Kenwood Excelon KAC-X20 2-channel car amplifier 180 watts RMS x 2 2-channel car amplifier 180 watts RMS x 2 at 4 ohms (260 watts RMS x 2 at 2 ohms) K-STAT transistors with instantaneous temperature control variable high-pass filter (40-200 Hz, -12 dB/octave) variable low-pass filter (40-200 Hz, -24 dB/octave)