engineering drawing polar horizontal polar vertical frequency

TQ-315DP Architect's and Engineer's Specifications
The system shall be of the self-powered, two-way trapezoidal type consisting of one 15" (381mm) low frequency loudspeaker and one 1.4" (25mm) high frequency driver on a Converging Elliptical Waveguide™. The integral power amplifier module shall contain two channels of Class D amplification, output limiting, and equalisation incorporating frequency responses optimised for speech and music applications. 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 50Hz to 20kHz. Nominal dispersion, at -6dB points, shall average 80 degrees horizontal x 50 degrees vertical. Maximum SPL (peak) measured with music program at stated amplifier input shall be 136dB. Dimensions: 691mmH x 443mmW x 420mmD (27.2"H x 17.4"W x 16.5"D). Weight: 32kg (70.4lbs). The loudspeaker system shall be the Turbosound TQ-315DP. 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.