Frequency response 10Hz 50kHz at 1.5 dB. Total Harmonic Distortion: Less than 0.1%. Input sensitivity & Impedance: 0.77v. Signal to Noise (20 Hz - 20 kHz) > 90dB.Dimensions (WxDxH): 20.1 x 13.4 x 1.2. The item "GTD Audio 2 Channel 4500 Watts Professional Power Amplifier Amp Stereo J4500" is in sale since Saturday, November 10, 2018. This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Amplifiers". The seller is "microphone-giant" and is located in Catonsville, Maryland. This item can be shipped worldwide.