Mackie Speaker System MR8MK2 User Manual

MR8mk2  
High Resolution Powered Studio Monitor  
O W N E R ’ S M A N U A L  
 
MR8mk2 Features  
Contents  
IMPORTANT SAFETY INSTRUCTIONS ...............................................2  
High-resolution, powered studio reference monitor  
INTRODUCTION...............................................................................4  
QUICK START...........................................................................5  
Ultra-low distortion 8" woofer  
Long voice coil winding length allows high output  
with controlled low frequency performance  
REAR PANEL DESCRIPTION ..............................................................6  
1. SIGNAL INPUTS................................................................6  
2. INPUT LEVEL ....................................................................6  
3. HIGH FREQUENCY FILTER.................................................6  
4. LOW FREQ FILTER ............................................................7  
5. POWER SWITCH ..............................................................7  
6. MAINS INPUT AND FUSE..................................................7  
7. BASS REFLEX PORT..........................................................7  
Optimally sized inverted dust cap stiffens cone for  
smooth response  
Hyperbolic curved cone profile reduces severe  
cone resonances  
High-output 1" silk dome tweeter  
Neodymium magnet minimizes distortion and  
handles fast transients in dynamic source material  
FRONT PANEL DESCRIPTION............................................................7  
8. POWER INDICATOR .........................................................7  
Ferro-fluid cooling protects against power  
compression  
PROTECTION CIRCUITS....................................................................8  
OVEREXCURSION PROTECTION ...........................................8  
THERMAL PROTECTION........................................................8  
INTEGRATED MAGNETIC SHIELDING.....................................8  
INPUT SIGNAL WIRING........................................................8  
Acoustic absorption backing material provides  
smooth, reflection-free performance  
Precision Class A/B amplification with Active  
protection circuits: 100W for LF / 50W for HF  
CARE AND CLEANING ......................................................................8  
Optimally sized custom waveguide provides seamless  
transition of HF and LF  
APPENDIX A: SERVICE INFO ............................................................9  
TROUBLESHOOTING.............................................................9  
REPAIR...............................................................................10  
Minimum-diffraction molded baffle imparts superior  
stereo imaging and depth  
APPENDIX B: CONNECTORS...........................................................11  
Adjustable HF and LF acoustic controls offer sonic  
tailoring to your mixing space  
APPENDIX C: TECHNICAL INFORMATION.......................................12  
MR8MK2 SPECIFICATIONS ....................................................12  
MR8MK2 BLOCK DIAGRAM..................................................13  
Flexible inputs include XLR, TRS and RCA  
connections  
MR8MK2 LIMITED WARRANTY.....................................................15  
Magnetic shielding allows safe placement near  
computers and video monitors  
Precisely tuned to work interchangeably with other  
MRmk2 monitors  
Don’t forget to visit our website at www.mackie.com  
for more information about this and other Mackie products.  
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.  
Part No. SW0894 Rev. B 05/11  
©2011 LOUD Technologies Inc. All Rights Reserved.  
3
Owner’s Manual  
 
