HD1521
2-Way High-Definition
Powered Loudspeaker
OWNER’S MANUAL
HD1521
Important Safety Instructions
1. Read these instructions. 2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers,
stoves, or other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding-type
plug. A polarized plug has two blades with one wider than the other.
A grounding-type plug has two blades and a third grounding prong.
The wide blade or the third prong are provided for your safety. If the
provided plug does not fit into your outlet, consult an electrician for
replacement of the obsolete outlet.
10.Do not overload wall outlets and extension cords as this can result in a
risk of fire or electric shock.
11.Protect the power cord from being walked on or pinched particularly at
plugs, convenience receptacles, and the point where they exit from the
apparatus.
12.Only use attachments/accessories specified by the manufacturer.
PORTABLE CART
13.Use only with a cart, stand, tripod, bracket, or
WARNING
table specified by the manufacturer, or sold with
the apparatus. When a cart is used, use caution
when moving the cart/apparatus combination to
avoid injury from tip-over.
14.Unplug this apparatus during lightning storms or
when unused for long periods of time.
15.Refer all servicing to qualified service personnel. Servicing is required
when the apparatus has been damaged in any way, such as powersupply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.
16.This apparatus shall not be exposed to dripping or splashing, and no
object filled with liquids, such as vases or beer glasses, shall be placed
on the apparatus.
17.This apparatus has been designed with Class-I construction and must
be connected to a mains socket outlet with a protective earthing connection (the third grounding prong).
18.The MAINS plug or an appliance coupler is used as the disconnect
device, so the disconnect device shall remain readily operable.
CAUTION
AVIS
RISK OF ELECTRIC SHOCK. DO NOT OPEN
RISQUE DE CHOC ELECTRIQUE. NE PAS OUVRIR
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER (OR BACK)
NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL
ATTENTION: POUR EVITER LES RISQUES DE CHOC ELECTRIQUE, NE PAS ENLEVER LE COUVERCLE.
AUCUN ENTRETIEN DE PIECES INTERIEURES PAR L'USAGER.
CONFIER L'ENTRETIEN AU PERSONNEL QUALIFIE.
AVIS: POUR EVITER LES RISQUES D'INCENDIE OU D'ELECTROCUTION, N'EXPOSEZ PAS CET ARTICLE
A LA PLUIE OU A L'HUMIDITE
The lightning flash with arrowhead symbol within an equilateral triangle is
intended to alert the user to the presence of uninsulated "dangerous
voltage" within the product's enclosure, that may be of sufficient magnitude
to constitute a risk of electric shock to persons.
Le symbole éclair avec point de flèche à l'intérieur d'un triangle équilatéral
est utilisé pour alerter l'utilisateur de la présence à l'intérieur du coffret de
"voltage dangereux" non isolé d'ampleur suffisante pour constituer un risque
d'éléctrocution.
The exclamation point within an equilateral triangle is intended to alert the
user of the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the appliance.
Le point d'exclamation à l'intérieur d'un triangle équilatéral est employé
pour alerter les utilisateurs de la présence d'instructions importantes pour le
fonctionnement et l'entretien (service) dans le livret d'instruction
accompagnant l'appareil.
HD1521
19.NOTE: This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or
more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the
receiver.
• Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for
help.
CAUTION: Changes or modifications to this device not expressly
approved by LOUD Technologies Inc. could void the user's authority to
operate the equipment under FCC rules.
20.This apparatus does not exceed the Class A/Class B (whichever is
applicable) limits for radio noise emissions from digital apparatus as
set out in the radio interference regulations of the Canadian Department
of Communications.
ATTENTION — Le présent appareil numérique n’émet pas de bruits
radioélectriques dépassant las limites applicables aux appareils
numériques de class A/de class B (selon le cas) prescrites dans le
réglement sur le brouillage radioélectrique édicté par les ministere des
communications du Canada.
21.Exposure to extremely high noise levels may cause permanent hearing
loss. Individuals vary considerably in susceptibility to noise-induced
hearing loss, but nearly everyone will lose some hearing if exposed to
sufficiently intense noise for a period of time. The U.S. Government’s
Occupational Safety and Health Administration (OSHA) has specified
the permissible noise level exposures shown in the following chart.
According to OSHA, any exposure in excess of these permissible limits
could result in some hearing loss. To ensure against potentially dangerous exposure to high sound pressure levels, it is recommended that all
persons exposed to equipment capable of producing high sound pressure levels use hearing protectors while the equipment is in operation.
