Features Specifications:Sell Karaoke Amplifier  Functions:(1) When it is start-up, all setting will be at zero automatic, and the total volume will be auto adjusted. (2) With tone transposition function and karaoke line control system.(3) It can connect to the VOD computer system with all function remote control.(4) With Karaoke squelch circuit (5) Bran-new professional digital mixer.(6) With grading output jack, it is easy to show the mark of your singing.(7) With recording output jacks, you can record the music. (8) With prefect protect function for speaker. (9) It can connect to the main track and the incidental track.(10) With subwoofer output port, it can connect to the subwoofer that is with amplifier. (11) Three microphone input jacks are both in front and back of the panel, it is easy for installing.Specifications:E-722:Output Power(1KHz,4ohm): 100W+100W Frequency Response: 20Hz-45KHz Signal to Noise Ratio: 75dB Separation: 48dB T.H.D.: &le 0.18% 1KHz Power Requirements: AC220V/50Hz Weight: 9.1Kg MIC input sensitivity: 10mV Dimensions(mm): (L x H x W) 430x130x330 E-822:Output Power(1KHz,4ohm): 150W+150W Frequency Response: 20Hz-46KHz Signal to Noise Ratio: 75dB Separation: 48dB T.H.D.: &le 0.18% 1KHz Power Requirements: AC220V/50Hz Weight: 9.2Kg MIC input sensitivity: 10mV Dimensions(mm): (L x H x W) 430x130x330 E-922:Output Power(1KHz,4ohm): 200W+200W Frequency Response: 20Hz-46KHz Signal to Noise Ratio: 75dB Separation: 48dB T.H.D.: &le 0.18% 1KHz Power Requirements: AC220V/50Hz Weight: 10Kg MIC input sensitivity: 10mV Dimensions(mm): (L x H x W) 430x130x330