Introduction  
The MR8mk2 Mackie Reference Monitor is the perfect  
solution for those ready to step up to a truly professional,  
high-output monitoring system. The completely  
re-voiced MR8mk2 features all-new high-end drivers,  
delivering unmatched low frequency extension and  
clear, articulate highs. The MR8mk2’s precision Class  
A/B amplification (100W LF / 50W HF) offers  
class-leading power, tons of connection options and  
simple acoustic controls for room correction. Featuring  
an optimally sized custom waveguide and  
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 40 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 isn’t  
compromised by the resistance of long speaker  
cables.  
minimum-diffraction molded baffle, the MR8mk2  
delivers superior stereo imaging and depth. With  
unbelievable power, performance and clarity, the  
MR8mk2 stands alone in its class.  
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.  
Investments in Excellence...  
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.  
The MR8mk2s were designed by our expert  
loudspeaker and transducer engineering teams at  
Mackie and EAW. These compact studio monitors can be  
used in a variety of applications, including small project  
studios, surround sound editing, home theater playback,  
and desktop audio workstations (DAWs).  
All-New Transducers...  
The MR8mk2s feature an 8-inch high-precision, low-  
distortion woofer and a 1-inch neodymium silk dome  
tweeter.  
High-frequency and low-frequency switches are  
provided on the rear panel to adjust the sound of the  
monitors to the characteristics of the room. Three types  
of input connectors are provided (XLR, 1/4-inch, and  
RCA), to interface with virtually any application you  
may have.  
The high-frequency driver is mounted on a molded  
baffle/waveguide, which reduces diffraction and results  
in wide, controlled dispersion of high-frequency sounds.  
This widens the “sweet spot” and improves the time  
domain characteristics of the system.  
The result? The MR8mk2 Studio Monitors are extremely  
accurate and versatile, with unique controls that allow  
you to fine-tune the sound to match your individual  
environment precisely. You’re gonna love these!  
Precision Power Amplifiers...  
The low-frequency amplifier produces up to 55 watts  
continuous before clipping, while the high-frequency  
amplifier produces up to 30 watts continuous. Both  
amplifiers are Class A/B with power MOSFET outputs  
and active protection circuits.  
What are they? The Advantages...  
The MR8mk2 Studio Monitors are two-way,  
bi-amplified, active monitors employing a bass reflex  
(ported) design for an extended low-frequency  
response. There are many benefits to integrating an  
active crossover, power amplifiers, and drivers into a  
single cabinet, and we’ve taken full advantage of these  
benefits in the design of the MR8mk2.  
Cabinet Design...  
The cabinet is made of MDF with a textured matte-  
black finish. Internal bracing increases the strength and  
rigidity of the box. An open-cell adiabatic foam material  
fills the inside of the box to absorb internal reflections  
and dampen standing waves.  
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.  
4
MR8mk2  
 
An Extremely Important Note on  
MR8mk2 Bass Response and Your  
Control Room.  
Quick Start  
We realize that you can’t wait to hook up your new  
Mackie MR8mk2 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.  
Your new MR8mk2s achieve their best bass  
response in a room that’s optimized for bass  
reproduction. A lot of factors can conspire to  
thwart the MR8mk2s’ extended low frequency – including  
room shape, room volume and acoustical treatment.  
1. Turn the INPUT LEVEL [2] 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 [5] 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 High Freq [3] and Low Freq [4] Filter  
switches at their Normal positions.  
When you put your MR8mk2s 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 [1] jack on  
the MR8mk2 Studio Monitor (1⁄4-inch PHONE, 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 low  
frequencies (below 100 Hz). 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  
[6] 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.  
High-Frequency Response  
6. Start your signal source (tape deck, CD, DAW, or  
whatever), but leave the master volume control on your  
mixer or preamp down.  
The MR8mk2s 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 [3] switch  
provides a gentle boost or cut in the frequencies above  
5 kHz. 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 [5] on the MR8mk2. The  
power LED [8] on the front panel will illuminate.  
8. Slowly turn up the INPUT LEVEL [2] control on the  
back of the monitor to its fully clockwise position  
(MAX).  
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.  
9. Adjust the master volume on your mixer or preamp to  
a comfortably loud listening level. If the MR8mk2 gets  
loud really fast, turn down the INPUT LEVEL control to  
its center position (12 o’clock) to provide more volume  
control on your mixer or preamp.  
When you shut down your equipment, turn off the  
MR8mk2 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 MR8mk2. 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  
 
