Kicker DXA250.1 amp hi / lo setting

Never used in vehicle brand new mono subwoofer amplifier 125 watts RMS x 1 at 4 ohms (250 watts RMS x 1 at 2 ohms) CEA-2006 compliant variable low-pass filter (50-200 Hz, 12 dB/octave) fixed subsonic filter (25 Hz, 24 dB/octave) variable bass boost (0-12 dB at 40 Hz) Class D amp technology differential-balanced inputs eliminate noise from your vehicle's electrical system preamp inputs and outputs speaker-level inputs (require speaker wire to RCA adapters) Other Features optional remote level control available 8-gauge power and ground leads and a 40-amp fuse recommended — wiring and hardware not included with amplifier no onboard fuses — when installing multiple amps in a system, an additional 40-amp in-line fuse between the distribution block and the amplifier is recommended 8-1/8"W x 2-3/8"H x 7-1/8"D warranty: 2 years (extends to 3 years when purchased with a Kicker 8-gauge amp kit or multi-amp kit)