Ear plugs or protectors in the ear canals or over the ears must be worn
when operating the equipment in order to prevent permanent hearing
loss if exposure is in excess of the limits set forth here:
Duration,
per day in
hours
8
6
4
3
2
1.5
1
Sound Level
dBA, Slow
Response
90
92
95
97
100
102
105
0.5
110
0.25 or less 115
Typical Example
Duo in small club
Subway Train
Very loud classical music
Steve screaming at Troy about
deadlines
Loudest parts at a rock concert
WARNING — To reduce the risk of fire or electric shock, do not
expose this apparatus to rain or moisture.
IMPORTANT SAFETY INSTRUCTIONS INTRODUCTION 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
HD1521 BLOCK DIAGRAM HD1521 GRAPHS AND DIMENSIONS HD1521 LIMITED WARRANTY 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 accidentally pushed over. Failure to follow these precautions may result
in damage to the equipment, personal injury, or death.
Introduction
2
3
3
4
5
7
7
8
9
9
9
10
11
12
13
14
15
Owner’s Manual
Contents
22.Rigging Precautions: When mounting or suspending loudspeaker enclosures, 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 regulations.
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 mounting/rigging loudspeakers in accordance with and in compliance
with all federal, state and local regulations.
Features
The HD1521 Powered Loudspeaker represents the
first step into portable high-definition live sound, providing precise, articulate full-range sound at the high-output levels demanded of modern PA systems. Two Class-D
Fast Recovery™ amplifiers efficiently drive 1600 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 acoustic accuracy
that has to be heard to be believed.
The 15” neodymium woofer 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.
• 1600W of ultra-efficient Class-D Fast Recovery™ amplification
• LF 700W RMS / 1400W peak
• HF 100W RMS / 200W peak
• High-definition audio processing includes:
• Revolutionary patented acoustic correction algorithms
• Transducer time alignment and phase correction
• Precision 2-way crossover
• Custom designed transducers by EAW
• 15” neodymium woofer with 3” voice coil
• 1.75” compression driver with heat-treated titanium diaphragm
• User-adjustable 3-band contour EQ with
sweepable mid-frequency
• 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
• Stand / pole mountable
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 HD1521 brings high-definition
sound to the world of portable PA systems.
Owner’s Manual
Part No. SW0739 Rev. B 05/09
©2004-2009 LOUD Technologies Inc. All Rights Reserved.
HD1521
Hookup Diagrams
To Next
Speaker
To Next
Speaker
Left
line level
output
Right
line level
output
–6dB
–6dB
–6dB
+6dB
–6dB
+6dB
+6dB
1202-VLZ3
Mixer
Daisy-Chaining MULTIPLE HD1521 s
HD1521 reproduces
all frequencies
above the subwoofer’s
crossover point
Line-level
Hi-pass
output
HD1521 reproduces
all frequencies
above the subwoofer’s
crossover point
Pole
Mount
Line-level
Hi-pass
output
Power
Cord
Left
line level
output
Pole
Mount
Power
Cord
Right
line level
output
Full
Range
Full
Range
1202-VLZ3
Power
Cords
Powered subwoofer
plays the low
frequencies
Power
Cords
Mixer
Powered subwoofer
plays the low
frequencies
HD1521: 3-WAY SYSTEM WITH POWERED SUBWOOFERS
HD1521
+6dB
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.
2. LOOP OUT
This is a male XLR-type connector that produces
exactly the same signal that is connected to the main input jack. Use it to daisy-chain several HD1521's together
off the same signal source.
Contour EQ
9
3
1
10
11
2
–6dB
4
5
6
7
+6dB
8
Owner’s Manual
Rear Panel Features
This built-in 3-band EQ allows the HD1521 to be
tailored for any sound application. Use it to help compensate for poor room acoustics, boost highs and lows
for low-volume applications, or for any other variety of
needs.
3. EQ ON
Press this switch 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
This knob allows up to 3 dB of boost or cut at 80 Hz, with no change in level at the unity (U) mark. This is a shelving EQ.
+3
+2
+1
0
–1
–2
–3
20Hz
100Hz
1kHz
10kHz 20kHz
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.
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
+1
0
0
–1
–1
13
–2
–2
–3
–3
20Hz
12
100Hz
1kHz
10kHz 20kHz
20Hz
100Hz
1kHz
10kHz 20kHz
Owner’s Manual
HD1521
11. SIG/LIMIT LED
7. HIGH
This knob allows up 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.
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.
+3
+2
+1
0
–1
–2
–3
20Hz
100Hz
1kHz
10kHz 20kHz
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).
