Bogen C100 Classic Series 100-Watt Public Address Amplifier 4 inputs: 1 MIC (Lo-Z), 1 AUX (Hi-Z), 1 TEL, plus 1 selectable MIC or AUX Telephone input available for telephone paging applications Transformer isolated output taps at 4/8/16 ohms and 25/70V Thermal protection and electronic shutdown UL and CSA Listed