20 and 40-watt models. Up to 40 half-watt speakers per 20watt module. Up to 80 half-waft speakers per 40watt module. Speaker circuits fully supervised. Short circuit and overload protected.
Speaker circuits are power limited.
Battery backup from fire alarm control. Battery saver circuit reduces current draw during AC failure conditions. Penetrating slow-whoop alarm signal. Microphone can be used with or without alarm condition. Digital message repeater uses voice band filtering to assure announcements will be heard even in high noise areas.