i disagree, if its hurting your electrical system, you need a high output alternator, a cap has to be charged, and is only gonna put more strain on your alternator. it may seem to smooth out the already weak system. your lights may stay continuously dim, unstead of dimming to the bass. trust me u need a HO alternator. don't buy a cap, it'll make your problems worse. it may seem to work great for a while, but if you run a high power stereo like this for long enough, your going to seriously screw your electrical system. you may just need a battery, i havent heard of the wipers cutting on, but seriously, you do not need a capacitator.
