HD1531
3-Way High-Definition
Powered Loudspeaker
O W N E R ’ S M A N U A L
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22. Rigging Precautions: When mounting or suspending loudspeaker enclo-
sures, it is essential that load ratings, rigging techniques, and special
safety considerations be appropriate for the installation. Use only the
mounting/rigging points on the loudspeaker enclosure intended for
this purpose. The user must determine the load requirements, dynamic
loading, and any other contributing factors affecting the loudspeaker
installation. The user must determine the proper design factor for
specific applications and the required load rating of the connection to
structure. Comply with all applicable federal, state, and local regula-
tions.
Contents
IMPORTANT SAFETY INSTRUCTIONS
INTRODUCTION
2
3
3
4
5
7
7
8
9
9
9
10
11
12
13
14
15
FEATURES
HOOKUP DIAGRAMS
REAR PANEL FEATURES
PLACEMENT
ROOM ACOUSTICS
RIGGING
THERMAL CONSIDERATIONS
AC POWER
CARE AND MAINTENANCE
APPENDIX A: SERVICE INFORMATION
APPENDIX B: CONNECTIONS
APPENDIX C: TECHNICAL INFORMATION
HD1531 BLOCK DIAGRAM
HD1531 GRAPHS AND DIMENSIONS
HD1531 LIMITED WARRANTY
We strongly recommend the following rigging system practices:
• Documentation: Thoroughly document the mounting/rigging
design with detailed drawings and parts lists.
• Analysis: Have a licensed structural engineer or other qualified
professional review and approve the mounting/rigging design
before its implementation.
• Installation: Use personnel experienced and qualified for mount-
ing/rigging loudspeakers in accordance with and in compliance
with all federal, state and local regulations.
DANGER: Loudspeakers should be mounted or suspended only
by persons with knowledge of the proper hardware and rigging
techniques. When stacking or pole-mounting loudspeakers, be
sure that they are stabilized and secured from falling over or being ac-
cidentally pushed over. Failure to follow these precautions may result
in damage to the equipment, personal injury, or death.
Introduction
Features
The HD1531 Powered Loudspeaker represents the
first step into portable high-definition live sound, pro-
viding precise, articulate full-range sound at the high-
output levels demanded of modern PA systems. Three
Class-D Fast Recovery™ amplifiers efficiently drive
1800 Watts of total system power, providing maximum
output with minimal distortion. True high-definition
sound is possible thanks to an arsenal of technological
innovations including our patented acoustic correction
processing that was previously only available on high-
end stadium touring systems. This complex processing,
along with a phase-coherent electronic crossover and
transducer time-alignment provide unparalleled acous-
tic accuracy that has to be heard to be believed.
•
1800W of ultra-efficient Class-D Fast
Recovery™ amplification
•
•
•
LF 700W RMS / 1400W peak
MF 100W RMS / 200W peak
HF 100W RMS / 200W peak
•
High-definition audio processing includes:
•
•
•
Revolutionary patented acoustic correction
algorithms
Transducer time alignment and phase
correction
Precision 3-way crossover
•
Custom designed transducers by EAW
•
•
15” neodymium woofer with 3” voice coil
6” horn-loaded, high-output mid-range
transducer
The 15” neodymium woofer, 6” midrange transducer
and heat-treated titanium compression driver are
custom designed by the award winning engineering
team at EAW, delivering the ultimate in both quality and
performance. A user-adjustable 3-band contour EQ is
built into the loudspeaker and features a sweepable mid
frequency for precise tonal shaping.
•
1.75” compression driver with heat-treated
titanium diaphragm
•
•
User-adjustable 3-band contour EQ with
sweepable mid-frequency
Optimized wide-dispersion WaveFront™
high / mid horn system
•
•
•
•
Ultra-compact and lightweight
Integrated limiting and protection circuitry
Rugged all wood cabinet (15mm birch plywood)
12 integrated fly points for horizontal and
vertical rigging
All of these high-end components are housed in a
rugged, all-wood enclosure that not only protects, but
allows for multiple mounting options including flying
and pole-mounting. The HD1531 brings high-definition
sound to the world of portable PA systems.
