We are manufacturer, professional amplifier 1, 60W*4 100W*4 150W*4 200W*4 2, 4 channel outputs 3, 70/100V, ... 16Ω +_3dB *430CA-2004200W*4 We are manufacturer, professional amplifier1, 60W*4 100W*4 150W*4 200W*42, ... output with 70V,100V outputs. LED level indicator.2. 6 channel outputs, individual volume control for each channel3. Chime ... 5. Short-circuit. over-load protection. 4 channel power Amplifier