Architect's & Engineer's Specifications The loudspeaker shall consist of a 12 inch (305 mm) low frequency transducer with 3 inch (76 mm) voice coil and a 1 inch (25.4 mm) exit compression driver with a 1.4 inch (36 mm) voice coil and a frequency dividing network installed within the enclosure. Performance specifications of a typical production unit shall be: Measured sensitivity SPL at 1 m (3.3ft) with 2.83V input, shall be 96 dB-SPL. Usable frequency response shall extend from 49 Hz to 20 kHz (10 dB below rated sensitivity, in full space, with no external equalization). Nominal impedance shall be 8 Ohms. Rated power capacity shall be at least 350 Watts continuous power and 1,400 Watts peak power, defined as 6 dB above a test signal of filtered random noise. The system shall be protected against damage from occasional over-powering limiting the power to the network and transducers. The compression driver shall be capable of even coverage at a nominal 90° horizontal through 60° vertical distributed pattern. The horn shall be rotatable. The enclosure shall be constructed from prime-grade 15 mm plywood. The loudspeaker shall be equipped with a total of sixteen (16) suspension points. The grille shall be of heavy-duty steel backed with acoustically transparent foam. The external wiring shall be via either two 4-pin twist-lock or one 4-pin Euroblock connectors. The loudspeaker shall be 23.82 inches (605 mm) high by 14.49 inches (368 mm) wide by 15.35 inches (390 mm) deep weighing 45.5 pounds (20.7 kg). The finish shall be a paintable lightly textured black or white. The loudspeaker shall be the Crest Audio CPL 12+ or approved equivalent.