Pioneer Gm-D8400M Mono Amplifier With 1200-Watt Max Power Mono subwoofer car amplifier 300 watts RMS x 1 at 4 ohms (600 watts RMS x 1 at 2 ohms) Variable low-pass filter (40-240 Hz) Wired bass control (variable 0 to 12 dB boost at 50 Hz) Preamp- and speaker-level inputs