PowerBass XMA-4250IR 1000 Watt 4ch Compact Amplifier The XMA amplifiers carry on the tradition of looking good and sounding great while taking up less space than any other amplifier we have ever offered – and smaller than most amps available from the majority of our competitors’ at the same output levels. High efficiency FRD (Full Range Digital) technology allows these amplifiers to operate at well over 85% efficiency. Limited space no longer means sacrificing great sound with the new PowerBass XMA Amplifiers. Features - 1,000 Watt High Efficiency Full-Range Class D Design 2-OHM Stable Four Channel Amplifier Ultra Low Current Draw Double Sided Copper Plated PCB PWM MOSFET Power Supply Digital Sound Optimization Circuitry High Damping Control Circuit Variable Subsonic Filter High Current Voltage Ripple Rejection Circuitry Balanced RCA Inputs Auto Turn On/Off Remote Soft Delay Turn On/Off Circuit 40 Click Variable Detente High/Low Pass Electronic Crossover Switchable 0/12/18 dB Bass Boost @ 45 Hz Variable Gain Control Protection Circuit: Impedance Over-load, Speaker Short, Circuit, Thermal Overheating, and DC Output Specifications - Inputs: 4 RCA (speaker level compatible) Subwoofer Frequency Range: 10 Hz - 250 Hz Switchable Subwoofer EQ: 0 / +12 / +18dB @ 45 Hz 4-ohm Mono Power: 500 watts x 2 4-ohm Power: 125 watts x 4 2-ohm Power: 250 watts x 4 Subwoofer EQ Frequency: 45 Hz Low-Pass Crossover Freq: 25 Hz - 250 Hz High-Pass Crossover Freq: 50 Hz - 350 Hz Peak Power: 2000 watts Crossover Slope: 12 dB Dimensions (in Inches): 11.2" x 7.1" x 2.0" Input Sensitivity: 0.25 V - 10.0 V S/N Ratio: >90 dB Total Harmonic Distortion: 0.04% at Rated Power Output Power (14.4 V) @ 4 ohm: 125 watts x 4 Output Power (14