•
Stand / pole mountable
3
Owner’s Manual
Part No. SW0738 Rev. B 05/09
©2004-2009 LOUD Technologies Inc. All Rights Reserved.
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Hookup Diagrams
To Next
Speaker
To Next
Speaker
Left
output
Right
output
line level line level
HD1531
HD1531
3
-
WAY HIGH DEFINITION POWERED LOUDSPEAKER
HD1531
EAKER
HD1531
3
-
WAY HIGH DEFINITION POWERED LOUDSPEAKER
IUDSPEAKER
–6dB
+6dB
–6dB
+6dB
–6dB
+6dB
–6dB
+6dB
1202-VLZ3
Mixer
DAISY-CHAINING MULTIPLE HD1531s
HD1531
reproduces all
frequencies
above the
HD1531
reproduces all
frequencies
above the
subwoofer’s
crossover point
subwoofer’s
crossover point
Line-level
Hi-pass
out
Line-level
Hi-pass
Pole
Mount
Pole
out
Power
Cord
Power
Cord
Mount
Left
line level
output
Right
line level
output
Full
Range
Full
Range
1202-VLZ3
Power
Cords
Power
Cords
Powered subwoofer
plays the low
Powered subwoofer
plays the low
Mixer
frequencies
frequencies
HD1531: 4-WAY SYSTEM WITH POWERED SUBWOOFERS
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Rear Panel Features
1. MAIN INPUT
This is a female XLR-type connector that accepts
a balanced line-level signal from a mixing console or
other signal source.
9
3
1
2
10
11
2. LOOP OUT
This is a male XLR-type connector that produces
exactly the same signal that is connected to the main in-
put jack. Use it to daisy-chain several HD1531's together
off the same signal source.
–6dB
+6dB
4
5
6
7
8
Contour EQ
This built-in 3-band EQ allows the HD1531 to be
tailored for any sound application. Use it to help com-
pensate for poor room acoustics, boost highs and lows
for low-volume applications, or for any other variety of
needs.
3. EQ ON
Press this in to engage the Contour EQ
circuit. The LED next to the switch will light to
indicate that the EQ is on. Use this switch to
engage or bypass the EQ, or toggle it repeatedly
while listening carefully to judge the EQ’s
effect.
4. LOW
+3
This knob allows up to
+2
3 dB of boost or cut at
80 Hz, with no change
+1
0
–1
in level at the unity
(U) mark. This is a
–2
–3
20Hz
100Hz
1kHz
10kHz 20kHz
shelving EQ.
5. MID
This knob allows up to 3 dB of boost or cut at a
mid frequency set by the freq knob (6), with no
change in level at the unity (U) mark. This is a
peaking EQ.
12
13
6. FREQ
This knob allows you to adjust the center
frequency of the mid-peaking EQ, from 100 Hz
to 8 kHz, with 600 Hz at the center position.
+3
+3
+2
+2
+1
0
–1
+1
0
–1
–2
–3
–2
–3
20Hz
100Hz
1kHz
10kHz 20kHz
20Hz
100Hz
1kHz
10kHz 20kHz
5
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7. HIGH
11. SIG/LIMIT LED
+3
+2
This knob allows up
This bi-color LED illuminates green whenever there is
a signal present at the main input connector. It senses
the signal just after the level control, so adjustments to
the level control will affect the sig/limit indicator.
to 3 dB of boost or cut
at 12 kHz, with no
change in level at the
unity (U) mark. This is
a shelving EQ.
+1
0
–1
–2
–3
20Hz
100Hz
1kHz
10kHz 20kHz
The HD1531 has a built-in limiter that helps to pre-
vent the amplifier outputs from clipping or overdriving
the transducers. The sig/limit indicator lights in yellow
when the limiter is activated. It's okay for it to blink
yellow occasionally, but if it blinks frequently or lights
continuously, turn down the level control until it only
blinks occasionally.
