9
Architects and Engineers’ Specifications
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 trapezoi-
dal shape and shall incorporate two side
handles and a top and bottom relocation
handle. The system will include an XLR in-
put connector and an XLR loop-through
signal connector. The front of the loud-
speaker 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.
The active, three-way, full-range loud-
speaker 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 pres-
sure 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 as-
sembly 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
Frequency Response
SR1530 Frequency Response On-Axis
Frequency (Hz)
SPL, 1W/1m (dB)
20
80
90
100
110
100
1000
10000
20000