TQ-445 Architects' and Engineers' Specifications
The loudspeaker shall be of the three way, bi-amplified type, consisting of one reflex loaded 12" (305mm) low frequency loudspeaker in a vented trapezoidal enclosure, one 6.5" (165mm) mid frequency loudspeaker loaded with a TurboMid device and a 1" (25mm) high frequency compression driver mounted co-axially to the low frequency loudspeaker. The loudspeaker shall be designed for use with a dedicated digital loudspeaker management system providing crossover, output limiting and delay functions. Performance specifications of a typical production unit shall be: Frequency response, measured with swept sine wave input, shall be flat within ±4dB from 75Hz to 20kHz. Nominal dispersion, at -6dB points, shall average 60 degrees horizontal by 40 degrees vertical. Nominal impedance shall be LF: 8 ohms; MF/HF: 12 ohms. Power handling shall be LF: 300 watts r.m.s., 600 watts program; MF/HF: 150 watts r.m.s., 300 watts program. Sensitivity, measured with 1 watt input at 1 metre distance on axis, mean averaged over stated bandwidth, shall be LF: 103dB, MF/HF: 104dB. Maximum SPL (peak) measured with music program at stated amplifier power shall be 137dB. Dimensions: 588mmH x 409mmW x 363mmD (23.1" x 16.1" x 14.3"). Weight: 30kgs (66lbs). The loudspeaker shall be the Turbosound TQ-445. No other loudspeaker shall be acceptable unless submitted data from an independent test laboratory verify that the above combined performance/size specifications are equalled or exceeded. A range of flying and lifting hardware shall be available.
