FC104T72FRK Fire Rated 4" Standard Loudspeakers (UL Listed) 25/70.7V-4W xfmr made by Atlas Sound.
This model is UL classified for fire-resistance in the United States and Canada. This unit has passed a fire-rating up to three hours (rating varies by ceiling construction), and has been tested in accordance with the UL standard Fire Test of Building Construction and Materials, ANSI/UL263 (ASTM E119, NFPA 251). It is pre-manufactured and assembles quickly on-site with no special tools or skills. The assembly includes an enclosure-fiber kit, UL listed speaker/transformer assembly, and choice of UL Listed baffle. Each enclosure-fiber kit includes pre-cut fiber panels, metal enclosure, rail set, and hardware. Atlas-Sound FR Series offers a wide variety of cost, performance, and aesthetic options.