Caps, and High Output alternators both will satisfy what you are trying to do, especially if you have a brand new battery. A high output alternator will sustain all you throw at it when the bass hits. If you get a cap, the alternator has to work harder to charge both the cap and the battery, and it will work harder, and die sooner.
Thats why I'd get an alternator, personally.
Me though, I have HID's and an Optima Red Top battery. My headlights don't dim with HID's, but the gauges occasionally do, which is fine with me.
Thats why I'd get an alternator, personally.
Me though, I have HID's and an Optima Red Top battery. My headlights don't dim with HID's, but the gauges occasionally do, which is fine with me.

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