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 clair avec point de flche l'intrieur d'un triangle quilatral est utilis pour alerter l'utilisateur de la prsence l'intrieur du coffret de "voltage dangereux" non isol d'ampleur suffisante pour constituer un risque d'lctrocution. 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 l'intrieur d'un triangle quilatral est employ pour alerter les utilisateurs de la prsence d'instructions importantes pour le fonctionnement et l'entretien (service) dans le livret d'instruction accompagnant l'appareil.
Duration, per day in hours 2 1.5 1
Sound Level dBA, Slow Response 105
Typical Example Duo in small club Subway Train Very loud classical music Matt screaming at Troy about deadlines Loudest parts at a rock concert

0.0.25 or less 115

WARNING To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.
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.

INTRODUCTION

Thank you for choosing the Mackie HR624 MK2 Studio Monitors. We began producing the original HR624 Studio Monitors in 2001, the baby brother to our flagship HR824 Studio Monitors. The HR624 MK2s have been redesigned with modern components for improved accuracy and an extended low-frequency response.

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 frequency responses are individually hand-trimmed to compensate for typical manufacturing tolerances between the drivers and produce a smooth frequency response from 45 Hz to 20 kHz. The connecting wires between the amplifier outputs and the drivers are kept to an absolute minimum, so the damping factor of the amplifier isnt compromised by the resistance of long speaker cables. The acoustic sum of the outputs from the two drivers are optimized electronically, as well as physically, so the amplitude response is unity and the phase difference is minimal. In short, all the complex interconnected components in the system are designed to work in harmony with each other to produce the best possible sound.

Owners Manual

Investments in Excellence.
When we decided it was time to update the HR624s, we turned to our expert loudspeaker and transducer design engineering team at EAW to determine how to make an already excellent studio monitor even better. The first thing they noticed was that the front baffle could be redesigned with a rounder aluminum construction to further reduce edge diffraction for improved imaging. The volume of the cabinet was increased slightly to improve the low-frequency response. The amplifiers have been adjusted with all new voicing to match the new cabinets. However, the amplifiers design is fundamentally the same and has a very similar characteristic to the original model. If you are upgrading from the original HR624s, you wont have to relearn the sound. The MK2s still deliver the clarity, ultra-linear frequency response, and broad stereo imaging of the originals. An elegant piano-black gloss finish emphasizes that these studio monitors are in a class by themselves, pleasing to the most discerning eye as well as the most discerning ear. The result? The HR624 MK2 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. Youre gonna love these!

The Transducers.

The monitors feature a 6.7-inch high-precision, lowdistortion woofer and a 1-inch ferrofluid cooled titanium dome tweeter on the front, and a 6-inch x 9-inch elliptical flat piston passive radiator in the back. The high-frequency driver is mounted on a massive, acoustically non-resonant die-cast aluminum exponential waveguide, which results in wide, controlled dispersion of high-frequency sounds. The unique passive radiator design provides a smooth response down to 45 Hz an astounding accomplishment for a cabinet of this size! And since the radiator is producing most of the sound at the lowest frequencies, there is very little distortion from the woofer because its cone movement is minimal at those frequencies.

What are they? The Advantages.
The HR624 MK2 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 crossover, power amplifiers, and drivers into a single cabinet, and weve taken full advantage of these benefits in the design of the HR624 MK2. The crossover point is designed so that the high- and low-frequency drivers are fed only the frequencies they are best able to reproduce.

Tweeter

Passive Radiator Power Amplifier/ Crossover Assembly

Woofer

Figure 1. HR624 MK2 Cutaway side view

The Cabinet.

The cabinet is made of MDF with a high-gloss pianoblack finish. Internal bracing increases the strength and rigidity (stiffness) of the box. An open-cell adiabatic foam material fills the inside of the box to absorb internal reflections and dampen standing waves. Mounting hardware is installed on the bottom of the cabinet that fits the WB-60 OmniMount wall-mount bracket.

Power Amplifiers.

The low-frequency amplifier produces up to 100 watts continuous before clipping, while the high-frequency amplifier produces up to 40 watts continuous.

