POWER ACOUSTIK REP1-6000D 6000 Watt MOSFET Mono 1 Ohm Amp with High/Low Input and Bass Knob Class D MOSFET Power Amplifier is 1-Ohm Stable. Remote Gain Control included: Allows amplifier level adjustment from a remote dash location in the vehicle. MOSFET PWM Power Supply: Metal Oxide Semi-conductor Field Effect Transistors with Pulse Width Modulated circuitry power supply. MOSFET transistors increase durability and longevity over bi-polar counterparts... Variable Crossovers filter out frequencies that could cause damage to speakers, or that subwoofers can't play via 12dB/octave slope high pass, low pass, & subsonic crossovers. 6,000 Watt 1 Channel Amplifier, Max Power 6000, RMS Power @ 4, 14.4V 1 X 1900, RMS Power @ 2, 14.4V 1 X 2500, RMS Power @ 1, 14.4V 1 X 3300 2ga Power/Ground & 8ga Speaker Terminals Three-Way Protection Circuitry