When i had my sub hooked up to a rockford fosgate 600watt 2 channel amp, and speakers on a rf 800.4 amp.. my sub recently started popping when i turn on the car, was been told amp turns on befor the headunit. well i took the 4 channel amp out and its now hooked on to the speakers, now my speakers pop.. how is it possible for my amp tot urn on befor my headunit? i checked that wheni turn on the key, BEFOR my headunit turns on the amp turns on real fast automatically, can someone help> thankx