So I have a 2013 Honda Accord Sport with a single 12 inch sub with a kicker cxa doing 600 watts rms. This system dims my headlights. I just bought a dd712(D2) i plan on installing along side with a dd dm1500a which does 1500 watts at 1 ohm this is double the wattage from my old system so i know i have to upgrade one of the two and maybe even get a capacitor. I've called different car audio stores asking what I need to get upgraded some say i need alt. And battery uprgraded, some say I need just a battery, some say i need just an alternator. Can't figure out why i can't get just one flat answer. I don't know much about car audio but any info would be great. Here are some specs to the amp.
Cont Wattage @ 1ohm1500
Dynamic Wattage2300
Max Current Draw - Amperage230