ok so my buddie just bought 2 12 inch diamond audio d9 subs and 2 d6 1500.1 amps....when he turns it up past 22 the car starts to run like shit and sometimes it dies..we only have one of the amps hooked up until we find out the problem... we have 0 gauge ran from the batt. to the amp, but no big 3 yet... do you think the big 3 will fix this problem? if not what should we do? ive been hooking up systems for about 8 or so years now and ive never ran accros this... thanks in advance to anyone that can help