engineering drawingflying infofrequency

TXD-218 Architect's and Engineer's Specifications
The system shall be of the low frequency type consisting of two 18" (457mm) low frequency loudspeakers. 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 36Hz to 150Hz. Nominal impedance shall be 4 ohms. Power handling shall be 600 watts r.m.s., 1200 watts program. Sensitivity, measured with 1 watt input at 1 metre distance on axis, mean averaged over stated bandwidth, shall be 101dB. Maximum SPL (peak) measured with music program at stated amplifier input shall be 135dB. Dimensions: 1035mmH x 602mmW x 532mmD (40.7"H x 23.7"W x 20.9"D). Weight: 57kg (125.4lbs). The loudspeaker system shall be the Turbosound TXD-218. 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