hispls 5,000+ posts
CarAudio.com Veteran
You probably won't drop much lower than 11v since most head units will just power off down that low and possibly your car will stall as well. Very bad for your amps. I'd suggest a couple extra batteries to safely run 3KW 1 really ballsy one at least.well luckily i have my battery in my trunk, so a couple runs of 4 gauge for my current amp only cost me about 30, plus i probably got a good deal cause i go to a local shop that is actually legit and not one of those ones thats just out to make a quick buck, i only drop to 11.3 at the lowest, and that has only happened once, how low would it drop with the extra watts? i can see upgrading the battery(s) definitely but idk about an alternator, im not looking for 14 volts, just close to 12