Architects and Engineers’ Specifications
The active, three-way, full-range loudspeaker system shall incorporate one
15-inch low-frequency (LF) transducer, one horn-loaded 6-inch mid-frequency (MF) transducer, and a 1-inch exit compression driver high-frequency (HF) transducer. The LF driver shall be mounted in a vented combination multi-ply wood and high pressure injected wood enclosure tuned for optimum low-frequency response. The MF and HF transducers shall be loaded on a one piece, combination HF/MF horn assembly with optimized wavefront characteristics. The system shall have a nominal coverage pattern of 90º (horizon- tal) x 40º (vertical). System frequency response shall vary no more than ± 3 dB from 70Hz to 15kHz measured on axis. The loudspeaker shall incorporate a low- frequency amplifier capable of delivering 300 watts rms over a frequency range of
20Hz-800Hz. The system shall incorporate a 100 watt rms amplifier specifically designed to power the MF driver over the range of 700Hz-3kHz and a 100 watt rms amplifier specifically designed to power the high- frequency driver over the range of 3kHz-20kHz. The amplifiers shall be mounted on an aluminum heatsink mounted within the speaker system. The loudspeaker enclosure shall have a trapezoidal shape and shall incorporate two side handles and a top and bottom relocation handle. The system will include an XLR input connector and an XLR loop-through signal connector. The front of the loudspeaker shall be covered with a powder coated, weather resistant perforated steel grill.
The active three-way full-range loudspeaker system shall be the Mackie Designs SR1530.
Frequency Response
SR1530 Frequency Response On-Axis110
100
90
80
Frequency (Hz)
