engineering drawingfrequency

TA-890L Architect's and Engineer's Specifications
The system shall be of the low frequency type consisting of two 15" (381mm) low frequency loudspeakers loaded with TurboBass™devices. 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 45Hz to 250Hz. Nominal impedance shall be 8 ohms. Power handling shall be 1100 watts rms, 2200 watts program. Sensitivity, measured with 1 watt input at 1 meter distance on axis, mean averaged over stated bandwidth, shall be 101dB. Maximum SPL (peak) measured with music program at stated amplifier input shall be 138dB. Dimensions: 795mmH x 477mmW x 574mmD (31.3"H x 18.8"W x 22.6"D). Weight: 63kg (139lbs). The loudspeaker system shall be the Turbosound TA-890L. 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.