QUICK START

We realize that you cant wait to hook up your new Mackie HR624 MK2 High Resolution Studio Monitors and try them out. Nevertheless, please take the time to read this page NOW, and the rest can wait until youre good and ready. Make sure the Voltage Selector Switch [11] on the bottom of the cabinet is set to the correct voltage setting for your AC Mains supply. Each of the HR624 MK2 cabinets has its own built-in power amplifiers. Thats right, two amplifiers per speaker cabinet; one for the high-frequency tweeter and one for the low-frequency woofer. You should turn the INPUT SENSITIVITY [2] control on the back of the cabinet down (fully counterclockwise) before turning on the Studio Monitors for the first time. Also be sure to set the power switch [9] on the front panel to its standby position (out). This will prevent you from accidentally connecting a hot signal source to the monitors and getting a rude surprise. There are a number of other settings you can make on the back of the HR624 MK2, and you can look at the graphic instructions relating to each of them on the back of the cabinet (or wait until 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 settings (ACOUSTIC SPACE = WHOLE; LOW FREQ = 49Hz; HIGH FREQ = 0), except for the POWER MODE [6] switch. Be sure it is set to the STANDBY position.

1. Connect the line-level monitor signal from your mixer, preamp, or other signal source to the SIGNAL INPUT [1] jack on the HR624 MK2 Studio Monitor (14-inch PHONE, XLR, or RCA). 2. Connect the supplied AC power cord to the IEC socket [7] on the back of the monitor. Plug the other end into an AC outlet properly configured with the voltage corresponding to the Voltage Selector Switch [11] setting. 3. Set the POWER MODE [6] switch on the rear panel to the ON position. With the front panel power switch [9] out, the power amplifier is in Standby mode. 4. Start your signal source (tape deck, CD, DAW, or whatever), but leave the master volume control on your mixer or preamp down. 5. Push in the power switch [9] on the front of the HR624 MK2. The power ring [10] around the switch will illuminate. 6. Slowly turn up the INPUT SENSITIVITY [2] control on the back of the monitor to its fully clockwise position (NORMAL). 7. Adjust the master volume on your mixer to a comfortably loud listening level. Enjoy the silky smooth highs and authoritative, commanding lows of the HR624 MK2. Then read the rest of this manual.
AN EXTREMELY IMPORTANT NOTE ON HR624 MK2 BASS RESPONSE AND YOUR CONTROL ROOM.
Your new HR624 MK2s achieve their best bass response in a room thats optimized for bass reproduction. A lot of factors can conspire to thwart the HR624 MK2s extended low frequency including room shape, room volume and a coustical treatment. This is not a cop-out or an apology. Its plain old physics in action. Luckily weve armed you with some compensating controls that you can use to optimize the frequency response of the speakers in your particular room. Consider the following:
The ACOUSTIC SPACE switch must be set correctly.
When you put your HR624 MK2s in a corner or up against walls, their bass characteristics change. Adjust the ACOUSTIC SPACE [3] switch setting accordingly to avoid muddy or exaggerated low frequency response.

QUARTER SPACE CONSOLE

HALF SPACE CONSOLE

www.omnimount.com/pro

Finally, keep an open mind about improving your rooms acoustics and bass-handling ability.
Nobody likes to buy a new set of monitor speakers and then be told that they should spend extra bucks on bass traps or a remodeling job. But the simple fact is, standard rooms, i.e., rectangular rooms in conventional business or residential structures, are rarely if ever conducive to optimal low bass reproduction without some modifications. Luckily, there are plenty of options short of building a new control room, many of which are covered in this manual.
When the monitor is operated at high sound pressure levels, a fair bit of heat can be generated by the internal power amplifiers. These internal amplifiers are part of the rear panel electronics assembly. To ensure adequate ventilation, the rear of the monitor should be placed at least three inches away from the wall.
Additional Tidbits of Wisdom
When you shut down your equipment, turn off the HR624 MK2 studio monitors first to prevent thumps and other noises generated by any upstream equipment from coming out the speakers. When powering up, turn on the monitors last. Save the shipping box! You may need it someday, and you dont want to have to pay for another one. Save your sales receipt in a safe place. Also record all HR624 MK2 serial numbers in the space provided on the next page, along with where and when you bought them.
Note: The Mackie logo can be rotated 90 so that it is oriented correctly when placing the speakers on their sides. Gently pull out on the Mackie emblem, rotate it, and push it back into place.
A Few Words About THX pm3 Certification
Nearly two decades ago, George Lucas turned a passion for great sound into the worlds most accepted and trusted solution for achieving it. The standard was named THX (for Tomlinson Holman, who developed the THX Sound System when he was the research and technical director at Lucasfilm Ltd. in the early 80s), and today, with hundreds of thousands of home theater customers and more than 3000 THX Certified movie theaters enjoying its benefits, the THX name has become nothing short of legendary. Simply put: when it comes to premium sound, no other name so closely defines quality for millions of movie-goers and home theater enthusiasts alike. Today, a new landscape is emerging. A landscape comprised of hundreds of small, professional multichannel facilities, whose need for differentiation, expert technical and marketing support, and a true, multichannel standard is becoming a competitive fact of life. Again, THX has a singular solution and this time its called THX pm3 Certification. All facilities involved with mixing and/or monitoring of multi-channel material should have the option to use pm3. THX pm3 Certification is ideal for DVD mastering, sweetening, and mixing; and is also perfect for facilities doing work in broadcast, music, or multi-media applications.

