Okay I have a serious question.
How many watts before you have to start adding extra batteries and stuff?
I have two 15s and two 1500 watt amps can I just hook that straight up to my battery and be fine?
My friend who competes said if it dims my lights to add an extra battery is that true?

You need more Batts and a h/o alt

250a alt and a good batt should be good

Get a condenser if you have to

if you get a h/o alt and batt then i would also consider a "Big 3 upgrade"

If you want to improve the quality of constant RMS, for sure big 3 and alt rebuild that produces more current would be in store for anyone who is anyone in the audio world.