PowerBass XMA-5900IR 1600 Watt 5ch 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 - 1,600 Watt High Efficiency Full-Range Class D Design 2-OHM Stable Five 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 Variable Gain Control Wired Secondary Remote Gain Control Included Specifications - Selectable Subwoofer EQ: 0-18dB Gain @ 45Hz Inputs: 3 Pairs RCA (speaker level compatible) Subwoofer Frequency Range: 10 Hz - 250 Hz 4-ohm Mono Power: 400 watts x 2 + 500 watts x 1 (4-ohm) 4-ohm Power: 100 watts x 4 + 500 watts x 1 2-ohm Power: 200 watts x 4 + 800 watts x 1 Subwoofer EQ Frequency: 45 Hz Variable Subwoofer EQ: 0 - 18 dB Low-Pass Crossover Freq: 25 Hz - 250 Hz High-Pass Crossover Freq: 50 Hz - 350 Hz Peak Power: 3200 watts Crossover Slope: 12 dB Dimensions (in Inches): 14.7" 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: 100 watts x 4 + 500 watts x 1 Output Power (14