Sony XMGTR2022 2/1 Channel GTR Series Amplifier (Discontinued by Manufacturer) 600W x 2 Max Power Output 202W x 2 into 4 ohms, 20Hz-20kHz, 1.0% THD Variable 50-300Hz Lo-Pass Filter -12dB/oct Selectable Slope 250W x 2 into 2 ohms, 20Hz-20kHz, 1.0% THD