i kno ppl dont like em but run atleast a 1f cap, i had a ma audio hk400w amp runnin 2 audiobahn 12's in my geo n with a amp of 30amp fuseing and a 75amp alt my car still shut off, i hooked up my cap n problem solved, big three doesnt relly help current flow to the amp just to front battery, kinda why other ppl run 2nd batterys n what knot, somethin has to give sufficent power to sub amp somewere, n a cap can hold up to around 1000w, i ran my 1f cap in my system befor i got my other battery n i got little to hardly any light dimming but i was runnin @ 1ohm on a 1ohm stable amp
but seriously caps do work for smaller systems of around 1000w or less, its just like runnin a lil battery n is worth the money, this has solved my problem many times, and i still have one in my geo, but its old n ima get a spl one off here shortly, caps aint bullshit like other ppl say they are, they do work, just not for around a 12kw ground pounder, and big three does help to, i done it on my geo n went from 13.0v to 14.6v at idle, and unless ur runnin stock stereo run ur remote wire off ur headunit instead of car acc wire, helps alot to
and on ur car wantin to cut off, the idle might be to low, i gotta addjust the idle speed on my geo here shortly cause it wants to cut off but i press the gas just the little bit n it runs fine