Architecture and Engineering Specifications
The loudspeaker shall be of the passive subwoofer type, consisting of one 18" (460 mm) LF driver. 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 ±3 dB from 40 Hz to 120 Hz and within -10 dB from 32 Hz to 200 Hz. Nominal dispersion shall be “half space.” Maximum amplifier output power shall be 4,000 Watts peak, Sensitivity, measured on axis, mean averaged over the stated bandwidth, shall be LF: 96.5 dB, 1 Watt @ 1 metre. Peak level at 1 m under half space conditions using IEC 268-5 pink noise with crest factor 4, with dedicated pre-set, shall be 138 dB. Dimensions: 525 mm high x 785 mm wide x 560 mm deep (20.66" x 30.9" x 22.04”). Net weight: 40.7Kg (89.73 lbs). The loudspeaker system shall be the TURBOSOUND TQ18B. No other loudspeaker shall be acceptable unless submitted data from an independent test laboratory verifies that the above combined performance / size specifications are equalled or exceeded.