Mackie Headphones MR5 User Manual

MR5mk3, MR6mk3, MR8mk3  
Powered Studio Monitors  
O W N E R ’ S M A N U A L  
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Contents  
MRmk3 Features  
Music-centric voicing perfect for modern mixing,  
monitoring and multimedia applications  
Enhanced waveguide system delivers unmatched  
clarity and openness  
Minimized reflections and diffractions for wider  
sweet spot  
Seamless transition from high to low frequencies  
for a crystal clear mix image  
Perfectly matched amps and drivers for optimized  
performance  
50 watts of Class A/B amplification [MR5mk3]  
65 watts of Class A/B amplification [MR6mk3]  
85 watts of Class A/B amplification [MR8mk3]  
• 5.25" polypropylene woofer [MR5mk3]  
6.5" polypropylene woofer [MR6mk3]  
8" polypropylene woofer [MR8mk3]  
High output with controlled low-frequency  
performance  
1" silk-dome tweeter  
Superior transient response great for snares  
and other fast-transient sources  
Flexible inputs for simple connection to almost any  
audio source  
Customizable frequency control for your studio space  
Two levels of bass boost  
Boost/cut control over highs  
Custom-tuned rear ports for smooth, even bass  
extension  
Rugged all-wood cabinet design built to last  
Acoustically optimized with sound-tightening  
acoustic absorption material  
Add the companion MR10Smk3 studio subwoofer  
for powerful, deep extended bass  
Please write your serial number here for future  
reference (i.e., insurance claims, tech support,  
return authorization, make dad proud, etc.)  
Purchased at:  
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Date of purchase:  
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Part No. SW0979 Rev. C 05/15  
©2015 LOUD Technologies Inc. All Rights Reserved.  
3
Owner’s Manual  
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Designed To Enhance Your Sonic  
Experience  
Introduction  
MRmk3 Series Powered Studio Monitors love music as  
much as you do. Subject to an intensive music-centric  
voicing process designed to connect you to the music,  
the compact and affordable MRmk3 monitors are  
specifically designed to enhance the mixing and  
monitoring experience in any home or project studio.  
The ability to reveal the character of your music  
is the number one reason to get professional studio  
monitors. MRmk3 monitors are packed with design  
features to enhance this experience. From the added  
punch and bass extension provided by the custom-  
tuned ports to the rugged all-wood cabinet packed with  
sound-tightening acoustic absorption material, you can  
be confident that MRmk3 monitors are revealing the  
full-range, natural character that your music deserves.  
Optimizing features include an enhanced waveguide  
system for a wider sweet spot and custom-tuned rear  
porting for smooth, extended bass response.  
Plus, MRmk3 monitors have customizable frequency  
controls so you can dial in the perfect sound for your  
space.  
As Versatile As Your Application  
All studio spaces are different. As such, having the  
right connection types and customizable control over  
your acoustics is necessary.  
Designed from start to finish for music, MRmk3  
monitors reveal the full range and natural character  
that your music deserves.  
That’s why MRmk3 monitors include acoustic controls  
for dialing in the specific sound needed for your space.  
Want more bass? Pump up the low end by up to 4 dB  
to feel the difference. Or, boost / cut the highs to get  
exactly the amount of sizzle and shimmer you desire.  
A Brief History Of Time...  
We have been designing and re-designing studio  
monitors for over 15 years. Our talented engineering  
team has now designed monitors that love music  
as much as you do. Targeted at music lovers and  
post-production studios alike, the new MRmk3  
Series Powered Studio Monitors have been re-voiced  
and re-kitted, offering unparalleled clarity and  
unbelievable depth for today’s demanding home  
project or post-production studio requirements.  
What’s more, three types of input connectors  
are provided [XLR, 1/4" and RCA] to interface  
with virtually any application you may have.  
Your studio deserves a professional monitoring system  
with the flexibility and performance to up the level of  
your music production.  
A Variety Of Applications...  
