Features High output 12" subwoofer With Built-in 300 watt amplifier RCA low level inputs High level (factory radio)inputs Selectable 0°/180° phase switch Separate low level and speaker level inputs Variable bass boost EQ @ 45Hz Variable 12db/Octave low pass crossover Audio Sensing auto remote turn on/off function Thermal and over/under voltage protection Remote bass level control included Detachable large Power/Ground input connector High grade vinyl covering Heavy Duty multi-layer MDF construct