Boss CX650 Chaos Exxtreme 1000 Watts 4-Channel MOSFET Power Amplifier Amplifier Class: Class A/B Technology: MOSFET Number of Output Channels: 4 Total Power: 1000 Watts Max Bridged Power @ 4 Ohms: 500 Watts x 2 Max Power @ 2 Ohms: 250 Watts x 4 RMS Power @ 4 Ohms: 100 Watts x 4 Frequency Response: 9 to 50000 Hz Total Harmonic Distortion (THD) @ RMS Output: 0.01% Minimum Speaker Impedance in Bridged Mode: 4 Ohms Signal-to-Noise Ratio (SNR): 102 dB Minimum Speaker Impedance: 2 Ohms Variable Low Pass Crossover: 35 to 160 Hz Dimensions: 2.625"" x 15.625"" x 11.875"" Bridgeable Soft Turn-On Circuit Thermal Overload & Speaker's Short Protection Remote Subwoofer Level Control Tri-Mode Operation Power & Protection LEDs MAX POWER, 2 OHM 250w x 4; RMS POWER, 4 OHM 100w x 4; MAX BRIDGED POWER, 4 OHM 500w x 2 SIGNAL-TO-NOISE RATIO, 102 dB; THD, 0.01% DIMENSIONS: 11-7/8-InchW X 2-5/8 -InchH X 15-5/8-InchL Trimode operation; Bridgeable; Remote subwoofer level control; Line and speaker level inputs; Variable gain control Power and protection LEDs; Variable lowpass and High pass crossovers; 0-+18dB variable bass boost; MOSFET power supply