Music Is All That Matters  
MRmk3 Series Powered Studio Monitors may be used  
in a variety of applications. Some examples include:  
When designing the MRmk3 Powered Studio Monitors,  
we didn’t start on paper. Instead, we poured through  
countless hours of music from every possible genre  
and source. Next, we focused on acoustic optimization  
with things like our minimum-diffraction waveguide  
that delivers unmatched clarity and an open feel that  
instantly connects you to the music. From perfectly  
optimized electronics to amps and drivers custom-  
matched for performance, MRmk3 monitors are  
designed for your music.  
Home and project studios – Music production for  
solo artists, small bands and DJs. Post-production edit/  
mix suites, recording, editing, mixdown, mastering of  
everything from spoken word performances to full music  
productions.  
A/V broadcast studios – Live broadcast/streaming  
of audio-only or AV content such as radio and TV.  
Production/Post-production focused on podcasts  
or other streaming audio. Voiceovers, too.  
Video post-production – Edit suites for small  
productions such as commercials, budget films  
or multimedia for internet broadcast, etc.  
Home theater and other multimedia – Music  
and movie playback, video game sound system,  
social function/party system, etc.  
4
MR5mk3 / MR6mk3 / MR8mk3  
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Quick Start  
An Extremely Important Note  
on MRmk3 Bass Response and  
Your Control Room  
We realize that you can’t wait to hook up your MRmk3  
Studio Monitors and try them out. Nevertheless, please  
take the time to read this page NOW, and the rest can  
wait until you’re good and ready.  
MRmk3s achieve the best bass response in a  
room that’s optimized for bass reproduction.  
A lot of factors can conspire to thwart the  
MRmk3s’ extended low frequency – including room shape,  
room volume and acoustical treatment.  
1. Turn the input level [6] control on the back of the  
cabinet down (fully counterclockwise) before turning  
on the monitor for the first time.  
This is not a cop-out or an apology. It’s plain old  
physics in action. Luckily we’ve 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:  
2. Set the power switch [2] on the back panel off. This will  
prevent you from accidentally connecting a hot signal  
source to the monitor and getting a rude surprise.  
Low-Frequency Response  
3. Leave the low freq [4] and high freq [5] filter switches  
at their normal positions.  
When you put your MRmk3s in a corner or up against  
walls, their bass characteristics change. The apparent  
loudness of the low frequencies increases when the  
monitors are placed close to a wall, and even more so  
when they are placed in a corner.  
4. Connect the line-level monitor signal from your mixer,  
preamp, or other signal source to the input [3] jack  
on the MRmk3 Studio Monitor (1⁄4", XLR, or RCA).  
If you have placed the monitors away from the walls  
and corners and you would like to hear a little more  
bass, try setting the low freq filter [4] switch to the +2  
dB position to provide a gentle boost to the woofer. If it’s  
still not enough bass, try the +4 dB position to provide a  
little more bass boost.  
5. Connect the supplied AC power cord to the IEC socket  
[1] on the back of the monitor. Plug the other end into  
an AC outlet properly configured with the voltage  
corresponding to the markings next to the IEC socket.  
6. Start your signal source (8-track player, turntable,  
CD player, DAW, or whatever), but leave the master  
volume control on the mixer or preamp down.  
High-Frequency Response  
The MRmk3s are designed to provide a smooth  
frequency response throughout the mid and high range.  
Nevertheless, you may decide that you need a little more  
or a little less high frequencies in your monitors while  
you are mixing. The high freq filter [5] switch provides  
a gentle boost or cut to the tweeter. Remember that  
boosting the high frequencies in the monitors can result  
in a duller mix, while reducing the high frequencies can  
result in a brighter overall mix.  
7. Turn on the power switch [2] on the MRmk3  
.
The Running Man logo [8] on the front panel  
will illuminate.  
8. Slowly turn up the input level [6] control on the back of  
the monitor to its fully clockwise position (MAX).  
