Architect's & Engineer's Specifications

The coaxial stage monitor loudspeaker shall consist of a 12 inch (305 mm) low frequency transducer with 3 inch (76 mm) voice coil and one 1.4 inch (36 mm) Neodymium compression driver with 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 97 dB-SPL. Usable frequency response shall extend from 55 Hz to 18 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 400 Watts continuous power and 1,600 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 stage monitor can either be operated in full-range or bi-amp mode. The coaxial Neodymium compression driver shall be capable of even coverage at a nominal 90° horizontal through 90° vertical distributed pattern. The enclosure shall be constructed from prime-grade 15 mm plywood. The grille shall be of heavy-duty steel backed with acoustically transparent foam. The external wiring shall be via three 4-pin twist-lock connectors. The loudspeaker shall be 11.97 inches (304 mm) high by 21.97 inches (558 mm) wide by 20.24 inches (514 mm) deep weighing 43.3 pounds (19.6 kg). The finish shall be a paintable lightly textured black or white. The coaxial stage monitor loudspeaker shall be the Crest Audio CPL 12CM+ or approved equivalent.