'MB Quart compact 400 watt mono Powersports amplifier to for a subwoofer with on-board equalization and simple instalation with quick release connectors. Bass remote included Specifications CLASS Full Range Class D VARIABLE VOLTAGE 0.2V~9V SIGNAL TO NOISE RATIO>100dB FREQUENCY RESPONSE 10Hz-300Hz CROSSOVER TYPE Electronic 12dB Per Octave CROSSOVER FREQUENCY RANGE CH1 & CH2 Switch Low Pass 300 Hz BASS BOOST 0-12dB@45Hz SUBSONIC FILTER 60Hz POWER @ 2-OHMS 1 x 500W POWER @ 4-OHMS 1 x 250W TOTAL CHANNELS Mono AUDIO INPUTS RCA POWER TERMINAL 12V/GND Molex 10 ga SPEAKER TERMINAL WIRE GAUGE Molex Plug Connector FUSING 1 x 30 Amps CERTIFICATIONS Marine & Powersports DIMENSIONS 3.70 X 5.51 X 1.77 in 9.4 X 14.0 X 4.5 cm WEIGHT 2.09 lbs (0.95 kg)'