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Architect’s and Engineer’s Specifications
The active subwoofer loudspeaker system shall in-
corporate one 15-inch low-frequency (LF)
transducer mounted within a vented enclosure and
tuned for optimum low-frequency response. System
frequency response shall vary no more than ± 3 dB
from 47 Hz to 120 Hz measured on axis. The loud-
speaker shall incorporate a low-frequency amplifier
system capable of delivering 500 watts RMS over a
frequency range of 30Hz to 150Hz. The system shall
provide 125 dB of continuous output and 128 dB of
peak output. The amplifier system shall be mounted
on an aluminum heat sink, which shall be mounted
on the rear of the enclosure, and shall be convection
cooled.
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 two input and two loop-through XLR
connectors, two high-pass output XLR connectors, a
volume level control, a phase switch, 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 connectors.
The power switch and IEC AC connector shall be lo-
cated on the power panel.
Thermal protection shall be provided by a heat sink-
mounted thermal sensor, which monitors the heat
sink temperature and triggers the thermal protection
circuit should the temperature exceed 140º F (60º C).
The Thermal LED shall light and the input signal shall
be muted until the heat sink cools to a safe operating
temperature, 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 amplifier output and re-
duces the input level to the amplifier should the
amplifier output begin to clip.
The enclosure shall have a rectangular shape and
shall incorporate two side handles, one on each side,
and a top-mounted pole receptacle. The enclosure
shall be constructed of multi-ply wood.
The active subwoofer loudspeaker system shall be
the Mackie Designs SWA1501.
SWA1501 SPECIFICATIONS
System Specifications
Frequency Range (–10 dB):
36 Hz–120 Hz
Frequency Response (–3 dB):
47 Hz–120 Hz
Maximum SPL @ 1m: 125 dB
Peak Output @ 1m: 128 dB
Crossover Frequency: 120 Hz (12 dB/octave)
Input Type: Balanced differential
Input Impedance: 50k ohms
Input Protection: Level protected
Thermal Protection: Input stage muting,
auto-reset
Transducer Specifications
Low-Frequency Transducer
Diameter: 15˝ (380 mm)
Voice Coil Diameter: 3˝ (75 mm)
Power Amplifier
Low-Frequency Power Amplifier
Rated Power
*:
500 watts RMS
Rated THD: < 0.03%
Cooling: Passive
Line Input Power
US: 120 VAC, 60Hz
Recommended Amperage Service: 8 A
Europe: 230 VAC, 50Hz
Recommended Amperage Service: 4 A
Physical Properties
Height: 23.5˝ (597 mm)
Width: 17.2˝ (436 mm)
Depth: 23.7˝ (603 mm)
Weight: 88 lbs. (40 kg)
Enclosure: 15 mm thick multi-layered baltic
birch wood
Enclosure Geometry:
Rectangular
Mounting Methods:
Floor mount only
WARNING: The cabinet has no rigging points
and is not suitable for rigging. NEVER attempt
to suspend the SWA1501 by its handles.
* Rated power into loudspeaker’s rated impedance.
Disclaimer
Since we are always striving to make our
products 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
trademarks 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.
Printed in the U.S.A.