The PC-580S Square Ceiling Mount Speaker is of all heavy-duty metallic construction with an 8-inch speaker and 5W transformer to be used in 25V/70V audio distribution systems. It delivers highly intelligible voice announcements and clear music sounds in General Paging and Background Music Distribution applications. The optional back boxes are available for flush or surface mount installations on the wall. The input impedance can be easily changed by transformer tap position and its dual push-in teminal helps quick daisy-chain wiring.