Boss CX1100M Chaos Exxtreme 1,100-Watt Monoblock MOSFET Power Amplifier (Discontinued by Manufacturer) Amplifier Class: Class A/B Technology: MOSFET Number of Output Channels: 1 Total Power: 1100 Watts Max Power @ 2 Ohms: 1100 Watts x 1 RMS Power @ 4 Ohms: 250 Watts x 1 Frequency Response: 9 to 50000 Hz Total Harmonic Distortion (THD) @ RMS Output: 0.01% Signal-to-Noise Ratio (SNR): 103 dB Minimum Speaker Impedance: 2 Ohms Variable Low Pass Crossover: 35 to 160 Hz Dimensions: 2.625"" x 10.5625"" x 11.875"" Soft Turn-On Circuit Thermal Overload & Speaker's Short Protection Remote Subwoofer Level Control Power & Protection LEDs Input Sensitivity Selector MAX POWER, 1 OHM, N/A; MAX POWER, 2 OHM 1100w x 1; RMS POWER, 4 OHM 250w x 1; MAX BRIDGED POWER, 4 OHM N/A SIGNAL-TO-NOISE RATIO, &gt; 105 dB; THD, 0.01% DIMENSIONS: 11-7/8-InchW x 2-5/8-InchH x 10-9/16-InchL Remote subwoofer level control; Line and speaker level inputs; Variable gain control; Input sensitivity selector Variable lowpass crossover; Power and protection LEDs; 0-+18dB selectable bass boost; MOSFET power supply