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INTRODUCTION

crossover, power amplifiers, and drivers into a
single cabinet, and we’ve taken full advantage of
these benefits in the design of the HR624.
• The crossover point is designed so that the

high and low frequency drivers are fed only
the frequencies they are best able to reproduce.

• The amplifiers are designed to provide

maximum acoustic output from the speakers,
yet minimize the danger of speaker damage
due to overdriving.

• In addition, the amplifiers’ gain and fre-

quency responses are individually
hand-trimmed to compensate for typical
manufacturing tolerances between the
drivers and produce a smooth frequency
response from 52Hz to 20kHz (

±

1.5 dB).

Thank you for choosing Mackie Designs’

HR624 Studio Monitors. We realize that monitors
are a critically important tool whether your
application is studio recording, audio/video post
production, hi-fi, or home theater. Knowing this,
Greg Mackie had a simple mandate: Design a
reference monitor with a degree of accuracy and
versatility unmatched by any other in its size and
price category — or 

any

 size and price category

for that matter. The mandate was simple, but
accomplishing it was another story!

Investments in Excellence...

To accomplish the task at hand, Greg and the

New Product Development team realized that a
commitment was required in terms of new resources
and new equipment. So we recruited some of the
best speaker and acoustic engineers in the indus-
try to assist in the design of the HR624. And we
invested in some advanced (and need we say
expensive) measurement and analysis tools for
the design team to use.

The result? The HR624 Studio Monitors are

extremely accurate and versatile, loaded with
unique controls that allow you to fine-tune the
sound to match your individual environment
precisely. You’re gonna love these!

What are they? The Advantages...

The HR624 Studio Monitors are high-resolution,

two-way, bi-amplified, active monitors employing
a 6th-order Butterworth system with a built-in
rear-firing mass-loaded passive radiator. Whew!
There are many benefits to integrating an active

Tweeter

Woofer

Passive Radiator

"H" Brace

Power Amplifier/
Crossover Assembly

Figure 1.  HR624 Cutaway side view

Lend Me Your Ears

Exposure to extremely high noise
levels may cause permanent hearing
loss. Individuals vary considerably in
susceptibility to noise-induced hear-
ing 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 Ad-
ministration (OSHA) has specified the permissible
noise level exposures shown in this chart.

According to OSHA, any exposure in excess of

these permissible limits could result in some hear-
ing loss. To ensure against potentially dangerous
exposure to high sound-pressure levels, it is recom-
mended that all persons exposed to equipment
capable of producing these levels use hearing pro-
tectors while this unit is in operation. Ear plugs or
protectors in the ear canals or over the ears must
be worn when operating this amplification system
in order to prevent a permanent hearing loss if
exposure is in excess of the limits set forth here.

Duration Per Day

Sound Level dBA,

Typical

  In Hours

  Slow Response

Example

8

90

Duo in small club

6

92

4

95

Subway Train

3

97

2

100

Very loud classical music

 1.5

102

1

105

Patrice screaming at Ron about deadlines

0.5

110

 0.25 or less

115

Loudest parts at a rock concert

The HR624

can produce a

maximum SPL of

115 dB @ 1m

Summary of Contents for HR624

Page 1: ...HR624 HIGH RESOLUTION ACTIVE STUDIO MONITOR OWNER S MANUAL...

Page 2: ...ert 15 Grounding or Polarization Precautions should be taken so that the grounding or polarization means of this Mackie product is not defeated 16 Power Protection Unplug this Mackie product during li...

Page 3: ...accurate and versatile loaded with unique controls that allow you to fine tune the sound to match your individual environment precisely You re gonna love these What are they The Advantages TheHR624Stu...

Page 4: ...ntil you read about them later on in this manual so you really know what they do For now just leave them at the factory default set exponential waveguide which results in wide controlled dispersion of...

Page 5: ...0Hz LOW CUT 49Hz NORMAL B C RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING TOREDUCETHERISKOFFIREORELECTRICSHOCK DONOT EXPOSETHISEQUIPMENTTORAINORMOISTURE DONOTREMOVECOVER NOUSERSERVICEABLEPARTSINSIDE REFE...

Page 6: ...est bass response in a room that s optimized for bass reproduction A lot of factors can conspire to thwart the HR624s extended low frequency including room shape room volume and acoustical treatment T...

Page 7: ...channel material should have the option to use pm3 THX pm3 Certifi cation is ideal for DVD mastering sweetening and mixing and is also perfect for facilities do ing work in broadcast music or multi me...

Page 8: ...use the HR624s free standing away from walls and corners whole space set the ACOUSTIC SPACE switch to the C position NORMAL This is where you connect your signal to the monitor and make adjustments t...

Page 9: ...enhancing low frequency output use the 49Hz NORMAL position The LOW FREQ switch affects the low frequency content of your mix Remember how things work in reverse so removing the deep bass content on...

Page 10: ...r amplifiers are live and operate normally The front panel mute switch must also be OUT When it s in the AUTO ON position the amplifiers turn on and off depending on the presence or absence of an inpu...

Page 11: ...e OUT position applying AC power activates the muting circuit for about four seconds while the power supply and internal circuitry stabilize then the HR624 unmutes and is ready to go Passive Radiator...

Page 12: ...the POWER MODE switch is ON the front panel mute switch turns the HR624 on or returns it to STANDBY mode as indicated by the power LED the power LED goes off when muted If the POWER MODE switch is in...

Page 13: ...hould use high quality shielded cable to connect the signal source to the SIGNAL INPUT jack on the HR624 Foil shielded cables such as Belden 8451 8761 or 9501 are commonly used for studio wiring Micro...

Page 14: ...evice on the same AC circuit as the monitor Dimmers cause buzzing noises Use an AC line filter or plug the monitor into a different AC circuit SERVICE INFO Details concerning Warranty Service are spel...

Page 15: ...U S versions of our monitors is available only from our factory located in sunny Woodinville Washington Service for monitors living outside the United States can be obtained through local dealers or d...

Page 16: ...l Protection Amplifier Shut Down Auto Reset Specifications Enclosure Materials and Construction 5 8 inch 16mm thick MDF construction with 1 inch 25 4mm thick MDF front panel with radiused edges to min...

Page 17: ...e Input Voltage and Power Power consumption Standby mode 12 watts Quiescent idle 20 watts Musical Program Loud mix 105 watts Both channels driven into resistive loading to 1 clipping LF 86W 4 HF 38W 8...

Page 18: ...put was pro vided from various and sundry interested parties including ourcolorfullyconvolutedcommunica tions connoisseur and Master Geek Ron Koliha and Linn Compton proofreader extraordinaire Finally...

Page 19: ...50 100 200 500 1k 2k 5k 10k Hz HR624 High Frequency EQ Filter Response dBu 40 10 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 2 4 6 8 20 20k 50 100 200 500 1k 2k 5k 10k Hz HR624 Low Frequen...

Page 20: ...rope Asia Central South America 425 487 4333 Middle East Africa 31 20 654 4000 Fax 425 487 4337 www mackie com E mail sales mackie com Some of the people at our factory who helped design build sell an...

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