mufuqua

Buy a car battery isolator, have the xs charge only when you want too so you don’t drain the main battery. Your battery’s are probably made out of different charging components, like one might be a lithium battery, and one is an AGM. Those will drain each other. An isolator will help your main battery stay charged when off so you won’t need to jump your vehicle.

I’m running 9000w rms right now in my car with no capacitor or upgrades, it’s all stock, running off just the battery. You won’t really need any upgrades, but buying a capacitor will help with starving subwoofers. But your electrical system should be fine, 220a is good enough to run that electrical system for 2500w. So I recommend buying a capacitor, like a 2-fared capacitor. edit 2024: Don't buy a cap, they're stupid. Buy a second battery, preferably a lithium. And get a high output alternator, stock sucks, definitely can't do 9000 rms, the amount of times I had to jump my pos is crazy. Past me is a fuckin retard.