9. Adjust the master volume on the mixer or preamp to  
a comfortably loud listening level. If the MRmk3 gets  
loud really fast, turn down the input level control to its  
center position (12 o’clock) to provide more volume  
control on the mixer or preamp.  
Additional Tidbits of Wisdom  
• Never listen to loud music for prolonged periods.  
Please see the Safety Instructions on page 2 for  
information on hearing protection.  
When you shut down your equipment, turn off the  
MRmk3 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.  
Enjoy the silky smooth highs and authoritative,  
commanding lows of the MRmk3. Then read the rest of  
this manual.  
• Save the shipping box! You may need it someday.  
• Save your sales receipt in a safe place. It’s your  
warranty!  
5
Owner’s Manual  
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Press the right side of this switch down to put the  
speaker into standby mode. It will not function, but  
the circuits are still live. To remove AC power, either  
turn off the AC supply, or unplug the power cord from  
the speaker and the AC supply.  
Rear Panel Description  
This is where the signal is connected to the monitor  
and adjustments are made to the frequency response of  
the speakers to match the monitor’s location and the  
room’s environment.  
3. Signal Inputs  
Connect the line-level signal from the mixer  
(or other signal source) to one of these input jacks.  
There are three types of input connectors to choose  
from: balanced XLR, balanced 1/4-inch, and unbalanced  
RCA. Since all three of them are connected together  
electrically, do not connect more than one signal at a  
time to the input jacks.  
7
3
XLR  
(BALANCED)  
A balanced signal provides better noise rejection  
and is the preferred method, especially if using a cable  
longer than 20 feet (6 meters).  
3
TRS  
(BALANCED)  
4
5
6
U
LOW FREQ  
FILTER  
HIGH FREQ  
FILTER  
3
They are wired as follows, according to standards  
specified by the AES (Audio Engineering Society):  
OFF  
MAX  
0
+2dB +4dB  
–2dB  
0
+2dB  
RCA  
(UNBALANCED)  
(NORMAL)  
(NORMAL)  
LEVEL  
INPUTS  
SETTINGS  
Balanced XLR  
WARNINGN: OT  
TO REDUCE THE RISK OF FIRE OR ELECTRIC  
SHOCK, DO  
EXPOSE THIS EQUIPMENT TO RAIN OR  
MOISTURE. DO NOT REMOVE COVER. NO USER SERVICEABLE  
POWER  
Hot (+)  
Cold (–)  
Shield (Ground)  
Pin 2  
Pin 3  
Pin 1  
PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.  
RISK OF ELECTRIC SHOCK  
DO NOT OPEN  
AVIS:  
N'OUVREZ PAS LA COUVERTURE. N'EXPOSEZ  
LA PLUIE OU L'HUMIDITÉ.  
AVIS: RISQUE DE CHOC ELECTRIQUE  
-
NE PAS OUVRIR PAS CET ÉQUIPEMENT  
À
À
SERIAL NUMBER  
REVISION  
ON  
2
1
2
SHIELD  
HOT  
CAUTION: REPLACEWITHTHE SAME FUSE AND RATING.  
DISCONNECT SUPPLY CORD BEFORE CHANGING FUSE.  
1
3
COLD  
SHIELD  
COLD  
HOT  
1
3
2
Balanced XLR Connectors  
1. Power Connection and Fuse  
Connect the power cord to this IEC socket securely,  
and plug the other end into a live AC outlet. Make sure  
the AC outlet has the correct voltage indicated next to  
Balanced 1/4" TRS  
Hot (+)  
Cold (–)  
Tip  
Ring  
the IEC socket  
.
Shield (Ground)  
Sleeve  
Disconnecting the plug’s ground pin is  
dangerous. Don’t do it!  
RING SLEEVE  
SLEEVE RINGTIP  
TIP  
The fuse is located behind the fuse cover, at the  
bottom of the IEC socket. See the “Troubleshooting”  
section on page 9 for information about replacing the  
fuse.  
