[project89]

if hes just buying a cap cause the lights dim or he keeps killing his battery,the cap wont do any good. and u need a .5 farad cap for every 1,000 watts the amp pushes.so if he has say a 100-1000 watt amp he dosent need anything more then a .5 farad.most places will try to sell u something much bigger.and be carefull when u charge the cap for the first time if u do it without the resitor the cap can explode in ur hands/face.and after its installed if ya ever work on the amp cables or around the cap take the fuse out of the power cable and short the 2 terminals of the cap with a junk screwdriver or something.u do not want to get zaped by a capacator.besides hurting really bad and cauising sever elc burns.most store enough to kill u