Brand New Deura MA-4000 4,000 Watt 2 channel 2U Rack DJ Professional Power Amplifier with Built-in Fan and a Hot New DesignFeatures:8 Ohms Stereo Output Power: 440 Watts4 Ohms Stereo Output Power: 780 Watts2 Ohms Stereo Output Power: 1000 WattsPeak Power: 4000 WattsFrequency Response: 20Hz ~ 20KHzTHD + N (20Hz ~ 20KHz90dBCross Talk >65dBInput Sensitivity {8}: 0.775VInput Impedance: 20K balance / 10K UnbalanceCooling FanTwo {2} Variables Speed fans, Front to Rear FlowInput Connectors: Balance XLR, ¼" {6.35mm}Output Connectors: Out Puts: Speakon, banana binding postControls: Front power on/off, CH A & CH B Volume Control Level Indicators: BLUE LED Level Indicator and Clip IndicatorAmplifier Protection: Short Circuit, Thermal Limiter, DC faultGross Weight / Net Weight: 17.5 Lbs / 15.7 LbsUnit Size: 19"W x 3.5"H x 10"D {Inches}Box Size: 20.25"W x 7.25"H x 14.50"D { Inches}Power Supply: 115V/230V Switchable, 50-60Hz