Bass Inferno BI4200 2000 Watt 4 Channel Amplifier Bridgeable Class AB Circuitry Audiophile Grade Components High Efficiency MOSFET Outputs On-Board High/Low X-Over Rated Power @ 14.4V= 4 X 500W @ 2 Ohm Thd &lt;0.05% 2 X 1000W @ 4 Ohm Thd &lt;0.05% High-Efficiency Mosfet Outputs Fully Variable High/Low Crossover Built In (12 Db) Bridgeable -2 Ohm Mono Capability