Contents

IMPORTANT SAFETY INSTRUCTIONS.2 INTRODUCTION.. 3

QUICK START... 4

REAR PANEL DESCRIPTION..8
1. SIGNAL INPUTS... 8 2. INPUT SENSITIVITY.. 8 3. ACOUSTIC SPACE... 8 4. LOW FREQ FILTER.. 9 5. HIGH FREQ FILTER... 9 6. POWER MODE...10 7. Mains Input...10 8. Passive Radiator..11
FRONT PANEL DESCRIPTION..12
9. Power Switch..12 10. Power Ring and Overload Indicator..12

PROTECTION CIRCUITS..12

Overload Protect..12 Thermal Protect... 13 Integrated Magnetic Shielding.. 13 Input Signal Wiring.. 13
HR624 MK2 THX pm3 Certification
When we submitted the HR624 MK2s for THX pm3 Certification, they passed on the first try with no modifications! Anyone seeking THX Certification for their studio, or striving to maintain THX standards, can use the HR624 MK2s and rest assured that their facility is in full compliance.
CARE AND CLEANING..13 SERVICE INFO..14
Troubleshooting...14 Repair...15
TECHNICAL INFORMATION.. 16
HR624 MK2 Specifications..16 Graphs...17 HR624 MK2 Block Diagram...18
Please write the serial number for your studio monitor here (all studio monitors if you have more than one) for uture reference f (i.e., insurance claims, tech support, return authorization, etc.): Monitor 3 Monitor 1 Monitor 2
Purchased at:___________________________________ Date of Purchase:_____________
Part No. SW0592 Rev. F 01/11 2007-2011 LOUD Technologies Inc. All Rights Reserved.

REAR PANEL DESCRIPTION

This is where you connect your signal to the monitor, and make adjustments to the frequency response of the speakers to match the monitors location and your rooms environment. For THX applications, the rear panel switches and controls should be set to the THX positions as indicated in this section.

2. INPUT SENSITIVITY

QUARTER WHOLE (NORMAL)

THX = NORMAL

1. SIGNAL INPUTS
The location of the signal input jacks makes the connectors exit down and not straight out the back of the enclosure. This flush-mount design allows you to place the monitor right up against the wall if desired. The XLR female, TRS female (balanced), and RCA female (unbalanced) input connectors are provided for user convenience. Dont connect more than one source to the jacks. Unbalanced TS (tip-sleeve) lines can be accommodated via the TRS jack. Make sure the cable terminates with a TS plug (like a guitar plug), or if its a TRS plug (such as a headphone plug), make sure the ring is tied to the sleeve and that the plug is fully inserted into the jack. The XLR and TRS input connectors accept balanced or unbalanced signals. The connectors are wired as follows (per the AES/IEC standard): XLR TRS RCA Hot (+) Cold () Shield (Ground) Pin 2 Pin 3 Pin 1 Tip Ring Shield Tip Shield

The HR624 MK2 expects a line-level signal at its input connectors. The reference sensitivity is 7.5 dBu=100 dB SPL at one meter (39 inches) with the INPUT SENSITIVITY control set to its NORMAL position (in other words, wide open). The HR624 MK2 is designed to operate with a +4 dBu signal when the INPUT SENSITIVITY control is in the NORMAL position. Refer to the QUICK START section on page 4 for the level-setting procedure.

