Mackie Car Speaker MR8 User Manual

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High Resolution Active Studio Monitor  
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Contents  
• Please write the serial number for your studio monitor here  
(all studio monitors if you have more than one) for future reference  
(i.e., insurance claims, tech support, return authorization, etc.):  
Monitor 3  
Monitor 1  
Monitor 2  
Purchased at:___________________________________ Date of Purchase:_____________  
for more information about this and other Mackie products.  
Part No. SW0568 Rev. D 01/09  
©2007-2009 LOUD Technologies Inc. All Rights Reserved.  
Owner’s Manual  
INTRODUCTION  
Thank you for choosing the MR8 Mackie Reference  
Studio Monitors. Just as we revolutionized the studio  
monitor market with our flagship HR824 Studio Monitor,  
we have done it again with the most affordable precision  
active studio monitors ever made. The MR8 features  
design elements shared by our HR MK2 Series high reso-  
lution studio monitors, providing a level of performance  
never before available at this price.  
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 compro-  
mised by the resistance of long speaker cables.  
The acoustic sum of the outputs from the two driv-  
ers are optimized electronically, as well as physi-  
cally, 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.  
Investments in Excellence...  
The MR8s 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).  
The Transducers...  
The MR8s feature an 8-inch high-precision, low-dis-  
tortion woofer and a 1-inch high-resolution tweeter.  
High-frequency and low-frequency switches are pro-  
vided on the rear panel to adjust the sound of the moni-  
tors 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 MR8 Studio Monitors are extremely ac-  
curate and versatile, with unique controls that allow you  
to fine-tune the sound to match your individual environ-  
ment precisely. You’re gonna love these!  
The Cabinet...  
The cabinet is made of MDF with a matte-black finish.  
Internal bracing increases the strength and rigidity  
(stiffness) of the box. An open-cell adiabatic foam mate-  
rial fills the inside of the box to absorb internal reflec-  
tions and dampen standing waves.  
What are they? The Advantages...  
The MR8 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 MR8.  
Power Amplifiers...  
The low-frequency amplifier produces up to 100 watts  
continuous before clipping, while the high-frequency  
amplifier produces up to 50 watts continuous. Both am-  
plifiers are Class A/B with active protection circuits.  
The crossover point is designed so that the high- and  
low-frequency drivers are fed only the frequencies  
they are best able to reproduce.  
The amplifiers are designed to provide maximum  
acoustic output from the speakers, yet minimize  
the danger of speaker damage due to overdriving.  
In addition, the amplifiers’ gain and frequency re-  
sponses are individually hand-trimmed to compen-  
sate for typical manufacturing tolerances between  
the drivers and produce a smooth frequency  
response from 40 Hz to 20 kHz.  
4
MR8  
 
AN EXTREMELY IMPORTANT NOTE  
ON MR8 BASS RESPONSE AND  
YOUR CONTROL ROOM.  
QUICK START  
We realize that you can’t wait to hook  
up your new Mackie MR8 Studio  
Monitors and try them out. Neverthe-  
less, please take the time to read this  
page NOW, and the rest can wait until  
you’re good and ready.  
Your new MR8s achieve their best bass  
response in a room that’s optimized  
for bass reproduction. A lot of fac-  
tors can conspire to thwart the MR8s’  
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.  
3. Leave the High Freq [3] and Low Freq [4] Filter  
switches at their Normal positions.  
4. Connect the line-level monitor signal from your mixer,  
preamp, or other signal source to the INPUT [1] jack  
on the MR8 Studio Monitor (1⁄4-inch PHONE, XLR, or  
RCA).  
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 cor-  
responding to the markings next to the IEC socket.  
6. Start your signal source (tape deck, CD, DAW, or  
whatever), but leave the master volume control on your  
mixer or preamp down.  
7. Turn on the power switch [5] on the MR8. The power  
LED [8] on the front panel will illuminate.  
Low-Frequency Response  
When you put your MR8s 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.  
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.  
8. Slowly turn up the INPUT LEVEL [2] control on the  
back of the monitor to its fully clockwise position  
(MAX).  
9. Adjust the master volume on your mixer or preamp to  
a comfortably loud listening level. If the MR8 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.  
High-Frequency Response  
The MR8s are designed to provide a smooth frequency  
response throughout the mid and high range. Neverthe-  
less, 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.  
Enjoy the silky smooth highs and authoritative, com-  
manding lows of the MR8. Then read the rest of this  
manual.  
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 MR8  
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.  
• Save your sales receipt in a safe place.  
Also record all MR8 serial numbers in the space provid-  
ed on page 3, along with where and when you bought them.  
5
Owner’s Manual  
 