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.  
2. INPUT LEVEL  
The MR8mk2 expects 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.  
• The MR8mk2 is designed to operate with a +4 dBu  
signal when the input level control is in the max  
position. In other words, wide open.  
1. SIGNAL INPUTS  
There are three types of input connectors: XLR,  
1/4-inch, and RCA. Since all three of them are  
connected together electrically, do not connect more  
than one signal at a time to the input jacks.  
• Refer to the Quick Start section on page 5 for the  
level-setting procedure.  
• The XLR connector and 1/4-inch TRS (tip-ring-sleeve)  
connector accept a balanced signal while the RCA  
connector accepts an unbalanced signal. A balanced  
signal provides better noise rejection and is the  
preferred method, especially if using a cable longer than  
20 feet (6 meters).  
3. HIGH FREQUENCY FILTER  
This switch tailors the overall high-frequency  
response by 2 dB at 5 kHz and above. Leave this switch  
in the “0 (NORMAL)” position unless:  
You want to subtly brighten or darken the sound of the  
• The 1/4-inch TRS jack may also accept an unbalanced  
speakers.  
signal from a 1/4-inch TS (tip-sleeve) plug.  
• Perhaps you have hearing loss caused by too many  
The connectors are wired as follows (per the  
AES/IEC standard):  
nights in front of a double Marshall stack.  
You just like to mix on the bright side or dull side.  
XLR  
TRS  
RCA  
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.  
Hot (+)  
Cold (–)  
Shield (Ground)  
Pin 2  
Pin 3  
Pin 1  
Tip  
Ring  
Shield Shield  
Tip  
For more information on these connectors, see  
Appendix B on page 11.  
INPUT  
SETTINGS  
HIGH FREQ  
FILTER  
CAUTION: REPLACE WITH THE  
SAME FUSE AND RATING. DISCONNECT  
SUPPLY CORD BEFORE CHANGING FUSE.  
RCA  
XLR  
(UNBALANCED)  
(BALANCED)  
INPUT  
3
4
0
+2dB  
2dB  
(NORMAL)  
ON  
2
TRS  
(BALANCED)  
LOW FREQ  
FILTER  
1
5
OFF  
MAX  
LEVEL  
6
+
+
2dB 4dB  
(NORMAL)  
0
7
6
MR8mk2  
 
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.  
5. POWER SWITCH  
Switch up to turn the MR8mk2 on. Make sure the  
level control is down before you turn it on. When the  
power switch is turned on and the MR8mk2 is plugged  
into an AC outlet, the power LED on the front of the  
monitor lights up to let you know the MR8mk2 is ready  
to go.  
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.  
Press the bottom of this switch 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.  
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.  
6. MAINS INPUT AND FUSE  
4. LOW FREQUENCY FILTER  
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  
the IEC socket.  
This switch tailors the overall low-frequency response  
by +2 dB or +4 dB at 100 Hz.  
• For most applications, use the “0 (NORMAL)” setting.  
This takes the equalization circuit out of the signal path.  
• If a little extra low-frequency output is necessary, use  
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.  
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. BASS REFLEX PORT  
A bass reflex system 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.  
Front Panel  
Description  
8. Power Indicator  
The power indicator lights up when the  
power switch [5] on the back of the MR8mk2  
is turned on and AC power is available at the  
mains input [6].  
8
7
Owner’s Manual  
 
Protection Circuits  
There are several protection mechanisms designed  
into the MR8mk2 to safeguard the loudspeakers and  
amplifiers from inadvertent damage.  
Input Signal Wiring  
You should use high-quality, shielded cable to connect  
the signal source to the signal input jack [1] on the  
MR8mk2.  
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., excessive distortion), you can still damage  
the speakers in the MR8mk2 by overdriving them. Such  
damage is beyond the scope of the warranty.  
• For balanced signals, foil shielded cables, such as  
Belden 8451, 8761, or 9501 are commonly used for  
studio wiring.  
• Microphone cables work well for the XLR input.  
• 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!  
Overexcursion Protection  
A 12 dB/octave high-pass filter at 40 Hz just prior to  
the low-frequency amplifier prevents very low  
frequencies from being amplified. Excessive  
low-frequency energy below 40 Hz can damage the  
woofer by causing it to “bottom out,” also known as  
overexcursion, which is equivalent to a mechanical form  
of clipping.  
Quality cables may be purchased from Mackie dealers.  
In certain home theater applications, it may be necessary  
to connect the speaker outputs from a stereo receiver to  
the inputs of the MR8mk2, 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  
MR8mk2! Speaker levels are much higher  
Thermal Protection  
than line levels and can damage the input circuitry in  
the MR8mk2.  
All amplifiers produce heat. The MR8mk2 is designed  
to be efficient both electrically and thermally.  
However, it is possible to insert a speaker-level to  
line-level signal attenuator between the receiver’s  
speaker output and the MR8mk2’s input. The local  
Mackie dealer should be able to assist, or you can build  
your own.  
• 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.  
Care and Cleaning  
• When the heatsink cools down to a safe temperature,  
the thermal switch resets and normal operation  
resumes.  
• 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.  
Mackie Reference Studio Monitors will provide many  
years of reliable service if you follow these guidelines.  
• 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  
Integrated Magnetic Shielding  
the power is turned off.  
The MR8mk2 contains drivers with large magnetic  
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.  
8
MR8mk2  
 