8. LEVEL
This controls the overall signal level at the input to
the built-in power amplifiers. It ranges from –6 dB to
+6 dB of gain. The center detent is 0 dB (unity gain).
Excessive limiting may lead to overheat-
ing, which in turn trips the thermal protect
circuitry and interrupts the performance. See
‘Thermal Considerations’ on page 9 for more informa-
tion.
9. POWER LIGHT ON
Press this switch in to turn on the front panel power
LED if a visual indicator is preferred. The LED next to
the switch will light as a reminder.
If this switch is out, and the HD1531 is turned on, the
LED on the front of the cabinet will not light, nor will
the LED next to the switch.
12. POWER
Use this switch to turn the HD1531 on and off. The
LED next to the switch will illuminate when powered
on. The front panel LED will also turn on, but only if the
power light on switch (9) is engaged.
10. THERMAL LED
The HD1531 is equipped with a thermal protection
circuit that monitors the internal temperature of the
amplifiers and heatsink. If the temperature exceeds a
safe operating level, this indicator lights and the input
signal is muted to allow the amplifiers to cool. When the
temperature cools to a safe level once again, the thermal
protection circuit deactivates, the thermal LED turns off
and the HD1531 returns to normal operation.
Press the bottom of this switch to put the speaker into
standby mode. The HD1531 will not function, but the
circuits are still live. To remove AC power, either turn
off the AC mains supply, or unplug the power cord from
the speaker and the AC mains supply.
As a general guide, the powered speakers
should be turned on last, after the mixer and
other sources. They should also be the first
things turned off. This will reduce the possi-
bility of any turn-on, or turn-off thumps in your speak-
ers.
When the HD1531 is in thermal protect mode, the
power LED (12) will remain lit, indicating that the unit
is still powered on despite the lack of output. If power
light on (9) is engaged, the front panel power LED will
go out when in thermal protect mode.
13. IEC AC Receptacle
This jack accepts the supplied 3-prong AC power cord.
Activation of the thermal protection circuit
is an indication that you should take steps to
avoid continued thermal problems. See “Ther-
mal Considerations” on page 9.
Before you plug the AC power cord into the
powered loudspeaker, make sure that the
voltage of your unit (listed above the IEC AC
receptacle) is the same voltage as your local
AC mains supply. Use only the power cord supplied.
Also, disconnecting the plug’s ground pin is dangerous.
Don’t do it. And no running with scissors either. Let's be
safe out there!
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•
•
Avoid placing loudspeakers in the corners of
a room. Doing so increases the low frequency
output and can cause the sound to be muddy
and indistinct.
Placement
WARNING: Installation should only be done by
an experienced technician. Improper installa-
tion may result in damage to the equipment,
injury or death. Make sure that the loudspeaker is
installed in a stable and secure way in order to avoid
any conditions that may be dangerous for persons or
structures.
Avoid placing loudspeakers against a wall. This,
too, increases the low frequency output, though
not as much as corner placement. However, this
is a good way to reinforce the low frequencies,
if so desired.
•
•
Avoid placing the speakers directly on a hol-
low stage floor. A hollow stage can resonate at
certain frequencies, causing peaks and dips in
the frequency response of the room. It is better
to place the loudspeakers on a sturdy table
or stand designed to handle the weight of the
HD1531.
The HD1531 speaker is designed to sit on the floor
or stage. It may also be pole-mounted via the built-in
socket on the bottom of the cabinet. Be sure the pole
is capable of supporting the weight of the HD1531. The
HD1531 may also be flown horizontally or vertically via
its 12 integrated fly points.
Check to make sure that the support surface (e.g.,
floor, etc.) has the necessary mechanical characteristics
to support the weight of the loudspeaker(s).
Position the loudspeakers so the high-frequency
drivers are 2 to 4 feet above ear level for the au-
dience (make allowances for a standing/danc-
ing in the aisles audience). High frequencies
are highly directional and tend to be absorbed
much easier than lower frequencies. By provid-
ing direct line-of-sight from the loudspeakers to
the audience, you increase the overall bright-
ness and intelligibility of the sound system.
