Quote Originally Posted by ZR1Vette09 View Post
I will say that I've heard good amps don't need a cap because wrms aren't demanding on the battery. Just keep that in mind, basically a capacitor is a cheap alternative to a second battery which I have seen run in high power systems. It also take a lot of power to really suck on your battery juice.
If I was still into stereos I would use a second battery like you said. It's easier on your alternator. Or use a higher power alternator or both. Caps are pointless IMO. I left the stereo crowd around '03 when I got into operating heavy equipment, and the last thing I want to hear is noise from speakers. Use a DEEP CYCLE BATTERY and a high power alternator if you want max power flow. Hide the battery if you don't want to see it due to its ugly appearance.