Boss CX1800 Chaos Exxtreme MOSFET 5-Channel Power Amplifer Amplifier Class: Class A/B Technology: MOSFET Number of Output Channels: 5 Total Power: 1800 Watts Max Bridged Power @ 4 Ohms: 600 Watts x 2 Max Power @ 2 Ohms: 300 Watts x 4 RMS Power @ 4 Ohms: 120 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 Single 5-channel bridgeable power amplifier Remote subwoofer level control Sensitivity: 105 dB Power output: 600w x 2 + 600W x 1 RMS, 120w x 4 + 200W x 1 Max, 300w x 4 + 600W x 1 Bridged MOSFET power supply