JL Audio 600/1v3 600W x 1 Subwoofer Amplifier

600W x 1 Subwoofer Amplifier 600 watts RMS x 1 at 1.5 to 4 ohms,preamp and speaker-level inputs,variable low-pass filter (40-200 Hz, 12 or 24 dB/octave)

Crutchfield