3. ACOUSTIC SPACE

THX = WHOLE (NORMAL) This is a three-way switch that djusts the low-frequency a response of the monitors to compensate for their placement in the room. See page 5 for an overview of the rear panel. If you place the HR624 MK2 monitors against a wall (half space [3B]), set the ACOUSTIC SPACE switch to the B position. This activates a shelving filter to reduce the low-frequency output by 2 dB to compensate for the half-space placement. If you place the monitors into the corners of your room (quarter space [3A]), the low-frequency output approximately doubles from what it is in half space. Set the ACOUSTIC SPACE switch to the A position to reduce the low-frequency output by 4 dB to compensate for the quarter-space placement. If you use the HR624 MK2s free-standing, away from walls and corners (whole space [3C]), set the ACOUSTIC SPACE switch to the C position (NORMAL).
The HR624 MK2s can be used with a home receiver even if the receiver lacks a preamp output by using a speaker-level to line-level signal attenuator. (See page 13 for more information.)

4. LOW FREQ FILTER

Removing the low-frequency content also allows you to raise the overall output level somewhat. Lowfrequency information requires the largest amount of an amplifiers output, so restricting the low-frequency STANDBY content allows raising the mid-frequency level ON AUTO somewhat. If your client insists on mixing LOUD, this ON may POWER be a workable strategy.

THX = 80Hz 10dB

5. HIGH FREQ FILTER

80Hz 49Hz

The LOW FREQ FILTER switch inserts a low-frequency rolloff into the response curve.

OFF NORMAL

For some applications, the low-frequency output of (NORMAL) LOW CUT (NORMAL) AUTO HALF ON the HR624 MK2 may impair your ability to make mix INPUT ACOUSTIC LOW HIGH POWER judgements. SENSITIVITY SPACE FREQ FILTER FREQ FILTER MODE For THX applications, use the 80Hz setting. THX = 0 dB For non-THX applications where a sub-woofer isnt enhancing low-frequency output use the 49Hz The HIGH FREQ FILTER switch tailors the overall (NORMAL) position. high-frequency response by 2 dB beginning at 10kHz. Leave this switch in the 0 (NORMAL) position unless: The LOW FREQ switch affects the low-frequency content of your mix. Remember how things work in to subtly HALF reverse, so removing the deep bass QUARTER SPACEon playback SPACE You want WHOLE SPACE brighten or darken the sound of the content speakers. CONSOLE CONSOLE may actually increase it in the final mix. CONSOLE Perhaps you have hearing loss caused by too many You can use the LOW FREQ switchs 80Hz position to nights in front of a double Marshall stack. simulate a smaller loudspeaker, especially one with A B You just likeCto mix on the bright side or dull side. limited low-frequency capability (like a certain popular ACOUSTIC If your 2-way nearfield monitor). You may need to do this if a SPACE APPLICATIONSmixes consistently sound dull or dark when you listen elsewhere, this usually indicates that your small speaker is the eventual destination of your mix, 0 monitors 02are too bright, relative to your normal hearing. 0 or perhaps just to see how your mix sounds on a clock 4 A bit less2high-frequency energy usually fixes this, and radio. you can force the mix in this direction by reducing the LOW FREQ ACOUSTIC SPACE HIGH FREQ high-frequency output of the monitors by using the 2 dB position of the switch.

Passive Radiator

FRONT PANEL DESCRIPTION

9. Power Switch

QUARTER 10dB Use this switch to turnWHOLE (NORMAL) HR624 MK2 from on or off the A C the front. It works with the POWER MODE [6] switch on the rear panel in the following way: 0 OFF 80Hz 49Hz If theNORMAL MODE B POWER switch on the rearCUT (NORMAL) 2dB (NORMAL)+2dB panel is set LOW HALF to STANDBY, the front panel power [9] switch has no INPUT HIGH effect. The powerACOUSTIC remains off. LOW [10] ring SENSITIVITY SPACE FREQ FILTER FREQ FILTER If the POWER MODE switch is ON, the front panel power switch turns the HR624 MK2 on or returns it to STANDBY mode, as indicated by the power ring. If the POWER MODE switch is in the AUTO ON position, the front panel power switch turns the HR624 MK2 on, even when there is no signal present. If there is no signal after about two minutes, the auto-off function is activated and the amplifiers go into Standby mode, indicated when the power ring goes off. STANDBY AUTO ON ON
10. Power Ring and Overload Indicator
The power ring around the power switch illuminates when the power amplifiers are on, and turns off when the amplifiers are in Standby mode or off. The power ring turns red when the overload protection circuit has been triggered. Occasional blinking of the overload indicator means that the loudest transients are reaching the maximum drive capability of the amplifiers. This is okay, although distortion may be audible. Frequent or continuous blinking of the overload indicator means that you have exceeded the maximum drive allowed for the speakers. The amplifiers are clipping, and the overload protection circuit has taken over, reducing the input level. You should reduce the level from your signal source until the overload indicator blinks occasionally or not at all.

