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PA151
Two-Way Speaker System
Architects' and Engineers' Specifications
The two-way loudspeaker system shall be self-contained
and consist of the following components: (1) a 15-inch, low-
frequency driver; (2) a high-frequency section consisting of a
constant-directivity horn and compression driver; (3) a two-
way crossover network; (4) a vented enclosure.
The low-frequency transducer shall be a cone type loud-
speaker having a cone diameter of at least 15 inches
(380mm). It shall have a voice coil of at least 3 inches
(76mm) in diameter. It shall present a nominal load imped-
ance of 8Ω. Sensitivity shall be at least 99dB when measured
at 1m with an input of 1 Watt and have a power rating of at
least 250 Watts (AES), 1000 Watts peak.
The high-frequency section shall have a compression
driver with a diaphragm of at least 1.75 inches (44mm) in
diameter. It shall present a constant-impedance load of 8Ω.
It shall be connected to a constant-directivity horn having a
throat diameter of at least 1 inch (25mm) and a nominal cov-
erage pattern of 90° horizontal by 70° vertical. Sensitivity
shall be at least 107dB when measured at 1m with an input
of 1 Watt and have a power rating of at least 35 Watts (AES),
140 Watts peak.
The system shall be crossed over by an internal, high-
level, passive network having a response of 12dB/octave.
The nominal crossover frequency shall be 1.7kHz. The low-
pass section of the network shall have minimum inductance
in series with the low-frequency driver. The high-pass section
of the network shall be equalized to optimize the perform-
ance of the constant-directivity horn. A dynamic high-fre-
quency protection circuit based on a low-value, low-mass fila-
ment resistor shall limit the current available to the compres-
sion driver. A connection option shall be provided to discon-
nect the crossover network, but not the high-frequency pro-
tection circuit, from the drivers to allow bi-amp operation.
Connections to the loudspeaker shall be Speakon
connectors.
The enclosure shall be a vented design with an internal
volume of at least 2.57 cu. ft. and a vent tuning of 50Hz. It
shall be constructed using 0.75 inch (19mm), void-free birch
plywood and finished with black, scratch-resistant paint. It
shall be trapezoidal shaped with 15° angled sides. A full
size, detachable, perforated steel grille, finished in black
scratch-resistant paint shall be provided. At least 10 rein-
forced threaded metal sockets (M10) for attaching mounting
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16220 Wood-Red Rd. NE, Woodinville, WA 98072 USA
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UK
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GERMANY
+49.2572.96042.0, fax +49.2572.96042.10, industrial@mackie.de
(continued Architects' & Engineers' Specs)
hardware, three eye bolts and two hand-carry locations shall
also be provided. The overall dimensions of the enclosure
shall not exceed 27.44 x 17.9 x 16.93 inches (697mm x
455mm x 430mm).
The performance of the two-way loudspeaker system shall
be as follows: long-term power handling, at least 300 Watts
RMS; peak power handling, at least 1200 Watts; frequency
response, 80Hz–18kHz at –3dB; maximum SPL, 130dB (ane-
choic–1m); sensitivity, 97dB SPL (1W/1m anechoic); –6dB
coverage, measured average 2kHz–16kHz, 90° horizontal by
70° vertical. The two-way loudspeaker system shall be a
model PA151 manufactured by Mackie Industrial.
®
NL4
Electronic files for this product available at:
www.mackieindustrial.com
This Specification Sheet
Mackie Designs continually engages in research related to product improvement. New material, produc-
tion methods, and design refinements are introduced into existing products without notice as a routine
expression of that philosophy. For this reason, any current Mackie Industrial product may differ in some
respect from its published description, but will always equal or exceed the original design specifications
unless otherwise stated. ©1999-2001 Mackie Designs Inc. All rights Reserved.
registered trademarks of Mackie Designs Inc. Mackie Industrial is a trademark of Mackie Designs Inc.
PA151.PDF
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are
part no. 910-152-10 Rev.B
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