THL-2 Architects' and Engineers' Specifications
The system shall be of the switchable bi-amp / passive three-way full range trapezoidal type consisting of one 15" (381mm) low frequency loudspeaker, one 6.5" mid frequency cone loudspeaker loaded with a TurboMid device, and one 1" (25mm) high frequency compression driver on a proprietary horn flare. 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 ±4dB from 70Hz to 20kHz . Nominal dispersion, at -6dB points, shall average 90 degrees horizontal x 40 degrees vertical. Nominal impedance shall be LF: 8 ohms, MF/HF: 16 ohms. Power handling shall be LF: 300 watts r.m.s., 600 watts program, 750 watts peak; MF/HF: 150 watts r.m.s., 300 watts program, 375 watts peak. Sensitivity, measured with 1 watt input at 1 metre distance on axis, mean averaged over stated bandwidth, shall be 100dB. Maximum SPL (peak) measured with music program at stated amplifier input shall be 133dB. Dimensions: 875mmH x 512mmW x 413mmD (33.6"H x 20.2"W x 16.3"D). The loudspeaker system shall be the Turbosound THL-2. 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.
