GTD Audio 2 Channel 3800 Watts 2U Stereo Professional Power Amplifier AMP 500 Watts (2 x 250 ) @ 8 Ohms RMS, 2 x 450 Watts @ 4 Ohms RMS, 3800 Watts Peak XLR, " (6.5mm Jack) Balanced Inputs, Speakon and Banana binding post Outputs Front-to-Rear Airflow and Dual Cooling Fans Frequency response 45Hz  15kHz Dimensions (WxDxH): 17 x 9" x 3, Weight: 19 lbs