Architect's & Engineer's Specifications The loudspeaker shall be equipped with a 5 inch (127 mm) woofer, combined with a 0.75 inch (19 mm) silk dome tweeter. The nominal radiation geometry shall be 80 degrees in the horizontal plane, and 50 degrees in the vertical plane. The unit shall accept low impedance signals as well as 70/100V constant voltage lines via the internal transformer with taps from 5W to 15W at 100V, and 2.5W to 7.5W at 70V. Performance specifications of a typical production unit, measured sensitivity SPL at 1 m (3.3ft) with 2.83V input, shall be 88 dB-SPL. Usable frequency response shall extend from 75 Hz to 20 kHz (10 dB below rated sensitivity, with no external equalization). Nominal impedance shall be 8 Ohms. Rated power capacity shall be at least 50 Watts continuous power, defined as 3 dB above a test signal of filtered random noise. The weather resitant enclosure shall be constructed of durable molded white polypropylene plastic with textured surface and a white perforated full-coverage grille. A steel wall mounting bracket shall be included. The external wiring shall be via 2-pin srew terminal connectors. The outside dimensions shall be 10.5 inches (265 mm) high by 7.5 inches (190 mm) wide by 8 inches (205 mm) deep. The weight shall be 5 lbs (2.3 kg). The loudspeaker system shall be a Peavey model Impulse 5c White or approved equivalent.