Measured power output: 300 watts RMS into 4 ohms @ 90 dB Input sensitivity (@ low level): 210 mV/50 Hz Input sensitivity (@ high level): 3.0V/50 Hz Low pass adjustment: 40 Hz to 200 Hz Phase adjustment: Continuously variable from 0º (normal) to 180º (reverse) Built-in subsonic filter at 30 Hz Power requirements: Switchable, 115/230 VAC, 50/60 Hz Dimensions: 10" W x 7-3/8" H x 2-1/2" D; Cutout dimensions: 9-1/4" W x 6-5/8" H