RING  
TIP  
SLEEVE  
Balanced 1/4" Connectors  
Unbalanced RCA  
2. Power Switch  
Hot (+)  
Tip  
Sleeve  
Press this switch left to turn the MRmk3 studio  
monitor on. Make sure the level control [6] is down  
before you turn it on. When the power switch is turned  
on and the MRmk3 studio monitor is plugged into an  
AC outlet, the Running Man logo on the front of the  
monitor illuminates to let you know that it’s ready to go.  
Shield (Ground)  
SLEEVE  
TIP  
SLEEVE  
TIP  
RCA Unbalanced Connectors  
6
For more information on these connectors, see  
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MR5mk3 / MR6mk3 / MR8mk3  
 
4. Low Frequency Filter  
6. Input Level  
This switch tailors the overall low-frequency response  
by +2 dB or +4 dB at 100 Hz.  
The MRmk3 studio monitors expect a line-level signal  
at its input. Use this control to adjust the sensitivity of  
the input section according to the signal strength at its  
input.  
• For most applications, use the “0 (NORMAL)” setting.  
This takes the equalization circuit out of the signal path.  
• The MRmk3 studio monitors are designed to operate  
with a +4 dBu signal when the input level control is in  
the max position. In other words, wide open.  
• Refer to the Quick Start section on page 5 for the  
level-setting procedure.  
• If a little extra low-frequency output is necessary, use  
the +2 dB setting.  
• If even more low-frequency output is necessary,  
use the +4 dB setting. Remember how things work in  
reverse, so boosting the deep bass content on playback  
may actually decrease it in the final mix.  
7. Custom-Tuned Rear Port  
5. High Frequency Filter  
The custom-tuned rear port uses the radiation from  
the rear of the woofer cone to extend the low-frequency  
response of the speaker. The size of the port is carefully  
designed with respect to the volume of the cabinet  
and the characteristics of the woofer to produce  
low-frequency extension.  
This switch tailors the overall high-frequency  
response by:  
2 dB at 3 kHz and above [MR5mk3]  
2 dB at 3.25 kHz and above [MR6mk3]  
2 dB at 3 kHz and above [MR8mk3]  
Leave this switch in the “0 (NORMAL)” position  
unless:  
Front Panel Description  
You want to subtly brighten or darken the sound of the  
speakers.  
• Perhaps you have hearing loss caused by too many  
nights in front of a double Marshall stack.  
8. Running Man Logo LED  
The Running Man logo illuminates when the power  
switch [2] on the back of the MRmk3 studio monitor  
is turned on and AC power is available at the mains  
input [1].  
You just like to mix on the bright side or dull side.  
If the mixes consistently sound dull or dark when  
you listen elsewhere, this usually indicates that the  
monitors are too bright, relative to your normal hearing.  
A bit less high-frequency energy usually fixes this, and  
the mix may be forced in this direction by reducing the  
high-frequency output of the monitors by using the –2 dB  
position of the switch.  
Conversely, if the mixes are consistently too bright,  
then adding some additional high-frequency energy in  
the monitors satisfies your ears, and the resultant mix  
has less HF content.  
It’s a real rush to mix really loud. But remember that  
the resulting mix only sounds good when you play it at  
least that loud. However strange it may sound, mixes  
made at lower levels sound even better when played  
loud, perhaps even a bit bigger than life.  
Get that sound level meter out. Decide what level to  
mix at and use the meter to help keep mixing at that  
level. Your ears will thank you, and your mixes will be  
better for it.  
8
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Protection Circuits  
There are several protection mechanisms designed  
into the MRmk3 studio monitors to safeguard the  
speakers and amplifiers from inadvertent damage.  
Input Signal Wiring  
We recommend using high-quality, shielded cables  
to connect the signal source to the signal input jack [3]  
on MRmk3 studio monitors.  
CAUTION: The protection circuits  
are designed to prevent damage to the  
speakers under reasonable and sensible  
conditions. Should you choose to ignore the warning  
signs (i.e., excessive distortion), you can still damage  
the speakers in the MRmk3 studio monitors by  
overdriving them. Such damage is beyond the scope  
of the warranty.  