When pole-mounting loudspeakers, be sure that they
are stabilized and secured from falling over or being
accidentally pushed over. Failure to follow these precau-
tions may result in damage to the equipment, personal
injury, or death.
You can create a horizontal array by placing the cabi-
nets side-by-side. However, you should have a good un-
derstanding of the relationship between the splay angle
(the angle between the facing sides of the cabinets),
the on-axis power, and frequency cancellation effects
between cabinets.
•
Highly reverberant rooms, like many gymna-
siums and auditoriums, are a nightmare for
sound system intelligibility. Multiple reflections
off the hard walls, ceiling, and floor play havoc
with the sound. Depending on the situation,
you may be able to take some steps to minimize
the reflections, such as putting carpeting on
the floors, closing draperies to cover large glass
windows, or hanging tapestries or other materi-
als on the walls to absorb some of the sound.
When two cabinets are positioned vertically side-
by-side, the actual splay angle is 20º (determined by
a 10º angle on each cabinet side). As the splay angle
increases toward the angle of horizontal coverage (90º
for the HD1531), the on-axis power decreases, but the
frequency response becomes smoother as the comb-fil-
tering effects (caused by the interaction in the area of
double-coverage) decrease.
However, in most cases, these remedies are not
possible or practical. So what do you do? Mak-
ing the sound system louder generally doesn’t
work because the reflections become louder,
too. The best approach is to provide as much di-
rect sound coverage to the audience as possi-
ble. The farther away you are from the speaker,
the more prominent will be the reflected sound.
As with any powered components, protect them from
moisture. Avoid installing the loudspeaker in places
exposed to harsh weather conditions. If you are setting
them up outdoors, make sure they are under cover if you
expect rain.
Use more speakers strategically placed so they
are closer to the back of the audience. If the
distance between the front and back speakers
is more than about 100 feet, you should use a
delay processor to time-align the sound. (Since
sound travels about 1 foot per millisecond, it
takes about 1/10 of a second to travel 100 feet.)
Room Acoustics
The HD1531 loudspeakers are designed to sound neu-
tral; that is, to reproduce the input signal as accurately
as possible.
Room acoustics play a crucial role in the overall per-
formance of a sound system. Here are some additional
placement tips to help overcome some typical room
problems that might arise:
Keep in mind that the Contour EQ is a great way to
compensate for some of these issues.
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Rigging Design Practices
Rigging a loudspeaker requires determining:
Rigging
HD1531s may be individually flown horizontally or
vertically using M10 X 1.5 X 37 mm forged shoulder
eyebolts.
1. The rigging methods and hardware that meet static,
shock, dynamic, and any other load requirements for
supporting the loudspeaker from structure.
WARNING: Installation should only be done by
an experienced technician. Improper instal-
lation may result in damage to the equip-
ment, injury or death. Make sure that the loudspeaker
is installed in a stable and secure way in order to avoid
any conditions that may be dangerous for persons or
structures.
2. The design factor for and the required WLL (Work-
ing Load Limit) for this support.
Mackie strongly recommends the following rigging
practices:
1. Documentation: Thoroughly document the design
with detailed drawings and parts lists.
WARNING: The cabinet is suitable for rigging
via its fly points. NEVER attempt to suspend
the HD1531 by its handles.
2. Analysis: Have a qualified professional, such as a
licensed Professional Engineer, review and approve the
design before its implementation.
3. Installation: Have a qualified professional rigger do
the installation and inspection.
4. Safety: Use adequate safety precautions and back-
up systems.
MP=Mounting Point
MP
MP
MP
MP
1ꢀ Fly Points
MP
MP
MP
MP
MP
MP
MP
Three each on the top and bottom
Two on the rear
Two per side
Flown Horizontally
Flown Vertically
Top Fly Points
Rear Fly Points (adjust angle)
Side Fly Points
Lower Rear Fly Point
(adjusts angle)
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built-in thermal switch will activate, muting the sig-
nal and lighting the thermal LED. When the amplifier
has cooled down to a safe operating temperature, the
thermal switch resets itself, and the HD1531 resumes
normal operation.