Overload Protect

If you see the overload indicator [10] blinking more than just occasionally, its an indication that you should reduce the signal level coming from your mixer or other signal source. The blinking overload indicator means the driver thermal overload protection has activated a compressor. This reduces the input level to the amplifiers. The compressor was designed to protect the speakers and its action is highly audible. If a client insists on listening to the monitors at a very high volume, you may find that the overload indicator lights frequently. Since the majority of the power requirement in any monitor are the low frequencies, selectively reducing the low end can provide a little more headroom and volume for the monitors. Change the LOW FREQ FILTER [4] switch to 80Hz if necessary, to reduce the bass response. This may allow the HR624 MK2s to play just enough louder to satisfy the client and to eliminate most of the amplifier clipping.

PROTECTION CIRCUITS

There are a number of protection mechanisms designed into the HR624 MK2 to safeguard the loudspeakers from inadvertent damage. CAUTION: The protection circuits are designed to prevent damage to the loudspeakers under reasonable and sensible conditions. Should you choose to ignore the warning signs (i.e., frequent overload indications, excessive distortion), you can still damage the speakers in the HR624 MK2 by overdriving them. Such damage is beyond the scope of the warranty.

Thermal Protect

All amplifiers produce heat. The HR624 MK2 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 MK2 into Standby mode (indicated when the power ring [10] 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.

CARE AND CLEANING

Remove the protective plastic film that encases the cabinet. Note: You may leave the protective plastic film on the cabinet if you wish, or you can remove all but the side that will be in contact with the surface it is sitting on to protect the finish. Also, you should save the protective plastic film to reapply to the cabinet in case you need to move it to another location (or return for servicing). The piano-black finish on the HR624 MK2 cabinets is exceedingly beautiful, yet extremely delicate. Clean the outside of the cabinet with an optical grade non-scratch cloth, such as you would use to clean eyeglasses, CDs, or DVDs.
Integrated Magnetic Shielding
The HR624 MK2 Studio Monitor contains drivers with large magnet structures. The drivers magnets 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 necessary 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 [1] on the HR624 MK2. 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 HR624 MK2s, if the receiver doesnt 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 MK2! Speaker levels are much higher than line levels and can damage the input circuitry in the HR624 MK2. You can, however, insert a speaker-level to line-level signal attenuator between the receivers speaker output and the HR624 MK2s input. Your Mackie dealer may be able to help you find one, or you can build your own. Owners Manual

Transducers

Low-frequency driver: Diameter: 6.7 inches (170mm) Sensitivity (2.83V, 1 m): 89 dB SPL Nominal Impedance: 4 Voice Coil Diameter: 1.25 inches (32mm) Power Handling (Long Term/Program): 50/150 watts Frequency Range: 45 Hz to 6 kHz Frame: Die-cast magnesium Magnet: Ferrite Fully shielded: Ferrite opposing magnet High-frequency driver: Sensitivity (2.83V, 1m): 91 dB SPL
Nominal Impedance: 6 Power Handling (Long Term/Program): 20/50 watts Frequency Range: 1.6 kHz to 22 kHz Diaphragm/Suspension: Titanium with polymer suspension Voice Coil Diameter: 1.0 inch (25.4mm) Magnet: Neodymium Bucking Magnet: Ferrite opposing magnet Passive Radiator: 6-inch x 9-inch (152mm x 228mm) mass-loaded elliptical flat piston with variable thickness filleted edge rubber surround.

System Specifications

Input Type: Balanced Differential (XLR and 1/4" TRS) Unbalanced (RCA) Input Impedance: 20 k Balanced 10 k Unbalanced Input Protection: RFI and Level Protected Maximum Input Level: +20 dBu Low Frequency Filter: 80 Hz, 2nd Order, Butterworth HF Equalization: Shelving 2 dB @ 10 kHz Acoustic Space: A position: 4 dB @ 50 Hz, shelving B position: 2 dB @ 50 Hz, shelving C position: Flat Compressor: Independent high and low frequency overload detection Enclosure Alignment: 6th Order Over Excursion Prevention: 2nd Order High-Pass Filter Low Line Voltage Shut Down: 60% of Nominal Line Thermal Protection: Amplifier Shut-Down, Auto Reset Muting: 5 seconds at turn-on Signal Sense Threshold: 74 dBu (0.155 mV) Driver Protection: Independent LF and HF Detection Overall Compression

