Output 1 on the M1 System is global to all 8 Areas as far as Alarms, System Events, System Troubles, Spoken Voice messages, etc. It will be very difficult to try and select only certain speakers to be active in order to only speak certain messages. This process would require relays to switch in/out those speakers and numerous rules. The ELK M1 TWA Two-way Amplified Interface would allow you the option to “Mute” specific groups of speakers using Rules. This perhaps would be a cleaner/neater solution without the need of external relays.