REAR PANEL DESCRIPTION  
This is where you connect your signal to the monitor,  
ꢀ. INPUT LEVEL  
and make adjustments to the frequency response of  
the speakers to match the monitor’s location and your  
room’s environment.  
The MR8 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.  
1. SIGNAL INPUTS  
• The MR8 is 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.  
There are three types of input connectors: XLR (bal-  
anced), 1/4-inch (balanced), and RCA (unbalanced).  
Since all three of them are connected together electri-  
cally, do not connect more than one signal at a time to  
the input jacks.  
ꢁ. HIGH FREQUENCY FILTER  
• The XLR connector and 1/4-inch TRS (tip-sleeve-ring)  
connector accept a balanced signal while the RCA con-  
nector 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).  
The HIGH FREQ 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  
speakers.  
• Perhaps you have hearing loss caused by too many  
nights in front of a double Marshall stack.  
• The 1/4-inch TRS jack can also accept an unbalanced  
signal from a 1/4-inch TS (tip-sleeve) plug.  
The connectors are wired as follows (per the AES/IEC  
standard):  
You just like to mix on the bright side or dull side.  
If your mixes consistently sound dull or dark when  
you listen elsewhere, this usually indicates that your  
monitors are too bright, relative to your normal hearing.  
A bit less high-frequency energy usually fixes this, and  
you can force the mix in this direction by reducing the  
high-frequency output of the monitors by using the –2 dB  
position of the switch.  
XLR  
TRS  
RCA  
Hot (+)  
Cold (–)  
Shield (Ground)  
Pin 2  
Pin 3  
Pin 1  
Tip  
Ring  
Shield Shield  
Tip  
See Appendix B: Connectors, for more information on  
these connectors.  
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)  
6
MR8  
 
Conversely, if your 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  
Use this switch to turn on or off the MR8. When the  
power switch is turned on and the MR8 is plugged into  
an AC outlet, the power LED on the front of the monitor  
lights up to let you know the MR8 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.  
6. Mains Input and Fuse  
Connect the power cord to this IEC socket securely,  
and plug the other end into your AC outlet. Make sure  
the AC outlet has the correct voltage indicated next to  
the IEC socket.  
Get that sound level meter out. Decide what level  
you’re going to mix at and use the meter to help keep  
you mixing at that level. Your ears will thank you, and  
your mixes will be better for it.  
The fuse is located behind the fuse cover, at the bot-  
tom of the IEC socket. See the “Troubleshooting” section  
on page 9 for information about replacing the fuse.  
4. LOW FREQ FILTER  
The LOW FREQ switch tailors the overall low-frequency  
response by +2 dB or +4 dB at 100 Hz.  
7. Bass Reflex Port  
• For most applications, use the “0 (NORMAL)” setting.  
This takes the equalization circuit out of the signal path.  
• If you want or need just a little extra low-frequency  
output, use the +2 dB setting.  
• If you want or need more low-frequency output, 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.  
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 MR8 is  
turned on and AC power is available at the  
mains input [6].  
7
Owner’s Manual  
 
PROTECTION CIRCUITS  
There are several protection mechanisms designed  
into the MR8 to safeguard the loudspeakers and ampli-  
fiers 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  
MR8.  
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  
• For balanced signals, foil shielded cables, such as  
Belden 8451, 8761, or 9501 are commonly used for  
studio wiring.  
(i.e., excessive distortion), you can still damage the  
speakers in the MR8 by overdriving them. Such damage  
is beyond the scope of the warranty.  
• 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 60 Hz just prior to  
the low-frequency amplifier prevents very low frequen-  
cies from being amplified. Excessive low-frequency  
energy below 60 Hz can damage the woofer by causing it  
to “bottom out,” also known as overexcursion, which is  
equivalent to a mechanical form of clipping.  
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 MR8, 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 MR8! Speaker levels are much  
higher than line levels and can damage  
the input circuitry in the MR8.  
Thermal Protection  
All amplifiers produce heat. The MR8 is designed to  
be efficient both electrically and thermally.  
• If for some reason the heatsink gets too hot, a thermal  
You can, however, insert a speaker-level to line-level  
switch activates and turns off the amplifier. This protec- signal attenuator between the receiver’s speaker output  
tion 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.  
and the MR8’s input. Your Mackie dealer may be able to  
help you find one, or you can build your own.  
• When the heatsink cools down to a safe temperature,  
the thermal switch resets and normal operation re-  
sumes.  
• 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. If the ambient air temperature is very warm,  
try pointing a small fan toward the heatsink to increase  
the airflow through the ventilation holes.  
CARE AND CLEANING  
Your Mackie Reference Studio Monitors will provide  
many years of reliable service if you follow these guide-  
lines.  
• Avoid exposing the monitors to moisture.  
• Avoid exposure to extreme cold (below freezing tem-  
peratures).  
• Use a dry cloth to clean the cabinets. Only do this when  
the power is turned off.  
Integrated Magnetic Shielding  
The MR8 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 particu-  
larly sensitive computer monitor or TV screen, it may be  
necessary to move the speakers a few inches away.  
8
MR8  
 
