I have a 1600 watt amp that is powering 2 12inch subs in a bandpass box. The amp is bridged and the subs are running at 4 ohms. I dont have any major problems with lights dimming or flickering but I want max power going to my amp, without taking power away from other electrical parts of the car. I am still using the factory alternator. How do I know how many farads I need for my system. I dont think I really need them but I was just wondering how to figure out how many farads are needed.