Rockford Fosgate Mono Amplifier 400x1 @ 4-Ohm, 800x1 @ 2-Ohm, 1200x1 @ 1-Ohm

Prime Series mono subwoofer Class D amplifier Infrasonic Filter: Variable 15-50Hz 400 watts RMS x 1 at 4 ohms 800 watts RMS x 1 at 2 ohms.