MTI Digital Amplifier

The MTI 91643 Digital Amplifier is a cost effective solution for intercom applications. The 91643 communicates with the intercom master (i.e. touch screen computer or handheld device) over a standard Ethernet connection. The amplifier is designed to connect to a 25V intercom system. The digital amplifier also supports up to a 60W paging amplifier interface. In the standard MTI Intercom system, the 91643 connects to the MTI Intercom termination boards (81129/81229) via the speaker bus. See Figure 2 for the typical hookup for the 91643 digital amplifier.