In this way, every zone has a separate amplifier (or channel) whereby the power or volume for each zone can be different. (The relays of the ARU will be switched to background music) In case of an announcement, the ARU will switch to the signal coming from the paging microphone (for the channels selected by the buttons on the APM microphone) and the announcement will be heard in the selected zone. In normal operation, the music coming from the Line-Level audio source (CD-Player, Tuner, MP3 Player, … ) will be heard in all the zones. On the output of the ARU Unit, a four channel 100V amplifier (or four independent amplifiers) is connected for amplification of the audio signal for every zone. Besides the APM Paging Microphone, a Line-Level audio source is connected as background music source.
This application diagram shows a simple and basic setup with an APM Paging Microphone in an analogue paging setup, combined with an ARU Intelligent Relay Unit.