Crossover Section

Crossover Type: Modified Linkwitz-Riley, 24 dB/octave @ 3 kHz

Acoustic Section

Free-Field Frequency Response: 1.5 dB, 49 Hz to 20 kHz Lower cutoff frequency: Upper cutoff frequency: 3 dB @ 45 Hz 3 dB @ 22 kHz 100 dB SPL @ 1m 115 dB SPL @ 1m 106 dB SPL @ 1m

Graphs

HR624 Acoustic Space Filter Response
+10 +9 +8 +7 +6 +5 +4 +3 +2 +1
Sound Pressure Level at 1 meter, 7.5 dBu into balanced input: Maximum peak SPL per pair: Maximum short term SPL on axis, half space 80 Hz to 2.5 kHz:

dBu -0

-1 -2 -3 -4 -5 -6 -7 -8 -9
Residual noise (maximum gain, 600 source, 20 Hz-20 kHz bandwidth): < 8 dB SPL @ 1m
Rated Line 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): 255 watts US: 120 VAC, 60 Hz Europe: 240 VAC, 50 Hz Korea (AC Power Selector at 240 V): 220 VAC, 60 Hz Japan (AC Power Selector at 120 V): 100 V, 50-60 Hz Rated Power (For UL-6500, CSA-E65-94, EN-60065): 130 watts

-10 20

HR624 High Frequency EQ Filter Response
-1 -2 -3 -4 -5 -6 -7 -8 -9 -10 20

Physical Properties

Height: Width: Depth Enclosure: Depth Overall: Internal Volume: Weight: 13.1 in/33.3 cm 8.6 in/21.9 cm 10.3 in/26.2 cm 12.6 in/31.9 cm 0.29 cubic feet (8.2 liters) 23.4 lb/10.6 kg
+10 +8 +6 +4 +2 -0 -2 -4 -6 -8 -10 -12
HR624 Low Frequency Filter Response
-14 -16 -18 -20 -22 -24 -26 -28 -30 -32 -34 -36 -38 -1k 2k 5k 10k 20k
LOUD Technologies is always striving to improve our products by incorporating new and improved materials, components and manufacturing methods. Therefore, we reserve the right to change these specifications at any time without notice.

8.6" (21.9 cm)

12.6" (31.9 cm)
HR624 MK2 WEIGHT 23.4 lb (10.6 kg) 13.1" (33.3 cm)

10.3" (26.2 cm)

HR624 MK2 Block Diagram
+15VDC POWER MODE SWITCH ON AUTO STANDBY THERMAL SWITCH LOW AC VOLTS SENSE POWER SWITCH (FRONT PANEL) POWER RING (POWER = WHITE OVERLOAD = RED)

Vref SIGNAL SENSE

HIGH = MUTE OFF LOW = MUTE ON

MUTE ON/OFF CONTROL

UNBALANCED LINE INPUT
HF OUT HIGH FREQ. +2 dB dB
HF TRANSDUCER THERMAL MODELER CROSSOVER COMPRESSOR
HI-FREQUENCY POWER AMPLIFIER HI-FREQ LO-FREQ

HF OUT

HI-FREQUENCY DRIVER

BALANCED LINE INPUTS

SENSITIVITY

SENSITIVE

LF OUT

CALLOUS

LF TRANSDUCER THERMAL MODELER

WHOLE HALF QUARTER

49Hz (NORMAL) 80Hz
LO-FREQUENCY POWER AMPLIFIER

LO-FREQUENCY DRIVER

OUTER SPACE
MOTION DETECTOR FUSE 120V 240V + FUSE TOROIDAL POWER TRANSFORMER HI VDC
MUTE BASS CONTROL SERVO LOOP

SENSE RESISTOR

MACKIE HR624 MK2 BLOCK DIAGRAM (030507)

+ LO VDC

The following are trademarks or registered trademarks of LOUD Technologies Inc.: The Mackie logo, HR Series, Zero Edge Baffle, and the Running Man. THX and pm3 are trademarks of THX Ltd. which may be registered in some jurisdictions. All rights reserved. Lucasfilm is a trademark of Lucasfilm Ltd. This manual also contains names and marks of other companies which belong to those respective companies, and are hereby acknowledged. HR624 MK2 design protected under the following patent: DES. 387,351 2007-2011 LOUD Technologies Inc. All Rights Reserved.

