!!