Sony XM-2002GTR 2-Channel Amplifier 2-channel car amplifier 200 watts RMS x 2 at 4 ohms (250 watts RMS x 2 at 2 ohms) 500 watts RMS x 1 at 4 ohms (4-ohm stable in bridged mode) low-pass crossover (50-300 Hz, 12 dB/octave) variable bass boost (0-10 dB at 40 Hz)