Three types of input connectors are provided to  
interface with virtually any application you may have:  
• Balanced microphone cables work well with the  
XLR input.  
• Balanced TRS cables work well with the 1/4" input.  
• Unbalanced phono cables work well with the RCA  
input.  
Overexcursion Protection  
A 12 dB/octave high-pass filter below port tuning  
just prior to the low-frequency amplifier prevents  
very low frequencies from being amplified. Excessive  
low-frequency energy below the usable frequency range  
can damage the woofer by causing it to “bottom out,”  
also known as overexcursion, which is equivalent  
to a mechanical form of clipping.  
NOTE: 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!  
NOTE: In certain home theater applications, it may  
be necessary to connect the speaker outputs from a  
stereo receiver to the inputs of the MRmk3 studio  
monitors if the receiver doesn’t have preamp outputs or  
other line-level output connections.  
Thermal Protection  
All amplifiers produce heat. The MRmk3 studio  
monitors are designed to be efficient both electrically  
and thermally.  
CAUTION: Do not attempt to connect a  
speaker output directly to the input of the  
MRmk3 studio monitor! Speaker levels are  
much higher than line levels and can damage the input  
circuitry in the MRmk3 studio monitors.  
• If for some reason the heatsink gets too hot,  
a thermal switch activates and turns off the amplifier.  
This protection operates independently for the  
low-frequency and high-frequency amplifiers.  
Therefore, it is possible for only the low frequency or  
high frequency amplifier to shut down while the other  
remains on.  
However, it is possible to insert a speaker-level to  
line-level signal attenuator between the receiver’s  
speaker output and the MRmk3 studio monitor’s input.  
Any local authorized dealer should be able to assist,  
or you can build your own.  
• When the heatsink cools down to a safe temperature,  
the thermal switch resets and normal operation  
resumes.  
More information (with illustrations!) may be found  
in Appendix B on page 11.  
• If the heatsink temperature again gets too hot, the  
shutdown process repeats. Should this happen, make  
sure that airflow to the rear of the cabinet is not  
restricted.  
Care and Cleaning  
MRmk3 Reference Studio Monitors will provide many  
years of reliable service if you follow these guidelines.  
Integrated Magnetic Shielding  
• Avoid exposing the monitors to moisture.  
• Avoid exposure to extreme cold (below freezing  
temperatures).  
• Use a dry cloth to clean the cabinets. Only do this when  
the power is turned off.  
The MRmk3 studio monitors contain drivers with  
large magnetic structures. The drivers’ magnets are  
not shielded. 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.  
8
MR5mk3 / MR6mk3 / MR8mk3  
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Appendix A: Service Information  
If you think your MRmk3 Studio Monitor has  
a problem, please check out the following  
No Sound  
• Is the Running Man logo [8] on the front panel  
illuminated? If not, refer to “No Power” to the left.  
• Is the input level [6] control turned up?  
• Is the signal source turned up? Make sure the signal level  
from the mixing console (or whatever device  
immediately precedes the studio monitor) is high  
enough to produce sound.  
troubleshooting tips and do your best to confirm  
the problem. Visit the Support section of our website  
information such as FAQs and other documentation.  
You may find the answer to the problem without having  
to send your MRmk3 away.  
• If it’s a stereo pair, try switching them around. For  
example, if a left output is presumed dead, switch the  
left and right cords at the monitor end. If the problem  
switches sides, it’s not the monitor. It could be a bad  
cable, or no signal from the mixer.  
Troubleshooting  
No Power  
• Our favorite question: Is it plugged in?  
• Make sure the power cord is securely seated in the IEC  
socket [1] and plugged all the way into the AC outlet.  
• Make sure the AC outlet is live (check with a tester or  
lamp).  
• Is the power [2] switch on the rear panel in the ON  
position?  
• Is the Running Man logo [8] on the front panel  
illuminated? If not, make sure the AC outlet is live.  
