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13

Thermal Protect

All amplifiers produce heat. The HR624 is

designed to be efficient both electrically and
thermally.
• If for some reason the heatsinks get too hot,

a thermal switch activates, placing the
HR624 into Standby mode (indicated when
the green 

POWER

 LED 

 turns off).

• Should this happen, make sure that airflow

to the rear of the cabinet is not restricted.

• When the heatsinks cool down to a safe

temperature, the switch resets and normal
operation resumes.

Integrated Magnetic Shielding

The HR624 Studio Monitor contains drivers

with large magnet structures. The drivers’ mag-
nets are shielded to help prevent the magnetic
field from radiating out into the environment
and playing havoc with computer monitors or
TV screens. Unshielded speakers can cause
distortion in both the shape and color of the
picture if placed too close to a CRT (cathode
ray tube). If you have a particularly sensitive
computer monitor or TV screen, it may be nec-
essary to move the speakers a few inches away.

Input Signal Wiring

You should 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.

• Microphone cables work well.

• The better the shield, the better the

immunity from externally induced noise
(like EMI and RFI). Route the cable away
from AC power cords and outlets. These are
common sources for hum in an audio
signal. Wall warts and line lumps are
especially insidious hum inducers!

You can purchase quality cables from your
Mackie dealer.

• In certain home theater applications, it

may be necessary to connect the speaker
outputs from a stereo receiver to the inputs
of the HR624s, if the receiver doesn’t have
preamp outputs or other line-level output
connections.

CAUTION:

 Do not attempt

to connect a speaker output
directly to the input of the
HR624! Speaker levels are
much higher than line levels

and can damage the input circuitry in the HR624.

You can, however, insert a speaker-level to

line-level signal attenuator between the
receiver’s speaker output and the HR624’s input.
Your Mackie dealer may be able to help you find
one, or you can build your own. Contact our tech
support department for more information.

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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