QUOTE (kckid)
That my freinds is why you have a cap. Like the other post says under most applications you sont need one. But with that high of a powered system you do. The cap stores wxcess electricity and releases it only when there is a drain. Thats why its used to deep the lights from dimming. It also helps protect overworking and overdraining of your battery and alt.
Actually, a cap does *not* protect against overworking or overdraining batt/alt. If anything, it would *increase* the amount of work on your alternator, as it is yet another device that requires power. A cap is nothing more than a reservoir (read: battery), that discharges energy quickly to a device, during times when there is not enuff being supplied. Typically, this occurs during prolonged or heavy bass.