If so, refer to “No Sound” below.  
Bad Sound  
Is the input connector plugged completely into the jack?  
If using a 14" plug, make sure it is plugged all the way in.  
• Is it loud and distorted? Reduce the signal level at the  
mixer.  
• If possible, listen to the signal source with headphones  
plugged into the preamp stage. If it sounds bad there,  
it’s not the monitor.  
• Too much bass or not enough bass? Move around the  
room and see if the bass response changes. It’s possible  
your listening position coincides with a room mode  
where the low frequencies either become exaggerated  
or nulled. If so, try moving the monitors to a different  
position, or moving your listening position.  
• If the power indicator is not illuminated, and you are  
certain that the AC outlet is live, it is possible the fuse  
has blown.  
To remove and replace the fuse:  
1. Disconnect the power cord from the IEC socket.  
2. Remove the fuse drawer by prying it open with a  
Noise/Hum/Buzz  
small screwdriver. It will slide all the way out.  
Check the signal cable between the mixer and the  
monitor. Make sure all connections are secure. These  
problems usually produce crackling noises, hum, or buzz.  
If connecting an unbalanced output to the MRmk3  
studio monitor’s balanced input, make sure the shield  
is connected to the unbalanced ground of the source  
and to pins 1 and 3 of the XLR.  
• If a CATV cable is connected to the system, try  
disconnecting it. If the hum goes away, call your cable  
carrier to check for proper grounding of the cable.  
FUSE  
• Make sure the signal cable is not routed near AC cables,  
power transformers, or other EMI sources (including  
wall warts and line lumps!). These sources usually  
produce hum.  
3. Remove the fuse and replace it with an  
equivalent-type fuse.  
115 VAC: T 1 AL / 250 V  
• Is there a light dimmer or other triac-based device 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.  
230 VAC: T 500 mAL / 250 V [MR5mk3]  
115 VAC: T 1.25 AL / 250 V  
230 VAC: T 625 mAL / 250 V [MR6mk3]  
• Excessive hiss is an indication of an incorrect gain  
setting somewhere before the speaker.  
115 VAC: T 2 AL / 250 V  
230 VAC: T 1 AL / 250 V [MR8mk3]  
• If possible, listen to the signal source with headphones  
plugged in. If it sounds noisy there, it’s not the monitor.  
4. Replace the fuse drawer by pushing it all the way  
back into the IEC socket.  
If two fuses blow in a row, then something is very wrong.  
See the “Repair” section on the next page to find out  
how to proceed.  
9
Owner’s Manual  
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Repair  
For warranty service, please refer to the warranty  
information on page 15.  
Non-warranty service is available at a factory-  
authorized service center. To locate the nearest  
Tech Support” and select “Locate a Service Center  
or Distributor” [3]. Service for MRmk3s living  
outside the United States may be obtained through  
local dealers or distributors.  
If you do not have access to our website, please call  
our Tech Support department at 1-800-898-3211 (normal  
business hours, Pacific Time), to explain the problem.  
They will tell you where the nearest factory-authorized  
service center is located in your area.  
Need help with the MRmk3 Studio Monitor?  
Email us at: [email protected].  
Telephone 1-800-898-3211 to speak with one of our splendid technical support  
chaps (Monday through Friday, normal business hours, Pacific Time).  
10  
MR5mk3 / MR6mk3 / MR8mk3  
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Appendix B: Connectors  
Balanced XLR Input Connector  
Unbalanced RCA Input Connector  
XLR connectors are used to make balanced  
connections to the MRmk3 studio monitors. They  
are wired as follows, according to standards specified  
by the AES (Audio Engineering Society).  
RCA-type plugs (also known as phono plugs)  
and jacks are often used in home stereo and video  
equipment and in many other applications. They are  
unbalanced and electrically equivalent to a 1/4" TS  
phone plug.  
