Double re-entrant horn construction optimizes loudspeaker output to penetrate ambient sound levels. This 15-watt model incorporates a compression driver with ceramic magnet and includes a combination 25/70.7-volt line transformer with multi-position knob switch for selecting power taps. Unit is also equipped with wiring for an 8-ohm connection to facilitate installation when a transformer is not required. GA-15T features a round, high-impact plastic horn and will withstand outdoor installation in high-humidity environments. Adjustable surface mounting bracket provides multiple (vertical & horizontal) positioning. Each assembly is supplied with 21-gauge 18" color coded wire leads for matching polarity and loudspeaker connection. Entire assembly is gray with silver colored hardware.