Appendix A: SERVICE INFO  
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 illumi-  
nated? 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 immedi-  
ately precedes the studio monitor) is high enough to  
produce sound.  
do your best to confirm the problem. Visit the 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 prod-  
uct 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  
lamp).  
• Is the power [5] switch on the rear panel in the ON  
position?  
• Is the power indicator [8] on the front panel illumi-  
nated? 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 MR8 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 discon-  
necting 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.  
• 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.  
• Excessive hiss is an indication of an incorrect gain set-  
ting somewhere before the speaker.  
115 VAC unit: 3.15 amp slo-blo (T 3.15 AL/250V)  
230 VAC unit: 1.6 amp slo-blo (T 1.6 AL/250V)  
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.  
• If possible, listen to the signal source with headphones  
plugged in. If it sounds noisy there, it’s not the monitor.  
9
Owner’s Manual  
 
Repair  
For warranty service, please refer to the warranty  
information on page 15.  
Non-warranty service for Mackie products is avail-  
able at a factory-authorized service center. To locate  
your nearest service center, visit www.mackie.com, click  
“Support” and select “Locate a 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 distribu-  
tors.  
Need help with your new MR8?  
FAQs, manuals, and addendums.  
Email us at: [email protected].  
Telephone 1-800-898-3211 to speak with one of our splendid  
10  
MR8  
 
Appendix B: CONNECTORS  
XLR Connectors  
1/4" TS Phone Plugs and Jacks  
XLR connectors are used to make balanced connec-  
tions to the MR8. They are wired as follows, according  
to standards specified by the AES (Audio Engineering  
Society).  
“TS” stands for Tip-Sleeve, the two connections avail-  
able on a mono 1/4" phone jack or plug. They are used  
for unbalanced signals. It is okay to connect an unbal-  
anced 1/4" phone plug into the 1/4" TRS phone jack on  
the MR8.  
2
SHIELD  
HOT  
SLEEVE  
SLEEVE  
TIP  
1
3
COLD  
TIP  
TIP  
SHIELD  
1
SLEEVE  
3
COLD  
2
HOT  
SHIELD  
COLD  
HOT  
1/4" TS Unbalanced Wiring:  
Sleeve = Shield  
Tip = Hot (+)  
1
3
2
XLR Balanced Wiring  
Pin 1 = Shield  
Pin 2 = Hot (+)  
Pin 3 = Cold (–)  
RCA Plugs and Jacks  
RCA-type plugs (also known as phono plugs) and  
jacks are often used in home stereo and video equip-  
ment and in many other applications. They are unbal-  
anced and electrically equivalent to a 1/4" TS phone  
plug.  
1/4" TRS Phone Plugs and  
Jacks  
TIP  
SLEEVE TIP SLEEVE  
“TRS” stands for Tip-Ring-Sleeve, the three connec-  
tions available on a stereo 1/4" or balanced phone jack  
or plug. TRS jacks and plugs are used to make balanced  
connections to the MR8.  
RCA Unbalanced Wiring:  
Sleeve = Shield  
Tip = Hot  
RING SLEEVE  
SLEEVE RING TIP  
TIP  
RING  
TIP  
SLEEVE  
1/4" TRS Balanced wiring:  
Sleeve = Shield  
Tip = Hot (+)  
Ring = Cold (–)  
11  
Owner’s Manual  
 