Balanced XLR Input Connector  
Pin 1 – Shield (Ground)  
Unbalanced RCA Input Connector  
Pin 2 – Positive (+ or hot)  
Pin 3 – Negative (– or cold)  
Tip – Positive (+ or hot)  
Sleeve – Shield (Ground)  
2
SHIELD  
HOT  
SLEEVE  
TIP  
SLEEVE  
TIP  
1
3
COLD  
SHIELD  
COLD  
HOT  
1
3
Unbalanced RCA Connectors  
2
Balanced XLR Connectors  
Balanced 1/4" TRS Input Connector  
“TRS” stands for Tip-Ring-Sleeve, the three  
connections available on a stereo 1/4" or balanced  
phone jack or plug. TRS jacks and plugs are used  
to make balanced connections to the MRmk3 studio  
monitors.  
Balanced 1/4" TRS Input Connector  
Tip – Positive (+ or hot)  
Ring – Negative (– or cold)  
Sleeve – Shield (Ground)  
RING SLEEVE  
TIP  
SLEEVE RINGTIP  
RING  
TIP  
SLEEVE  
Balanced 1/4" Connectors  
11  
Owner’s Manual  
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Appendix C: Technical Information  
AC Power Requirements  
MRmk3 Specifications  
US:  
120 VAC, 60 Hz  
240 VAC, 50 Hz  
220 VAC, 60 Hz  
100 VAC, 50/60 Hz  
Europe:  
Korea:  
Japan:  
Acoustic Performance  
Frequency Response (-3 dB):  
57 Hz – 20 kHz [MR5mk3]  
46 Hz – 20 kHz [MR6mk3]  
38 Hz – 20 kHz [MR8mk3]  
Note: MRmk3 monitors do not support multiple voltage  
configurations. Make sure the voltage rating for your particular  
model (as indicated on the rear panel near the IEC socket)  
corresponds with your local AC mains voltage.  
Frequency Response (-10 dB):  
45 Hz – 20 kHz [MR5mk3]  
38 Hz – 20 kHz [MR6mk3]  
35 Hz – 20 kHz [MR8mk3]  
AC Connector:  
Fuse:  
3-pin IEC 250 VAC, 16 A male  
115 VAC: T 1 AL / 250 V  
230 VAC: T 500 mAL / 250 V [MR5mk3]  
Sound Pressure Level @ 1 meter, +4 dBu into Balanced Input:  
102 dB SPL @ 1m [MR5mk3]  
115 VAC: T 1.25 AL / 250 V  
230 VAC: T 625 mAL / 250 V [MR6mk3]  
105 dB SPL @ 1m [MR6mk3]  
107 dB SPL @ 1m [MR8mk3]  
115 VAC: T 2 AL / 250 V  
230 VAC: T 1 AL / 250 V [MR8mk3]  
Maximum SPL Per Pair:  
108 dB SPL @ 1m [MR5mk3]  
111 dB SPL @ 1m [MR6mk3]  
113 dB SPL @ 1m [MR8mk3]  
Power Consumption:  
90 watts with music, loud mix  
7 watts quiescent (idle) [MR5mk3]  
Transducers  
Low Frequency:  
120 watts with music, loud mix  
7 watts quiescent (idle) [MR6mk3]  
5.25 in / 133 mm hyperbolic  
curved cone woofer [MR5mk3]  
6.5 in / 165 mm hyperbolic  
curved cone woofer [MR6mk3]  
8.0 in / 203 mm hyperbolic  
curved cone woofer [MR8mk3]  
150 watts with music, loud mix  
10 watts quiescent (idle) [MR8mk3]  
Physical Dimensions and Weight  
MR5mk3:  
High Frequency:  
Neodymium magnet driven  
1 in / 25 mm silk dome tweeter  
Enclosure:  
0.47 in / 12 mm thick MDF with  
0.98 in / 25 mm MDF front panel  
Amplifiers  
Low Frequency Power:  
30 watts, 4 Ω load,  
60 watts peak [MR5mk3]  
Dimensions:  
Height:  
11.3 in / 286 mm  
7.8 in / 197 mm  
10.9 in / 276 mm  
12.1 lb / 5.5 kg  
40 watts, 4 Ω load,  
80 watts peak [MR6mk3]  
Width:  
Depth:  
Weight:  
55 watts, 4 Ω load,  
110 watts peak [MR8mk3]  
MR6mk3:  
High Frequency Power:  
20 watts, 8 Ω load,  
40 watts peak [MR5mk3]  
Enclosure:  
0.47 in / 12 mm thick MDF with  
