PM3180 amplifier incorporates three independent amplifier channels with a unique digital interface, providing the ideal solution for restaurant, lounge/bar hotel, factory or similar facilities where multiple program and paging inputs need to be distributed to separate areas and automatically switched. The PM3180 provides up to 4 AUX inputs and 2 MIC inputs that can be individually assigned to each amplifier channel (one of the mic inputs can be programmed for telephone paging applications). Each input on a particular channel can also be assigned a priority level; the amp channel will then automatically switch inputs based on input activity. Microphones can be assigned to the highest priority levels: 1 or 2; and aux sources to levels 3, 4, 5, or 6. For example, a paging microphone can be assigned priority level 1, a jukebox to level 3, and a radio to level 4. In this configuration, the radio will play until the jukebox becomes active; both inputs are overridden when the page microphone is activated. The three integrated amplifier channels are rated at 100, 60, and 20 watts. All amplifiers have separate 4- and 8-ohm outputs as well as 25 and 70 volt taps. Audio processing inserts are also included for each amp channel to facilitate the connection of external signal processing equipment. Adjustable input trim controls adjust for differing audio source input levels.