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 HD1521 is turned on, the
LED on the front of the cabinet will not light, nor will
the LED next to the switch.
10. THERMAL LED
The HD1521 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 HD1521 returns to normal operation.
When the HD1521 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.
Activation of the thermal protection circuit
is an indication that you should take steps to
avoid continued thermal problems. See “Thermal Considerations” on page 9.
HD1521
The HD1521 has a built-in limiter that helps to prevent 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.
Excessive limiting may lead to overheating, which in turn trips the thermal protect
circuitry and interrupts the performance. See
‘Thermal Considerations’ on page 9 for more information.
12. POWER
Use this switch to turn the HD1521 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.
Press the bottom of this switch to put the speaker into
standby mode. The HD1521 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 possibility of any turn-on, or turn-off thumps in your speakers.
13. IEC AC Receptacle
This jack accepts the supplied ­3-prong AC power cord.
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!
WARNING: Installation should only be done by
an experienced technician. Improper installation 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.
The HD1521 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 HD1521. The
HD1521 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).
When pole-mounting loudspeakers, be sure that they
are stabilized and secured from falling over or being
accidentally pushed over. Failure to follow these precautions may result in damage to the equipment, personal
injury, or death.
You can create a horizontal array by placing the cabinets side-by-side. However, you should have a good understanding 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.
When two cabinets are positioned vertically sideby-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 (80º
for the HD1521), the on-axis power decreases, but the
frequency response becomes smoother as the comb-filtering effects (caused by the interaction in the area of
double-coverage) decrease.
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.
Room Acoustics
The HD1521 loudspeakers are designed to sound neutral; that is, to reproduce the input signal as accurately
as possible.
Room acoustics play a crucial role in the overall performance of a sound system. Here are some additional
placement tips to help overcome some typical room
problems that might arise:
• 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.
• 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 hollow 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
HD1521.
Owner’s Manual
Placement
• Position the loudspeakers so the high-frequency
drivers are 2 to 4 feet above ear level for the audience (make allowances for a standing/dancing in the aisles audience). High frequencies
are highly directional and tend to be absorbed
much easier than lower frequencies. By providing direct line-of-sight from the loudspeakers to
the audience, you increase the overall brightness and intelligibility of the sound system.
• Highly reverberant rooms, like many gymnasiums 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 materials on the walls to absorb some of the sound.
However, in most cases, these remedies are not
possible or practical. So what do you do? Making the sound system louder generally doesn’t
work because the reflections become louder,
too. The best approach is to provide as much direct sound coverage to the audience as possible. The farther away you are from the speaker,
the more prominent will be the reflected sound.
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.)
Keep in mind that the Contour EQ is a great way to
compensate for some of these issues.
Owner’s Manual
HD1521
Rigging
Rigging Design Practices
Rigging a loudspeaker requires determining:
HD1521s may be individually flown horizontally or
vertically using M10 X 1.5 X 37 mm forged shoulder
eyebolts.
WARNING: Installation should only be done by
an experienced technician. Improper installation 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.
WARNING: The cabinet is suitable for rigging
via its fly points. NEVER attempt to suspend
the HD1521 by its handles.
1. The rigging methods and hardware that meet static,
shock, dynamic, and any other load requirements for
supporting the loudspeaker from structure.
2. The design factor for and the required WLL (Working Load Limit) for this support.
Mackie strongly recommends the following rigging
practices:
1. Documentation: Thoroughly document the design
with detailed drawings and parts lists.
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 backup systems.
12 Fly Points
MP
MP
MP
MP=Mounting Point
MP
MP
MP
MP
MP
MP
Two per side
Flown Horizontally
Rear Fly Points
(adjust angle)
MP
MP
Two on the rear
Three each on the top and bottom
Flown Vertically
Top Fly Points
Side Fly Points
Lower Rear Fly Point
(adjusts angle)
HD1521
Rigging Mackie loudspeakers will invariably require
hardware not supplied by Mackie. Various types of loadrated hardware are available from a variety of thirdparty 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.
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.
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 provide a properly engineered, load-certified rigging system
for supporting the loudspeaker from structure.
Rigging Notes
The HD1521’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 HD1521. 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 restricted to angle control only.
Thermal Considerations
The HD1521 has two powerful built-in amplifiers capable of producing a combined 800 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.
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 HD1521, we recommend leaving at
least six inches of air space behind it.
