you need to buy an AC/DC converter. The HU will draw 10 amps and a 500 watt amp will prob draw around 50 amps. So lets say 75 on the safe side(dont want over heating). http://shop.store.yahoo.com/soundsdirtcheap/12vposu.html But you will end up paying about 200 + for the converters unless you find them on ebay or elsewhere. Besides why do u want to hook up all that in your room. And i hope you dont plan on using a car sub or box alignment in your room. Home audio is a whole different ball game.