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I'm still wondering what kind of load you're presenting to the amp. I ran a sony explode amp in one of my systems pushing fosgate 12's with a 2ohm load and it caused the amp to overheat. After doing that for a moderate period of time my explod eventially exploded. 1 month out of warranty of course.
pham- if your head unit is shutting down from bass, you need to check your battery or alternator, i bet your battery is on it's last leg, just b/c it starts the car doesn't mean it is not bad, i had the same exact problem, new battery=no more problem for me


