SP-2570N Aiphone Flush Mount Ceiling Speaker The SP-2570N Aiphone is a ceiling speaker used for paging and background music. It is equipped with a 25/70V transformer with five wattage taps up to 4W. The speaker is mounted to a round steel baffle, finished with a white powdercoated epoxy. An optional ceiling support bridge (SSB-2) is available for installations in drop tile ceilings. Some features of SP-2570N