First off keep in mind haven't really messed around with Car Stereo in over 10 yrs. Know lets get down to it my car will be payed off in a few months and i want to get back into SPL competitions. I plan to get 4 Sundown Audio SAZ-3500D, 4 BTL N312 Subs, 220 AMP Alternator, & Harrison Labs Flux Cap my question is I am not sure on what batteries and how many I should run.
