Fire alarm speaker circuits for dual-purpose spaces

A Notification Appliance Circuit (NAC) selecting device in a fire alarm system, comprising:

• at least two input ports electrically coupled with at least two NACs, wherein each of the at least two NACs includes respective groupings of one or more NAC appliances and wherein each of the two or more NACs is configured to transmit a corresponding audio signal received from a Fire Alarm Control Panel (FACP);
• a selection input port electrically coupled with the FACP for receiving a selection signal, wherein the selection signal identifies one or more NAC appliances from the at least two NACs that should be moved from a first grouping corresponding to one of the at least two NACs to a second grouping corresponding to a different one of the at least two NACs;
• and
• an output port electrically coupled with the at least two NACs configured to transmit the corresponding audio signal based on the selection signal received from the FACP.