I'm a total noob to this. Hell, I wouldn't even call myself a noob cuz I'm not into this stuff. but lately a friend beens telling me that he wants a 300 watt speaker in his car.

I was wondering, can you really get 300 watts in a car which has a voltage battery of 12 volts? And would you be able to get this wattage in RMS?

Is there some kind of fine print I don't know about?