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 (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.
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

HR Series

The HR624 studio monitors are high-resolution, twoway, bi-amplified, active monitors employing a 6th-order Butterworth system with a built-in rear-firing mass-loaded passive radiator. They feature a 1-inch aluminum-alloy high-frequency transducer, a high-precision 6.7-inch diecast magnesium frame low-frequency transducer, and a 6-inch x 9-inch elliptical flat piston passive radiator in the back. The system is composed of a single, compact cabinet with built-in control and amplifier electronics.
Active 2-Way Studio Monitor
The high-frequency driver is mounted on a massive,
acoustically non-resonant die-cast zinc exponential waveguide, which results in wide, controlled dispersion for high-frequency sounds. The unique passive radiator design provides smooth response down to 52 Hz.

Features

Flat frequency response (1.5 dB, 52 Hz to 20 kHz) 1" ferro-fluid cooled aluminum alloy dome tweeter 6.7" mineral-filled polypropylene cone woofer Proprietary, acoustically non-resonant high-frequency
exponential waveguide 6" x 9" elliptical passive radiator for enhanced bass performance 40 watt HF and 100 watt LF power amplifiers Servo-loop architecture for improved low-frequency overload detection Independent high and low frequency overload detection High-strength cabinet constructed with 5/8" MDF composite and 1" front board with radiused edges Internal H-brace for extra rigidity High-density adiabatic foam absorbs internal reflections Full magnetic shielding Balanced XLR and 1/4" TRS, and unbalanced RCA input connectors, downward facing Modified Linkwitz-Riley 24 dB/octave crossover Recessed adjustable sensitivity control Acoustic Space switch for selecting whole space, half space, or quarter space placement Low-Frequency switch for bandwidth limiting the low-frequency response High-Frequency switch boosts or cuts high frequencies Power Mode switch includes AUTO mode Front panel mute switch with indicating LED Front panel overload indicating LED
The amplifiers found in the HR624 cabinet are an
example of application-specific amplifier design that can be exercised when designing active speaker systems. The low-frequency amplifier is rated at 100 watts rms continuous output, and the high-frequency amplifier is rated at 40 watts rms continuous.
The input panel on the back accepts a line-level input
with balanced 1/4" TRS, XLR, and unbalanced RCA connectors. The connectors face downward so the monitor can be placed flush against a wall. There is an input sensitivity control to trim the gain from input to output and adjust for various input levels. An acoustic space switch adjusts the bass response to compensate for corner (quarter space) or wall (half space) placement. A low-frequency switch selects a high-pass cutoff frequency of 80 Hz, and a high-frequency switch provides either 2 dB of boost or cut above 10 kHz. The power mode switch can be used to turn the monitor on and off, a function that is duplicated with the front panel switch, or to put the monitor into auto mode, where the amplifiers revert to standby when no signal is present for several minutes. The instant a signal appears at the input, the amplifiers seamlessly come back to life and produce sound. The cabinet is constructed using 5/8-inch (16 mm) thick MDF with a 1-inch (25 mm) thick MDF front panel. An internal H-brace provides additional cabinet stiffness, and open cell adiabatic "foam fill" acoustic damping material absorbs internal reflections.
HR824 Active 2-Way Studio Monitor, HR626 Active 2-Way Studio Monitor, HRS120 Active Subwoofer, HRS150 Active Subwoofer
R E LA TE D PR O D U C TS

