FMM-1 is a standard-sized module (typically mounts to a 4" [10.16 cm] square box) that supervises either a Class A (Style D) or Class B (Style B) circuit of dry-contact input devices.
X-DA1500 high efficiency power amplifier provides audio signal amplification for the X-618 Digital Public Address and Voice Alarm System. X-DA1500 is reliable, efficient and light in weight.