Rigging Hardware and Accessories
Rigging Mackie loudspeakers will invariably require
hardware not supplied by Mackie. Various types of load-
rated hardware are available from a variety of third-
party sources. There are a number of such companies
specializing in manufacturing hardware for, designing,
and installing rigging systems. Each one of these tasks
is a discipline in its own right. Because of the hazardous
nature of rigging work and the potential liability, engage
companies that specialize in these disciplines to do the
work required.
If the thermal switch activates frequently, try turning
down the level control a notch or two on the mixing con-
sole (or the back of the HD1531) to avoid overheating
the amplifier. Be aware that direct sunlight and/or hot
stage lights may be the culprit of an amplifier overheat-
ing.
Mackie does offer certain accessory rigging items,
primarily for attachment to the hardware integral with
the loudspeaker. Some items, such as eyebolts, may be
used with a variety of products. While these accessories
are intended to facilitate installation, the wide variety of
possible installation conditions and array configurations
do not permit Mackie to determine their suitability or
load rating for any particular application.
AC Power
Be sure the HD1531 is plugged into an outlet that
is able to supply the correct voltage specified for your
model. If the voltage should drop below 95% of the spec-
ified line voltage, the built-in amplifiers will no longer
be able to supply rated power. (They will continue to
operate down to 80% of the rated line voltage, but won’t
reach full power, resulting in lower headroom.)
Mackie is not in the business of providing complete
rigging systems, either as designers, manufacturers, or
installers. It is the responsibility of the installer to pro-
vide a properly engineered, load-certified rigging system
for supporting the loudspeaker from structure.
Be sure the electrical service can supply enough am-
perage for all the components connected to it.
We recommend that a stiff (robust) supply of AC
power be used because the amplifiers place high cur-
rent demands on the AC line. The more power that is
available on the line, the louder the speakers will play
and the more peak output power will be available for a
cleaner, punchier bass. A suspected problem of “poor
bass performance” is often caused by a weak AC supply
to the amplifiers.
Rigging Notes
The HD1531’s intergral mounting points are designed
to support only the weight of their own loudspeaker
with suitable, external hardware. This means that each
HD loudspeaker must be supported independently of
any other HD loudspeaker and any other loads.
A minimum of two rigging points must be used to hang
an HD1531. More may be used for creating the desired
hanging angle as shown in the illustrations on page 8.
All mounting points are fully load bearing so any two
may be used for rigging; no mounting points are restrict-
ed to angle control only.
Never remove the ground pin on the power
cord or any other component of the HD1531.
This is very dangerous.
Care and Maintenance
Your Mackie loudspeakers will provide many years of
reliable service if you follow these guidelines:
Thermal Considerations
•
Avoid exposing the loudspeakers to moisture. If
they are set up outdoors, be sure they are under
cover if rain is expected.
The HD1531 has three powerful built-in amplifiers ca-
pable of producing a combined 900 watts of rms power.
As an amplifier works, it produces heat. The higher the
signal level, the louder and hotter it gets. It is important
to dissipate the heat as quickly as possible. This results
in increased reliability and longevity for the amplifier.
•
Avoid exposure to extreme cold (below freezing
temperatures). If you must operate the loud-
speakers in a cold environment, warm up the
voice coils slowly by sending a low-level signal
through them for about 15 minutes prior to
high-power operation.
The amplifier module is mounted on a large heatsink,
which is cooled by convection where cool air is drawn
through its fins, carrying the heat away. In order for this
convection cooling to work efficiently, it is important
to provide adequate airspace behind the loudspeaker.
When positioning the HD1531, we recommend leaving at
least six inches of air space behind it.
•
Use a dry cloth to clean the cabinets. Only do
this when the power is turned off. Avoid getting
moisture into any of the openings of the cab-
inet, particularly where the drivers are located.
