Boss CX250 Chaos Exxtreme MOSFET Bridgeable 2-Channel Power Amplifier Amplifier Class: Class A/B Technology: MOSFET Number of Output Channels: 2 Total Power: 400 Watts Max Bridged Power @ 4 Ohms: 400 Watts x 1 Max Power @ 2 Ohms: 200 Watts x 2 RMS Power @ 4 Ohms: 75 Watts x 2 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: 2.46"" x 7.85"" x 11.81"" Bridgeable Soft Turn-On Circuit Thermal Overload & Speaker's Short Protection Remote Subwoofer Level Control Tri-Mode Operation Power & Protection LEDs Input Sensitivity Selector Single 2-channel bridgeable power amplifier Sensitivity: 102 dB Power output: 75w x 2 RMS, 200w x 2 Max, 400w x 1 Bridged Line and speaker level inputs MOSFET power supply