Appendix A: Service Information  
If you think your Mackie product has a problem,  
please check out the following troubleshooting tips and  
No Sound  
• Is the power indicator [8] on the front panel  
illuminated? If not, refer to “No Power” above.  
• Is the input level [2] 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.  
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 documentation. You may find the answer  
to the problem without having to send your Mackie  
product 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 [6] and plugged all the way into the AC outlet.  
• Make sure the AC outlet is live (check with a tester or  
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.  
lamp).  
• Is it loud and distorted? Reduce the signal level at the  
• Is the power [5] switch on the rear panel in the ON  
mixer.  
position?  
• If possible, listen to the signal source with headphones  
plugged into the preamp stage. If it sounds bad there,  
it’s not the monitor.  
• Is the power indicator [8] on the front panel  
illuminated? If not, make sure the AC outlet is live.  
If so, refer to “No Sound” below.  
• 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 MR8mk2  
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 unit: 1.6 amp slo-blo (T 1.6 AL/250V)  
• 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 unit: 800 milliamp slo-blo (T 800 mAL/250V)  
4. Replace the fuse drawer by pushing it all the way  
back into the IEC socket.  
• Excessive hiss is an indication of an incorrect gain  
setting somewhere before the speaker.  
• If possible, listen to the signal source with headphones  
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.  
plugged in. If it sounds noisy there, it’s not the monitor.  
Owner’s Manual  
9
 
Repair  
For warranty service, please refer to the warranty  
information on page 15.  
Non-warranty service for Mackie products is  
available at a factory-authorized service center. To  
locate your nearest service center, visit  
Service Center.”  
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.  
Service for Mackie products living outside the United  
States can be obtained through local dealers or  
distributors.  
Need help with your new MR8mk2?  
FAQs, manuals, and addendums.  
Email us at: [email protected].  
Telephone 1-800-898-3211 to speak with one of our splendid  
technical support representatives, (normal business hours, PST).  
10  
MR8mk2  
 
Appendix B: Connectors  
XLR Connectors  
1/4" TS Phone Plugs and Jacks  
XLR connectors are used to make balanced  
connections to the MR5mk2. They are wired as follows,  
according to standards specified by the AES (Audio  
Engineering Society).  
“TS” stands for Tip-Sleeve, the two connections  
available on a mono 1/4" phone jack or plug. They are  
used for unbalanced signals. It is okay to connect an  
unbalanced 1/4" phone plug into the 1/4" TRS phone  
jack on the MR5mk2.  
XLR  
Hot (+) Pin 2  
Cold (–)Pin 3  
Shield (Ground)Pin 1  
1/4" TS Unbalanced Wiring:  
Hot (+) Tip  
Shield (Ground) Sleeve  
2
SHIELD  
HOT  
SLEEVE  
SLEEVE  
TIP  
TIP  
1
3
COLD  
TIP  
SHIELD  
1
SLEEVE  
3
COLD  
2
Unbalanced 1/4" Connectors  
HOT  
SHIELD  
COLD  
HOT  
1
3
2
Balanced XLR Connectors  
RCA Plugs and Jacks  
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.  
1/4" TRS Phone Plugs and  
Jacks  
“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 MR5mk2.  
RCA Unbalanced Wiring:  
Hot (+) Tip  
1/4" TRS Balanced Wiring:  
Hot (+) Tip  
Shield (Ground) Sleeve  
TIP  
SLEEVE TIP SLEEVE  
Cold (–) Ring  
Shield (Ground) Sleeve  
RING SLEEVE  
TIP  
SLEEVE RING TIP  
RCA Unbalanced Connectors  
RING  
TIP  
SLEEVE  
Balanced 1/4" Connectors  
11  
Owner’s Manual  
 
