12
Architects and Engineers’ Specifications
The rear mounted amplifier assembly
shall comprise separate signal and AC power
panels separated by a large aluminum heat
sink. The signal input panel shall contain
an input and loop-through XLR, a volume
level control, and four status LEDs for Power
ON, Signal Present, Limit, and Thermal
functions. The system shall accept a stan-
dard line-level signal via the XLR input
connector. The power switch and IEC AC
connector shall be located on the power panel.
Thermal protection shall be provided by
a thermal sensor mounted on the heat sink,
which monitors the heat sink temperature
and triggers the thermal protection circuit
should the temperature exceed 158
°
F
(70
°
C). The Thermal LED shall light and
the input signal shall be muted until the
heat sink cools to a safe operating level, at
which point the thermal protection circuit
auto-resets and normal operation resumes.
Overload protection shall be provided by
a limiter circuit, which monitors the low-
frequency amplifier output and reduces the
input level to the amplifier should the am-
plifier output begin to clip.
The loudspeaker enclosure shall have a
trapezoidal shape and shall incorporate two
side handles, one on each side, and a top
and bottom relocation handle. The enclo-
sure shall be constructed of a combination
multi-ply wood and high-pressure injected
structural resin, with a black PVC vinyl fin-
ish. The front of the loudspeaker shall be
covered with a powder coated, weather-
resistant perforated steel grille.
The active three-way full-range loud-
speaker system shall be a Mackie Designs
SA1232.
The active three-way, full-range loud-
speaker system shall incorporate two
12-inch low-frequency (LF) transducers, a
6-inch horn loaded mid-frequency (MF)
transducer, and a 1-inch exit, 1.75-inch
titanium dome compression driver high-
frequency (HF) transducer. The LF drivers
shall be mounted in a vented enclosure
tuned for optimum low-frequency response.
The MF and HF transducers shall be loaded
on a symmetrical constant-directivity horn
assembly designed for wide dispersion.
The system shall have a nominal coverage
pattern of 90
°
(horizontal) x 40
°
(vertical).
System frequency response shall vary no
more than
±
3 dB from 45 Hz to 18 kHz
measured on axis. The loudspeaker shall in-
corporate a Class G low-frequency amplifier
capable of delivering 1100 watts rms over a
frequency range of 20 Hz–700 Hz. The system
shall incorporate two Class AB 100 watt
rms amplifiers specifically designed to
power the MF and HF drivers over the range
of 700 Hz–3000 Hz and 3000 Hz–20 kHz
respectively. The amplifiers shall be mounted
on an aluminum heat sink, which shall be
mounted on the rear of the speaker system,
and shall be convection cooled.
Dimensions
13.9 in
35.3 cm
19.1 in
48.5 cm
50.0 in
127 cm
18.1 in
46.0 cm
18.1 in
46.0 cm
19.1 in
48.5 cm
Disclaimer
Since we are always striving to make our prod-
ucts better by incorporating new and improved
materials, components, and manufacturing methods,
we reserve the right to change these specifications at
any time without notice.
“Mackie” and the “Running Man” figure are trade-
marks or registered trademarks of Mackie Designs Inc.
All other brand names mentioned are trade-
marks or registered trademarks of their respective
holders, and are hereby acknowledged.
©2003 Mackie Designs Inc. All Rights Reserved.
