Originally Posted by samakaballer
idk it might be circuit city ppl r stupid but they said that all a cap will do is keep your lights from flickering when u bang the subs ,, that's all ,, and my lights never flicker lol
Sorry, if you don't have some sort of battery isolation, and your 1800 watt amp doesn't make your lights dim, you don't have an 1800 watt amp.
Even at 100% efficiency, and 14.4 volts (of which you probably have neither) 1800 watts is 125 amps. With a 130 amp alternator, that only gives you 5 amps to run the engine, AC, lights, etc. There will be a voltage drop, and that will make your lights dim. At a more realistic 65% efficiency and 13.5 volts, your looking at over 200 amps of current.
Toby