In the unlikely event of the amplifier overheating, a
built-in thermal switch will activate, muting the signal and lighting the thermal LED. When the amplifier
has cooled down to a safe operating temperature, the
thermal switch resets itself, and the HD1521 resumes
normal operation.
If the thermal switch activates frequently, try turning
down the level control a notch or two on the mixing console (or the back of the HD1521) to avoid overheating
the amplifier. Be aware that direct sunlight and/or hot
stage lights may be the culprit of an amplifier overheating.
AC Power
Owner’s Manual
Rigging Hardware and Accessories
Be sure the HD1521 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 specified 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.)
Be sure the electrical service can supply enough amperage for all the components connected to it.
We recommend that a stiff (robust) supply of AC
power be used because the amplifiers place high current 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.
Never remove the ground pin on the power
cord or any other component of the HD1521.
This is very dangerous.
Care and Maintenance
Your Mackie loudspeakers will provide many years of
reliable service if you follow these guidelines:
• Avoid exposing the loudspeakers to moisture. If
they are set up outdoors, be sure they are under
cover if rain is expected.
• Avoid exposure to extreme cold (below freezing
temperatures). If you must operate the loudspeakers 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.
• 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 cabinet, particularly where the drivers are located.
Owner’s Manual
HD1521
Appendix A: Service
Information
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.
Troubleshooting
No power
• Is it plugged in? Make sure the AC outlet is live
(check with a tester or lamp).
• 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.
• 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.
No sound
• 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.
• 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.
• Make sure the mixer does not have a Mute on
or a Processor loop engaged. If you find something like this, make sure the volume/gain is
turned down before disengaging the offending
switch.
• Is the thermal indicator lit red on the rear
panel? Make sure there is at least six inches of
free space behind the HD1521.
Poor bass performance
• Check the polarity of the connections between
10
HD1521
the mixer and the loudspeakers. You may have
your positive and negative connections reversed
at one end of one cable, causing one loudspeaker to be out-of-phase.
Poor sound
• 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
• Make sure all connections to the active loudspeakers are good and sound.
• Make sure none of the signal cables are routed
near AC cables, power transformers, or other
EMI-inducing devices.
• Is there a light dimmer or other SCR-based
device on the same AC circuit as the HD1521?
Use an AC line filter or plug the HD1521 into a
different AC circuit.
Hum
• 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 HD1521. Try some of the following
troubleshooting ideas:
• Use balanced connections throughout your
system for the best noise rejection.
• Whenever possible, plug all the audio equipment’s linecords into outlets which share a
common ground. The distance between the
outlets and the common ground should be as
short as possible.
Repair
For warranty service, refer to the warranty information on page 15.
Non-warranty service for Mackie products is available at a factory-authorized service center. To locate
the nearest service center, visit www.mackie.com, click
“Support” and select “Locate a Service Center.” Service
for Mackie products living outside the United States can
be obtained through local dealers or distributors.
If you do not have access to our website, you may call
the Tech Support department at 1-800-898-3211, Monday-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.
Owner’s Manual
Appendix B: Connections
“XLR” Connectors
The HD1521 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 HD1521
labeled loop out. This is also wired according to the AES
standards listed above.
The loop out connector allows you to connect several
HD1521’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 HD1521s. This is
a load of 1222 ohms (HD1521 input impedance=11
kohms; 9 of these in parallel=1222 ohms). Since microphones typically have a higher output impedance, you
should limit daisy-chaining from a mic source to two
HD1521s.
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.
