I have a 2004 Mazda RX-8, with two Sony Xplode amps pushing 500 watts a piece, hooked up to four speakers. I'm having problems with one of the amps kicking off after around 5 minutes. I can turn the car off and start it again right away and the amp works fine. I've checked the wires and fuses, but I can't find the problem. Anyone ever had this happen to them, or have a suggestion on how to fix it? Any help would be appreciated, thanks.