Amp 4-channel car amplifier 60 watts RMS x 4 at 4 ohms (90 watts x 4 at 2 ohms) 180 watts RMS x 2 bridged output at 4 ohms (4-ohm stable in bridged mode) front channel high-pass filters (50-200 Hz at 12 dB per octave), rear channel high- and low-pass filters (50-200 Hz with 12 dB/octave high-pass and 18 dB/octave low pass)