you probably have an 80 amp alt, maybe a 90.I'm running upwards of 1700w right now to my system
stock alt, some interstate battery, and no big 3, I get dimming but its not too bad
Granted I dont know how many amps my alt is, cant bet hat much, its a jap car //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
Because I are teh nub.why would you get more batteries if your alt cant keep them all powered?