mono subwoofer amplifier 300 watts RMS x 1 at 2 ohms ( 4-ohm rating unavailable) variable low-pass filter (32-320 Hz, 12 dB/octave) variable bass boost (0-12 dB at 40-100 Hz) variable phase adjustment (0-180°) preamp and speaker-level inputs fuse rating: 15A x 2 wiring and hardware not included with amplifier