ive got a Kenwood KAC-9102d amp
mono subwoofer amplifier
500 watts RMS x 1 at 4 ohms (850 watts x 1 at 2 ohms)
variable low-pass filter (50-200 Hz at 24 dB per octave)
variable bass boost (0-18 dB at 40 Hz )
subsonic filter (15/25 Hz, 18 dB/octave )
top-mounted controls
Class D design...