The system shall be of the two-way passive trapezoidal type consisting of one 12" (305mm) low frequency loudspeaker and one 1" (25mm) high frequency driver on a 90 degree by 60 degree constant directivity horn. Performance specifications of a typical production unit shall meet or exceed the following: frequency response, measured with swept sine wave input, shall be flat within 60Hz to 20kHz ±4dB. Nominal dispersion, at 6dB points, shall average 90 degrees horizontal by 60 degrees vertical. Nominal impedance shall be 8 ohms. Power handling shall be 290 watts r.m.s., 580 watts program, 725 watts peak. Sensitivity, measured with 1 watt input at 1 metre distance on axis, mean averaged over stated bandwidth, shall be 97dB. Maximum SPL (peak) measured with music program at stated amplifier input shall be 131dB. Dimensions: 700mmH x 370mmW x 389D (27.6"H x 14.6"W x 15.3"D). The loudspeaker system shall be the Turbosound TCS-59. 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.
