Architects’ And Engineers’ Specifications - Mackie SA1521 Specifications

SA1521
Architects' and Engineers' Specifications
The active two-way, full-range loudspeaker
system shall incorporate one 15-inch low-frequency
(LF) transducer and a 1-inch exit compression driver
high-frequency (HF) transducer. The LF driver shall
be mounted in a vented enclosure tuned for optimum
low-frequency response. The HF transducer shall be
loaded on a symmetrical constant-directivity horn.
The system shall have a nominal coverage pat-
tern of 75° (horizontal) x 65° (vertical). System
frequency response shall vary no more than ±3 dB
from 57Hz to 18kHz measured on axis. The loud-
speaker shall incorporate a Class G low-frequency
amplifier capable of delivering 400 watts RMS over
a frequency range of 20Hz-1300Hz. The system
shall incorporate a Class AB 100 watt RMS amplifier
specifically designed to power the HF driver over
the range of 1300Hz-20kHz. The amplifiers shall be
mounted on an aluminum heatsink, which shall be
mounted on the rear of the speaker system, and
shall be convection cooled.
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Active Speaker System
Thermal protection shall be provided by a ther-
mal sensor mounted on the heatsink, which mon-
itors the heatsink temperature and triggers the
thermal protection circuit should the temperature
exceed 140° F (60° C). The Thermal LED shall
light and the input signal shall be muted until the
heatsink 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 amplifier output begin to clip.
The loudspeaker enclosure shall have a trapezoi-
dal shape and shall incorporate two side handles
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 finish. The front of the
loudspeaker shall be covered with a powder coated,
weather-resistant perforated steel grille.
The active two-way full-range loudspeaker
system shall be a Mackie SA1521.
Electronic files for this product available at:
www.mackie.com
This Specification Sheet
Owner/Operator's Manual
LOUD Technologies Inc. continually engages in research related to product improvement. New material,
production methods, and design refinements are introduced into existing products without notice as a
routine expression of that philosophy. For this reason, any current LOUD Technologies product may differ
in some respect from its published description, but will always equal or exceed the original design speci-
fications unless otherwise stated. ©1999-2004 LOUD Technologies Inc. All rights reserved. "Mackie." and
the "Running Man" figure are registered trademarks of LOUD Technologies Inc.
SA1521_SS.PDF
SA1521_OM.PDF
Part No. 0000788 Rev. D 09/04
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