15-Watt Phone Paging Amplifier is the ideal choice within the telephone paging industry. This 15-watt paging amplifier provides signal-activated, automatic muting of background music during a telephone page, and gradual return of music following a page. Features: 2 inputs:1 TEL, 1 AUX (Hi-Z), Sensitivity:-20 dBm, Tel; 85 mV, Aux, 600-ohm balanced TEL inputer for direct connection to page ports and adapters, TEL input has Automatic Level Control (ALC) for constant page announcement level, Music input - mutable by activity on TEL input, Separate volume controls for mic, paging, background music, and night ringer, Built-in night ringer can be activated from external contact closure. 25V, 70V and 8-ohm constant voltage outputs, balanced and unbalanced. Wall-mount design provides minimum protrusion from backboard.