... Evacuation System Class D amplifier for voice alarm system, 120W to 500W per channel. DescriptionsA series classD power amplifiers have three ... Balanced line input by phoenix connector and 100V line speaker output by phoenix connector.Built-in two fans for ... 50A, 19.5A, 52A, 72A, 100A Audio Input (balance) Distortion <1% (RMS) , 1KHzFrequency 40Hz~20KHz Audio Output (balance) Distortion <1% (RMS) ...