New Rockford Fosgate R500X1D 500W Mono D Car Amplifier Audio Amp + Remote + Cap New Rockford Fosgate R500X1D 500 Watt Mono D Car Amplifier 250 Watts x 1 @ 4 Ohms 500 Watts x 1 @ 2 Ohms 333 Watts x 1 @ 4 Ohms 0 Res 647 Watts x 1 @ 2 Ohms 0 Res