In the unlikely event of the amplifier overheating, a
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the mixer and the loudspeakers. You may have
your positive and negative connections reversed
at one end of one cable, causing one loud-
speaker to be out-of-phase.
Appendix A: Service
Information
Poor sound
If you think your Mackie product has a problem,
please check out the following troubleshooting tips and
do your best to confirm the problem. Visit the Support
section of our website (www.mackie.com/support)
where you will find lots of useful information such as
FAQs and other documentation. You may find the answer
to the problem without having to send your Mackie
product away.
•
Is it loud and distorted? Make sure that you’re
not overdriving a stage in the signal chain.
Verify that all level controls are set properly.
•
Is the input connector plugged completely into
the jack? Be sure all connections are secure.
Noise
Troubleshooting
•
Make sure all connections to the active loud-
speakers are good and sound.
No power
•
•
Make sure none of the signal cables are routed
near AC cables, power transformers, or other
EMI-inducing devices.
•
•
•
Is it plugged in? Make sure the AC outlet is live
(check with a tester or lamp).
Is there a light dimmer or other SCR-based
device on the same AC circuit as the HD1531?
Use an AC line filter or plug the HD1531 into a
different AC circuit.
Our next favorite question: Is the power switch
on? If not, try turning it on.
Is the power LED on the rear panel glowing
green? If not, make sure the AC outlet is live. If
so, refer to “No sound” below.
Hum
•
The internal AC line fuse may be blown. This is
not a user serviceable part. If you suspect the
AC line fuse is blown, please see the "Repair"
section next.
•
Try disconnecting the cable connected to the
main input jack. If the noise disappears, it
could be a “ground loop,” rather than a problem
with the HD1531. Try some of the following
troubleshooting ideas:
No sound
•
•
Use balanced connections throughout your
system for the best noise rejection.
•
Is the input level control for the input source
turned all the way down? Verify that all the
volume controls in the system are properly
adjusted.
Whenever possible, plug all the audio equip-
ment’s linecords into outlets which share a
common ground. The distance between the
outlets and the common ground should be as
short as possible.
•
Is the signal source working? Make sure the
connecting cables are in good repair and
securely connected at both ends. Make sure the
output volume (gain) control on the mixing
console is turned up sufficiently to drive the
inputs of the speaker.
Repair
For warranty service, refer to the warranty informa-
tion on page 15.
•
•
Make sure the mixer does not have a Mute on
or a Processor loop engaged. If you find some-
thing like this, make sure the volume/gain is
turned down before disengaging the offending
switch.
Non-warranty service for Mackie products is avail-
able at a factory-authorized service center. To locate
“Support” and select “Locate a Service Center.” Service
for Mackie products living outside the United States can
be obtained through local dealers or distributors.
Is the thermal indicator lit red on the rear
panel? Make sure there is at least six inches of
free space behind the HD1531.
If you do not have access to our website, you may call
the Tech Support department at 1-800-898-3211, Mon-
day-Friday, during normal business hours, Pacific Time,
to explain the problem. Tech Support will tell you where
the nearest factory-authorized service center is located
in your area.
Poor bass performance
•
Check the polarity of the connections between
10
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Appendix B: Connections
“XLR” Connectors
The HD1531 has one female XLR input that accepts
a balanced line-level signal. When connecting a balanced
signal, be sure it’s wired per AES (Audio Engineering
Society) standards:
XLR
Hot (+) Pin 2
Cold (–)Pin 3
Shield (Ground)Pin 1
Balanced XLR Connectors
There is also a male XLR connector on the HD1531
labeled loop out. This is also wired according to the AES
standards listed above.
The loop out connector allows you to connect several
HD1531’s. Simply plug the signal source (i.e., mixer
output) into the input jack, and patch that speaker’s
loop out jack to the next speaker’s input jack, and so on,
daisy-chaining multiple speakers. See page 4 for a visual
example of daisy-chaining.