Applications

Near-field studio monitors Home Theater surround sound

SPEAKER

Acoustic Performance Free Field Frequency Response: Lower Cutoff Frequency: Upper Cutoff Frequency: Sound Pressure Level @ 1 meter, 7.5 dBu into Balanced Input: Max SPL Peak Per Pair:
Line Input Power US: Europe: AC Connector: Power Consumption:
HR624 Technical Specifications
52 Hz20 kHz, 1.5 dB 3 dB @ 49 Hz 3 dB @ 22 Hz 100 dB SPL @ 1m 115 dB SPL @ 1m 120 VAC, 60 Hz 240 VAC, 50 Hz 2-pin IEC 250 VAC, 16 A male 105 watts with music, loud mix 20 watts quiescent (idle) 12 watts in standby mode
Transducers Low Frequency: 6.7" (170 mm) with die-cast magnesium frame, mineral-filled polypropylene cone High Frequency: 1" (25 mm) viscous edge-damped aluminum alloy dome with ferrofluid cooled voice coil Passive Radiator: 6" x 9" (152 mm x 228 mm) mass-loaded elliptical flat piston composed of aluminum composite with variable thickness filleted edge rubber surround Amplifiers Low Frequency Power: 100 watts, 4 load High Frequency Power: 40 watts, 8 load Slew Rate: >15V/s Distortion (THD, SMPTE IMD, DIM 100): <0.035% Signal-to-Noise Ratio: Low-frequency amplifier: >101 dB referenced to 100 watts into 4 High-frequency amplifier: >93 dB reference to 40 watts into 8 Type: Monolithic IC, Class AB Electronic Crossover Crossover Type: Modified Linkwitz-Riley, 24 dB/octave Crossover Frequency: 3000 Hz Sensitivity: 0 dBu nominal Input Impedance: 20 k, balanced bridging Compressor: Independent high and low frequency overload detection Equalization Acoustic Space EQ: Low Frequency EQ: High Frequency EQ: Flat, 2 dB, 4 dB @ 50Hz, shelving 3 dB @ 80 Hz 2nd-order Butterworth high-pass filter 2 dB @ 10 kHz, shelving

Physical Enclosure:

5/8" (16 mm) thick MDF with 1" (25 mm) MDF front panel, internal H-brace Damping: Adiabatic foam Waveguide: Cast zinc Dimensions (HxWxD): 13.00" x 8.25" x 12.50" (330 mm x 210 mm x 318 mm) Weight: 25.1 lbs (11.4 kg)

HR624 Rear Panel

HIGH RESOLUTION STUDIO MONITOR
ACOUSTIC SPACE APPLICATIONS

QUARTER SPACE HALF SPACE

CONSOLE
SPEAKERS IN CORNERS SPEAKERS AGAINST WALL

WHOLE SPACE

SPEAKERS AWAY FROM WALLS

LOW CUT

0dB 2dB 4dB

20 100Hz

LOW FREQ
USE 80Hz TO EMULATE SMALL SPEAKER USE 49Hz FOR NORMAL LOW FREQ PERFORMANCE

ACOUSTIC SPACE

ROOM COMPENSATION

HIGH FREQ

0dB (START HERE) GUARANTEED FLAT USE FOR MOST APPLICATIONS +2dB: USE IF YOUR MIXES TRANSLATE BRIGHT 2dB: USE IF YOUR MIXES TRANSLATE DULL

FREE FIELD ACOUSTIC RESPONSE

49Hz 3dB

+1.5dB 52Hz 20kHz

22 kHz 3dB

QUARTER

WHOLE (NORMAL)

NORMAL

(NORMAL)

+2dB STANDBY

AUTO ON

INPUT SENSITIVITY

LOW FREQ FILTER

HIGH FREQ FILTER

POWER MODE

INTERNAL BIAMPLIFICATION 100W L.F. / 40W H.F.
"MACKIE", "FR SERIES", AND THE "RUNNING MAN" FIGURE ARE REGISTERED TRADEMARKS OF MACKIE DESIGN INC.

CAUTION

RISK OF ELECTRIC SHOCK DO NOT OPEN
AVIS: RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.

WARNING:

SERIAL NUMBER
CONCEIVED AND DESIGNED BY MACKIE DESIGNS INC WOODINVILLE WA USA 2001 MACKIE DESIGNS INC. ALL RIGHTS RESERVED
SIGNAL INPUTS BAL /UNBAL PHONE XLR RCA
MAINS INPUT ~120VAC/ ~220-240VAC 50-60 Hz 130W

www.mackie.com

16220 Wood-Red Road NE, Woodinville, WA 98072 USA 800.898.3211, fax 425.487.4337, sales@mackie.com
UK +44.1268.570.808, fax +44.1268.570.809, uk@mackie.com
LOUD Technologies continually engages in research related to product improvement. New material, production methods, and design refinements are introduced into existing products without notice as a routine expression of that philosophy. For this reason, any current LOUD Technologies product may differ in some respect from its published description, but will always equal or exceed the original design specifications unless otherwise stated. 1999-2004 LOUD Technologies Inc. All rights reserved. Mackie and the "Running Man" figure are registered trademarks of LOUD Technologies Inc. Part No. 0004810 Rev B 09/04