Appendix C: Technical Information  
MR8mk2 Specifications  
Acoustic Performance  
AC Power Requirements  
Free Field Frequency Response:  
US:  
120 VAC, 60 Hz  
240 VAC, 50 Hz  
220 VAC, 60 Hz  
100 VAC, 50/60 Hz  
40 Hz – 20 kHz  
Europe:  
Korea:  
Japan:  
Sound Pressure Level @ 1 meter, +4 dBu into Balanced Input:  
107 dB SPL @ 1m  
Note: The MR8mk2 does 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.  
Maximum SPL Per Pair:  
119 dB SPL @ 1m  
Transducers  
Low Frequency:  
AC Connector:  
Fuse:  
3-pin IEC 250 VAC, 16 A male  
8.0 in / 204 mm hyperbolic  
curved cone woofer  
115 VAC: T 3.15AL/250 V  
230 VAC: T 1.6AL/250 V  
High Frequency:  
Neodymium magnet driven  
1 in / 25 mm silk dome tweeter  
Power Consumption:  
100 watts with music, loud mix  
20 watts quiescent (idle)  
Amplifiers  
Low Frequency Power:  
100 watts, 4 Ω load,  
200 watts peak  
Physical Dimensions and Weight  
High Frequency Power:  
Type:  
50 watts, 8 Ω load,  
100 watts peak  
Enclosure:  
0.630 in / 16 mm thick MDF with  
0.750 in / 19.5 mm MDF front panel  
Monolithic IC, Class AB with  
DMOS power stage  
Damping:  
Adiabatic batting  
Dimensions:  
Height:  
15.7 in / 400 mm  
10.9 in / 277 mm  
13.0 in / 330 mm  
27.6 lb / 12.5 kg  
Width:  
Depth:  
Weight:  
Electronic Crossover  
Crossover Type:  
24 dB/octave  
Crossover Frequency:  
Sensitivity:  
3 kHz  
+4 dBu at 300 Hz for full output  
Input Impedance:  
20 kΩ, balanced bridging;  
10 kΩ unbalanced  
Disclaimer  
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.  
Equalization  
Low Frequency EQ:  
+2 dB/+4 dB @ 100 Hz, shelving  
2 dB @ 5 kHz, shelving  
High Frequency EQ:  
10.9" / 277 mm  
MR8mk2  
WEIGHT  
27.6 lb /  
12.5 kg  
15.7" /  
400 mm  
13.0" /  
330 mm  
12  
MR8mk2  
 
MR8mk2 Block Diagram  
+HI VDC  
RCA  
UNBALANCED  
LINE INPUT  
HI-FREQUENCY  
DRIVER  
HI-FREQUENCY  
POWER AMPLIFIER  
HIGH FREQ  
CROSSOVER  
+2 dB  
0
–2 dB  
HI-FREQ  
LO-FREQ  
XLR  
BALANCED  
LINE INPUT  
2
3
TWEETER  
1
INPUT LEVEL  
1/4"  
UNBALANCED  
LINE INPUT  
–HI VDC  
+HI VDC  
DARK SIDE  
OF THE MOON  
LO-FREQUENCY  
POWER AMPLIFIER  
LO-FREQUENCY  
DRIVER  
OVEREXCURSION  
LOW FREQ  
PROTECT  
+4 dB  
+2 dB  
0
WOOFER  
44 Hz  
–HI VDC  
POWER  
FUSE  
POWER  
LED  
+
HI VDC  
+
TOROIDAL POWER  
TRANSFORMER  
LO VDC  
The following are trademarks or registered  
trademarks of LOUD Technologies Inc.: The Mackie logo,  
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.  
©2011 LOUD Technologies Inc. All Rights Reserved.  
13  
Owner’s Manual  
 
AVIS: RISQUE DE CHOC ELECTRIQUE  
NE PAS OUVRIR  
WARNING: 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.  
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES FOR  
THE U.S. AND ICES-003, FOR CANADA. OPERATION IS SUBJECT  
TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY  
NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE  
MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING  
INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.  
SERIAL NUMBER  
REVISION  
INPUT  
SETTINGS  
HIGH FREQ  
FILTER  
CAUTION: REPLACE WITH THE  
SAME FUSE AND RATING. DISCONNECT  
SUPPLY CORD BEFORE CHANGING FUSE.  
RCA  
XLR  
(BALANCED)  
(UNBALANCED)  
INPUT  
0
+2dB  
2dB  
(NORMAL)  
ON  
TRS  
(BALANCED)  
LOW FREQ  
FILTER  
OFF  
LEVEL  
MAX  
+
+
0
2dB 4dB  
(NORMAL)  
14  
MR8mk2  
 
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 (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.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.  
15  
Owner’s Manual  
 
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  
 

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