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.