Brand New!!! Never installed. Still in original packaging 

Product info:

• mono subwoofer car amplifier
• 300 watts RMS x 1 at 4 ohms (500 watts RMS x 1 at 2 ohms)
• 300 watts RMS x 1 at 1 ohm
• CEA-2006 compliant
• variable low-pass filter (50-400 Hz, 12 dB/octave)
• variable bass boost (0-12 dB at 50 Hz)
• variable subsonic filter (5-30 Hz, 24 dB/octave)
• optional remote level control (RUX-KNOB)
• Class D amp with MOSFET power supply
• preamp and speaker-level inputs
• fuse rating: 30A x 2
• 4-gauge power and ground leads recommended — wiring and hardware not included with amplifier
• 9-15/16"W x 2-5/16"H x 9-1/16"D