Appendix C: TECHNICAL INFORMATION  
MR8 Specifications  
Acoustic Performance  
Equalization  
Free Field Frequency Response:  
Low Frequency EQ:  
+2 dB/+4 dB @ 100 Hz, shelving  
2 dB @ 5 kHz, shelving  
40 Hz – 20 kHz ( 3 dB)  
High Frequency EQ:  
Lower Cutoff Frequency:  
Upper Cutoff Frequency:  
–3 dB @ 60 Hz  
–3 dB @ 22 kHz  
AC Power Requirements  
US:  
120 VAC, 60 Hz  
240 VAC, 50 Hz  
Sound Pressure Level @ 1 meter, +4 dBu into Balanced Input:  
100 dB SPL @ 1m  
Europe:  
Korea:  
Japan:  
220 VAC, 60 Hz  
Maximum SPL Per Pair:  
116 dB SPL @ 1m  
100 VAC, 50/60 Hz  
Note: The MR8 does not support multiple voltage configura-  
tions. Make sure the voltage rating for your particular model  
(as indicated on the rear panel near the IEC socket) corre-  
sponds with your local AC mains voltage.  
Transducers  
Low Frequency:  
8 in/203 mm steel frame  
cone woofer with rubber surround  
High Frequency:  
Wave guide loaded 1 in/25 mm silk  
dome tweeter  
AC Connector:  
Fuse:  
3-pin IEC 250 VAC, 16 A male  
115 VAC: T 3.15AL/250V  
230 VAC: T 1.6AL/250V  
Amplifiers  
Power Consumption:  
100 watts with music, loud mix  
20 watts quiescent (idle)  
Low Frequency Power:  
100 watts, 4 ohm load  
200 watts peak  
High Frequency Power:  
50 watts, 4 ohm load  
100 watts peak  
Physical Dimensions and Weight  
Slew Rate:  
> 15 V/µs  
Enclosure:  
0.625 in/16 mm thick MDF with  
0.750 in/19 mm MDF front panel  
Distortion (THD, SMPTE IMD, DIM 100):  
< 0.035%  
Signal-to-Noise Ratio:  
Damping:  
Adiabatic foam  
Dimensions:  
Low Frequency: > 101 dB, 20 Hz to 20 kHz,  
unweighted, referenced to 100 watts into 4 ohms  
High Frequency: > 93 dB, 20 Hz to 20 kHz,  
unweighted, referenced to 50 watts into 4 ohms  
Height:  
15.75 in/400 mm  
16.00 in/406 mm including top of  
waveguide  
Width:  
Depth:  
Weight:  
10.85 in/276 mm  
13.60 in/346 mm  
27.6 lb/12.5 kg  
High-Frequency Type:  
Monolithic IC, Class AB with  
DMOS power stage  
Low-Frequency Type:  
Discrete bipolar Class AB  
Electronic Crossover  
Crossover Type:  
24 dB/octave  
Disclaimer  
Crossover Frequency:  
Sensitivity:  
3 kHz  
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.  
+4 dBu at 300 Hz for full output  
Input Impedance:  
20 kΩ, balanced bridging;  
10 kΩ unbalanced  
13.60" (346 mm)  
10.85" (276 mm)  
MR8  
WEIGHT  
27.6 lb  
(12.5 kg)  
16.00"  
(406 mm)  
15.75"  
(400 mm)  
1ꢀ  
MR8  
 
MR8 Block Diagram  
+HI VDC  
RCA  
UNBALANCED  
LINE INPUT  
HI-FREQUENCY  
DRIVER  
HI-FREQUENCY  
POWERAMPLIFIER  
HIGH FREQ  
CROSSOVER  
+2 dB  
0
–2 dB  
HI-FREQ  
LO-FREQ  
XLR  
BALANCED  
LINE INPUT  
2
3
TWEET  
1
INPUT LEVEL  
1/4"  
UNBALANCED  
LINE INPUT  
–HI VDC  
+HI VDC  
DARK SIDE  
OF THE MOON  
LO-FREQUENCY  
POWERAMPLIFIER  
LO-FREQUENCY  
DRIVER  
OVEREXCURSION  
LOW FREQ  
PROTECT  
+4 dB  
+2 dB  
0
WOOF  
60 Hz  
–HI VDC  
POWER  
FUSE  
POWER  
LED  
+
HI VDC  
+
TOROIDAL POWER  
TRANSFORMER  
LO VDC  
MACKIE  
MR5  
BLOCK DIAGRAM  
08.29.07  
The following are trademarks or registered trade-  
marks of LOUD Technologies Inc.: The Mackie logo, MR  
Series, Zero Edge Baffle, and the Running Man.  
This manual also contains names and marks of other  
companies that belong to those respective companies,  
and are hereby acknowledged.  
©2009 LOUD Technologies Inc. All Rights Reserved.  
1ꢁ  
Owner’s Manual  
 
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  
MR8  
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  
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  
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  
Fax: 425.487.4337 • www.mackie.com  

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