Boss CW1100M Chaos Wired 1100 Watt Mosfet Monoblock Power Amplifier with Subwoofer Level Control MAX POWER, 1 OHM, N/A MAX POWER, 2 OHM, 1100 Watts x 1 RMS POWER, 4 OHM, 250 Watts x 1 SIGNAL-TO-NOISE RATIO, &gt; 105 dB; THD, 0.01% DIMENSIONS: 11-5/16-InchW X 2-3/8-InchH X 9-1/2-InchL