I just put in my system with a buddy a couple weeks back. I've got a Punch amp and 2 12's. After driving in the heat for about 10-15 minutes, the subs will shut down. After a couple minutes they'll then come back. I assume the amp is overheating, is the only fix a fan? If so, how do I mount a fan? The amp is mounted on the back of the rear seat, btw. Any help is appreciated, as it's driving me nuts.