Quote Originally Posted by _nick_ View Post
yeah that's alot of bla bla bla i can go ahead and point out several critical mistakes that post....basically, when you simply do not have enough power because you have taken more power than your alternator can produce, no battery or cap will save you. You have to stop the power consumption and get the battery charged back up to maintain voltage.

But when your electrical system has plenty of power available for your amplifier but cant deliver it 'quickly' enough.....a cap does one simple thing...stores the energy for brief moments when the amp draws more power than what would regularly be available in your electrical system. That's it, there's no magic to a cap. A fast discharging battery. A cap can maintain its output voltage down to 20% charge. It simply buffers out light dimming/flickering with hard bass notes. It does nothing more.
but once a cap is discharged it has to recharge, therefore putting a bigger strain on your alt in a time your system needs the current.