Front Channels:100 W RMS x 2 @ 1.5 ohm-4 ohm(11V-14.5V) Rear Channels:25 W RMS x 2 @ 1.5 ohm-4 ohm(11V-14.5V) Subwoofer Channel:250 W RMS @ 1.5 ohm-4 ohm(11V-14.5V) THD at Rated Power:<0.03% @ 4 ohm (F&R),<0.05% @ 4 ohm (Sub) S/N Ratio (F&R):>108.5 dB below rated power S/N Ratio (Sub):>95 dB below rated power Frequency Response (front and rear):5 Hz-30 KHz (+0, -1dB) Frequency Response (sub channel):5 Hz-500 Hz (+0, -1dB) Damping Factor (front and rear):>200 @ 4 ohm/50 Hz Damping Factor (sub channel):>500 @ 4 ohm/50 Hz Input Range:switchable from 200mV-2V RMSto 800mV-8V RMS Dimensions:19.7"L x 9.25"W x 2.36"H