There is a limit to how many you can
daisy-chain together. A general rule is to
maintain a load impedance ten times or
more than the source impedance to prevent
excessive loading on the source. For example, if your
mixer has an output impedance of 120 ohms, then you
can daisy chain up to nine HD1531s. This is a load of
1222 ohms (HD1531 input impedance=11 kohms; 9 of
these in parallel=1222 ohms). Since microphones typi-
cally have a higher output impedance, you should limit
daisy-chaining from a mic source to two HD1531s.
The loop out jack is wired straight from the main
input connector — there is no electronic circuitry
between — so the signal coming out of the loop out jack
is exactly the same as the signal going in.
11
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Appendix C: Technical Information
HD1531 Specifications
Acoustic Performance:
Frequency Response (-10 dB)
Frequency Response (-3 dB)
Horizontal Coverage (-6 dB)
Power Amplifiers
Low Frequency Power Amplifier
Rated Power
38 Hz-20 kHz
50 Hz-18 kHz
700 watts rms
1400 watts peak
90 degrees averaged
2 kHz to 10 kHz
Rated THD
Design
< 0.03%
Class D
Vertical Coverage (-6 dB)
Directivity Index (dB)
Directivity Factor (Q)
40 degrees averaged
2 kHz to 10 kHz
Mid Frequency Power Amplifier
Rated Power
10.7 averaged
2 kHz to 10 kHz
100 watts rms each
200 watts peak
11.9 averaged
2 kHz to 10 kHz
Rated THD
Design
< 0.03%
Class D
Max peak SPL (calculated)1
Max peak SPL (measured)2
Crossover Points
135 dB
High Frequency Power Amplifier
Rated Power
126 dB
100 watts rms each
200 watts peak
400 Hz, 1500 Hz
Rated THD
Design
< 0.03%
Class D
Equalization
Contour EQ
Input/Output
Input Type
Low Shelving
-3 dB to +3 dB
80 Hz, 6 dB / octave
Female XLR balanced
11 kohm balanced
Male XLR balanced
Input Impedance
Loop Out
Mid-Peaking
-3 dB to +3 dB
100 Hz to 8 kHz, Q=1.5
High Shelving
-3 dB to +3 dB
12 kHz, 6 dB / octave
Line Input Power
US model
120 VAC, 60 Hz
9 amps
High-Frequency Section
Voice Coil Diameter
Horn Entry Diameter
Diaphragm Material
Magnet Material
Recommended Service
European model
Recommended Service
AC Connector
1.75” / 44.5 mm
1.0” / 25 mm
230 VAC, 50 Hz
5 amps
Heat-treated titanium
Ferrite
3-pin IEC 250 VAC
Safety Features
Input Protection:
RMS limiting, power supply and
amplifier thermal protection
Mid-Frequency Section
Diameter
6.0” / 152.4 mm
Paper
Display LEDs:
Power ON, EQ ON, Sig / Limit,
Thermal protection, Front Power
ON
Diaphragm Material
Magnet Material
Ferrite
Construction Features
Low-Frequency Section
Woofer Diameter
Basic Design
Trapezoidal, 20 degree included
angle
15.0” / 381 mm
3.0” / 76.2 mm
Paper
Material
15 mm exterior grade premium
birch plywood
Voice Coil Diameter
Diaphragm Material
Magnet Material
Finish
High durability black paint
One on each side
Neodymium
Handles
Grille
1 Calculated from driver sensitivity and amplifier power.
Powder-coated galvanized steel
Twelve M10 x 1.5 mm
2 Measured with pink noise, free field at 1 meter, before limiting.
Fly Points
1ꢀ
HD1531
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Physical Properties
Height
35.40 in / 900 mm
18.25 in / 463.5 mm
11.82 in / 300.2 mm
18.81 in / 477.8 mm
96 lb / 44 kg
Front Width
Rear Width
Depth
Weight
Mounting Methods
Floor mount, pole mount, or fly via 12 integrated M10 mounting
points (using M10 x 1.5 x 37 mm forged shoulder eyebolts). See
page 8 for more information.
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 registered trade-
marks of LOUD Technologies Inc.
All other brand names mentioned are trademarks or registered
trademarks of their respective holders, and are hereby acknowl-
edged.
