The SAH5, SAH15, and SAH30 powered horn loudspeakers employ digital switching amplifier technology resulting in low DC current draw and low heat dissipation.This means fewer power supplies, longer cable runs, and the capacity to work at higher ambient temperatures when compared to conventional analog selfamplified horn speakers. The horn loudspeakers can be positioned in any orientation (rotate, tilt, or swivel).The shape of the horn flare provides a controlled dispersion of sound for better intelligibility. They can be used in any environment, indoors or outdoors, without affecting sound quality. 5- model with built-in amplifiers All models operate from 24V DC power source Digital switching amplifier technology provides low DC current draw and heat dissipation compared to conventional analog amplifiers Low heat dissipation allows units to operate with continuous background music and in higher ambient temperatures than conventional analog self-amplified horn speakers Excellent extended frequency response from 1.6" diameter voice coil and 90mm, 12-ounce magnet structure (SAH5 and SAH15) or 100mm, 16-ounce magnet structure (SAH30) Predictable dispersion pattern over the full frequency range ensures excellent intelligibility and ease of layout 3 ways to position speaker (rotate, tilt, and swivel) Weatherproof, UV-protected plastic housing Simple and secure cast aluminum swivel mount Screw terminal strip for easy wire connections Indexed volume control knob Easily removable access cover Slot in the base allows strapping to be used as a means of mounting the horn to electrical boxes (mounting strap included) Mountable to an I-beam flange using Bogen's BC1 beam clamp (not included) Two-Year Warranty