0.98 in / 25 mm MDF front panel  
25 watts, 8 Ω load,  
50 watts peak [MR6mk3]  
Dimensions:  
Height:  
12.7 in / 323 mm  
8.7 in / 222 mm  
12 in / 305 mm  
15.9 lb / 7.2 kg  
Width:  
Depth:  
Weight:  
30 watts, 8 Ω load,  
60 watts peak [MR8mk3]  
Type:  
Monolithic IC, Class AB with  
DMOS power stage  
MR8mk3:  
Enclosure:  
0.59 in / 15 mm thick MDF with  
0.98 in / 25 mm MDF front panel  
Electronic Crossover  
Crossover Type:  
24 dB/octave  
Dimensions:  
Height:  
15.8 in / 400 mm  
10.9 in / 277 mm  
13.2 in / 336 mm  
23.8 lb / 10.8 kg  
Crossover Frequency:  
3 kHz [MR5mk3]  
3.25 kHz [MR6mk3]  
3 kHz [MR8mk3]  
Width:  
Depth:  
Weight:  
Sensitivity:  
+4 dBu at 300 Hz for full output  
Damping:  
Adiabatic batting [MR5/6/8mk3]  
Input Impedance:  
20 kΩ, balanced bridging;  
10 kΩ unbalanced  
Disclaimer  
Equalization  
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.  
Low Frequency EQ:  
+2 dB/+4 dB @ 100 Hz, shelving  
High Frequency EQ:  
2 dB @ 3 kHz, shelving [MR5mk3]  
2 dB @ 3.25 kHz, shelving [MR6mk3]  
2 dB @ 3 kHz, shelving [MR8mk3]  
12  
MR5mk3 / MR6mk3 / MR8mk3  
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MR5mk3 Dimensions  
7.8" / 197 mm  
10.9" / 276 mm  
WEIGHT  
12.1 lb /  
5.5 kg  
11.3" /  
286 mm  
MR6mk3 Dimensions  
8.7" / 222 mm  
12" / 305 mm  
WEIGHT  
15.9 lb /  
7.2 kg  
12.7" /  
323 mm  
MR8mk3 Dimensions  
10.9" / 277 mm  
13.2" / 336 mm  
WEIGHT  
23.8 lb /  
10.8 kg  
15.8" /  
400 mm  
13  
Owner’s Manual  
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MRmk3 Block Diagram  
The following are trademarks or registered trademarks of LOUD Technologies Inc.: MR Series and the Running Man.  
This manual also contains names and marks of other companies which belong to those respective companies,  
and are hereby acknowledged.  
©2015 LOUD Technologies Inc. All Rights Reserved.  
14  
MR5mk3 / MR6mk3 / MR8mk3  
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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.720trees.com 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.720trees.com or by calling LOUD technical support at 1.800.898.3211 (toll-free  
in the U.S. and Canada) during normal business hours Pacific Time, excluding weekends or LOUD  
holidays. Please retain the original dated sales receipt as evidence of the date of purchase. You will  
need it to obtain any warranty service.  
For full terms and conditions, as well as the specific duration of the Warranty for this product, please  
visit www.720trees.com.  
The Product Warranty, together with your invoice or receipt, and the terms and conditions located  
at www.720trees.com 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.  
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 (2012/19/EU) 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.  
15  
Owner’s Manual  
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16220 Wood-Red Road NE  
Woodinville, WA 98072 • USA  
Phone: 425.487.4333  
Toll-free: 800.898.3211  
Fax: 425.487.4337  
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