get yourself a $20 multi-meter at the local hardware store (very handy tool to have -- not just for car audio). Start your car. Check the voltage at the batt. Learn something.
my amp tells me how many volts its getting cause its pimp =x but i get about 14.2 untill i turn it up then it goes down to 12.2 - 12.7 i need another batter or a power cap.
Mine runs at 15.5v for some reason. Doesn't really matter to me since my amps are reg'd., but my headlights sure are bright. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif