We are manufacturer, professional amplifier 1, 60W*4 100W*4 150W*4 200W*4 2, 4 channel outputs 3, 70/100V, 4-16ohm ModelRated powerOutput modelInput sensitivityS/n ... , professional amplifier1, 60W*4 100W*4 150W*4 200W*42, 4channel outputs3, 70/100V. 4-16ohm1. 3MIC inputs, 3 Aux inputs, 1 Aux output with ... volume control for each input.5. Short-circuit. over-load protection. 4 channel power Amplifier