Owner’s Manual
11
HD1521
Appendix C: Technical Information
HD1521 Specifications
Power Amplifiers
Acoustic Performance:
Frequency Response (-10 dB)
40 Hz-20 kHz
Low Frequency Power Amplifier
Frequency Response (-3 dB)
50 Hz-18 kHz
Horizontal Coverage (-6 dB)
80 degrees averaged
2 kHz to 10 kHz
Rated Power
700 watts rms
1400 watts peak
Rated THD
< 0.03%
Vertical Coverage (-6 dB)
50 degrees averaged
2 kHz to 10 kHz
Design
Class D
Directivity Index (dB)
11.4 averaged
2 kHz to 10 kHz
Rated Power
100 watts rms
200 watts peak
Directivity Factor (Q)
14.0 averaged
2 kHz to 10 kHz
Rated THD
< 0.03%
Max peak SPL (calculated)
135 dB
Design
Class D
Max peak SPL (measured)
125 dB
Crossover Point
1200 Hz
Equalization
Contour EQ
Low Shelving
-3 dB to +3 dB
80 Hz, 6 dB / octave
Mid-Peaking
High Shelving
Input/Output
Input Type
Female XLR balanced
Input Impedance
11 kohm balanced
Loop Out
Male XLR balanced
Line Input Power
US model
120 VAC, 60 Hz
-3 dB to +3 dB
100 Hz to 8 kHz, Q=1.5
9 amps
European model
230 VAC, 50 Hz
-3 dB to +3 dB
12 kHz, 6 dB / octave
5 amps
High-Frequency Section
Recommended Service
Recommended Service
AC Connector
3-pin IEC 250 VAC
Safety Features
Voice Coil Diameter
1.75” / 44.5 mm
Horn Entry Diameter
1.0” / 25 mm
Diaphragm Material
Heat-treated titanium
Magnet Material
Ferrite
Input Protection:
RMS limiting, power supply and amplifier thermal protection
Display LEDs:
Power ON, EQ ON, Sig/Limit, Thermal protection, Front Power ON
Construction Features
Low-Frequency Section
12
High Frequency Power Amplifier
Basic Design
Trapezoidal, 20 degree included angle
Paper
Cabinet
15 mm exterior grade premium birch plywood
Neodymium
Finish
High durability black paint
Woofer Diameter
15.0” / 381 mm
Voice Coil Diameter
3.0” / 76.2 mm
Diaphragm Material
Magnet Material
Handles
One on each side
Calculated from driver sensitivity and amplifier power.
Grille
Powder-coated galvanized steel
Measured with pink noise, free field at 1 meter, before limiting.
Fly Points
Twelve M10 x 1.5 mm
HD1521
Height
30.00 in / 762 mm
Front Width
18.25 in / 463.5 mm
Rear Width
11.82 in / 300.2 mm
Depth
18.81 in / 477.8 mm
Weight
80 lb / 36 kg
Owner’s Manual
Physical Properties
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 trademarks of LOUD Technologies Inc.
All other brand names mentioned are trademarks or ­registered
trademarks of their respective holders, and are hereby acknowledged.
©2009 LOUD Technologies Inc.
All Rights Reserved.
HD1521 Block Diagram
Signal /
Limit LED
Input
XLR
Loop
Out
XLR
Level
Control
Analog to
Digital
Converter
3-Band Contour EQ
LO
MID
HI
80
100-8K
12K
HD
Loudspeaker
Processing
Limiter
Digital to
Analog
Converter
Amp
HF
HD
Loudspeaker
Processing
Limiter
Digital to
Analog
Converter
Amp
LF
Mute
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.
Owner’s Manual
13
1/
70
20
100
1000
HD1521
HD1521 Frequency Response On-Axis
20000
Frequency (Hz)
100
90
100
90
80
70
80
70
20
100
20
100
100
10
1000
1
Horizontal 20000
/ Vertical
Frequency (Hz)
100
1000
1000
20000
Frequency (Hz)
Beamwidth (Degrees)
100
10
100
10
1
1
Horizontal / Vertical
100
HD1521 Directivity vs. Frequency
Horizontal / Vertical
100
Directivity Index (dB)
Beamwidth (Degrees)
HD1521 Beamwidth vs. Frequency
360
360
20
100
10
10
1000
Frequency
1000
20000
20000
1
(Hz)
20
100
1000
100
10
10
1
1
20
30.0 in/
762 mm
100
100
1000
20
100
HD1521
10
1000
1
Frequency
(Hz)
1
20000
11.82 in/
300 mm
20000
Frequency (Hz)
18.81 in/
478 mm
14
Directivity Factor (Q)
Directivity Index (dB)
10
Directivity Index (dB)
20
HD1521 Dimensions
1
20000
Frequency (Hz)
Frequency (Hz)
20
20000
Frequency (Hz)
18.25 in/
464 mm
WEIGHT
80.0 lb
36 kg
Directivity Factor (Q)
110
360
110
Directivity Factor (Q)
1/3 Octave Response
dB SPL @ 2.83 V
120
Beamwidth (Degrees)
1/3 Octave Response
dB SPL @ 2.83 V
120
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.
Owner’s Manual
Mackie Limited Warranty
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 (tollfree 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?
• Visit www.mackie.com and click Support to find: FAQs, manuals, and addendums.
• Email us at: techmail@mackie.com.
• Telephone 1-800-898-3211 to speak with one of our splendid technical support chaps (Monday through Friday, normal business hours, PST).
Owner’s Manual
15
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
Fax: 425.487.4337 • www.mackie.com
E-mail: sales@mackie.com