DescriptionThe Ceiling Speaker Back Box (Model SE-1) is a component of the Siemens Series of Fire Alarm Signaling Devices, serving as a viable mounting option for the 8-inch (20.3 cm.) ceiling speaker, Model S-HQ.
DescriptionThe Ceiling Speaker Back Box (Model SE-1) is a component of the Siemens Series of Fire Alarm Signaling Devices, serving as a viable mounting option for the 8-inch (20.3 cm.) ceiling speaker, Model S-HQ.
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