Mackie Speaker System HD1531 User Manual

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  
HD1531  
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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!  
HD1531  
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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)  
HD1531  
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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.  
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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
Horizontal
/ 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?  
• Email us at: [email protected].  
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  
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