Originally Posted by mizturyous
A capacitor will not stop your alternator from going out in the case of too much amp draw. Just hook it up and see how your cars electrical system does overall with it playing and your lights,AC, or whatever on to see what kind of strain it is going to put on your car. Try using a multimeter on your battery while doing so and see what your voltage drops to. If it goes below 11.5 or so you may want to look further into other options. It will be better on your car and your system in the long run.
I look at it like this, a good cap will run you $100-$150, a high output alternator will run prolly $200-$250, the cap MIGHT take care of the problem, the HO Alternator WILL take care of the problem. Seems like a no brainer to me.