©2009 LOUD Technologies Inc.
All Rights Reserved.
HD1531 Block Diagram
HD
Digital to
Analog
Converter
Amp
Amp
HF
Loudspeaker
Processing
Limiter
Limiter
Signal /
Limit LED
3-Band Contour EQ
LO
MID
HI
HD
Digital to
Analog
Converter
Analog to
Digital
Converter
Input
XLR
MF
Level
Control
Loudspeaker
Processing
Mute
80
100-8K
12K
Loop
Out
XLR
HD
Digital to
Analog
Converter
LF
Loudspeaker
Processing
Limiter
Amp
Thermal
Monitoring
Correct disposal of this product. This symbol indicates that this product should not be disposed of with your household waste, according to the WEEE Directive (2002/96/EC) and your national law. This product
should be handed over to an authorized collection site for recycling waste electrical and electronic equipment (EEE). Improper handling of this type of waste could have a possible negative impact on the environment and
human health due to potentially hazardous substances that are generally associated with EEE. At the same time, your cooperation in the correct disposal of this product will contribute to the effective usage of natural
resources. For more information about where you can drop off your waste equipment for recycling, please contact your local city office, waste authority, or your household waste disposal service.
13
Owner’s Manual
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HD1531 Frequency Response On-Axis
120
110
100
90
80
70
20
100
1000
20000
Frequency (Hz)
HD1531 Beamwidth vs. Frequency
HD1531 Directivity vs. Frequency
360
20
100
10
100
10
10
1
/ Vertical
1
1
20
100
1000
20000
100
1000
20000
Frequency (Hz)
Frequency (Hz)
HD1531 Dimensions
WEIGHT
96.0 lb
44 kg
11.82 in/
300 mm
35.4 in/
900 mm
18.81 in/
478 mm
18.25 in/
464 mm
1ꢁ
HD1531
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Mackie Limited Warranty
Please keep your sales receipt in a safe place.
This Limited Product Warranty (“Product Warranty”) is provided by LOUD Technologies Inc. (“LOUD”)
and is applicable to products purchased in the United States or Canada through a LOUD-authorized
reseller or dealer. The Product Warranty will not extend to anyone other than the original purchaser of
the product (hereinafter, “Customer,” “you” or “your”).
For products purchased outside the U.S. or Canada, please visit www.mackie.com/warranty to find
contact information for your local distributor, and information on any warranty coverage provided by the
distributor in your local market.
LOUD warrants to Customer that the product will be free from defects in materials and workmanship
under normal use during the Warranty Period. If the product fails to conform to the warranty then LOUD
or its authorized service representative will at its option, either repair or replace any such nonconforming
product, provided that Customer gives notice of the noncompliance within the Warranty Period to the
Company at: www.mackie.com/support or by calling LOUD technical support at 1.800.898.3211 (toll-
free in the U.S. and Canada) during normal business hours Pacific Time, excluding weekends or LOUD
holidays. Please retain the original dated sales receipt as evidence of the date of purchase. You will need it
to obtain any warranty service.
For full terms and conditions, as well as the specific duration of the Warranty for this product, please visit
www.mackie.com/warranty.
The Product Warranty, together with your invoice or receipt, and the terms and conditions located
at www.mackie.com/warranty constitutes the entire agreement, and supersedes any and all prior
agreements between LOUD and Customer related to the subject matter hereof. No amendment,
modification or waiver of any of the provisions of this Product Warranty will be valid unless set forth in a
written instrument signed by the party to be bound thereby.
Need help with your new powered loudspeaker?
• Telephone 1-ꢄ00-ꢄꢅꢄ-3ꢀ11 to speak with one of our splendid technical support chaps (Monday through Friday, normal business hours, PST).
15
Owner’s Manual
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16220 Wood-Red Road NE • Woodinville, WA 98072 • USA
United States and Canada: 800.898.3211
Europe, Asia, Central and South America: 425.487.4333
Middle East and Africa: 31.20.654.4000
E-mail: [email protected]
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