The Bogen FMH15T is a flange-mounted, high intelligibility, reentrant type loudspeaker. Its sturdy, weatherproof, vandal-resistant, all-metal construction is ideal for indoor and outdoor use in industrial plants, warehouses, schools, construction sites, transportation terminals, and recreational areas. The Model FMH15T has a built-in, variable impedance selector switch for matching the speaker power requirements to a 70V or 25V constant-voltage line. Screw terminals make installation fast and easy. Accessory flush- or surface-mount enclosures, heavyduty cast aluminum grille and adapter ring are available to complete the installation of this unique speaker. Field maintenance is accomplished using a self-aligning, field replaceable diaphragm. ? Excellent voice intelligibility and efficiency ? Flange-mounted, reentrant type loudspeaker ? Weatherproof design for indoor or outdoor use ? Vandal-resistant, for applications in hostile environments ? All-metal construction with black enamel finish ? 15 watts max. @ 70V or 25V ? Weather-sealed variable-tap impedance selector switch ? Power handling is 0.9, 1.8, 3.6, 7.5, or 15 watts for 70V systems and 0.125, 0.25, 0.5, 0.9, 1.8, 7.0, or 15 watts for 25V systems ? Screw terminals for fast and easy installation ? Self-aligning, field replaceable diaphragm for easy field maintenance ? Select flush or surface mount enclosure for installation (each sold separately) ? Heavy-duty cast aluminum grille and adapter ring for installation (each sold separately).