MTX Audio Speaker System MP42B MP42W User Manual

MODEL MP42B/MODEL MP42W  
Owners Manual  
4545 E Baseline Rd  
Phoenix AZ 85040  
Phone: (602)438-4545  
Fax: (602)438-8692  
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SPECIFICATIONS  
INTRODUCTION  
About the MP42 Multi Purpose Speaker  
Frequency Response  
110-20kHz  
The MTX MP42 may be the most comprehensive  
loudspeaker design ever conceived. The unparalleled  
application flexibility afforded by this design gives you the  
freedom to listen to music almost anywhere and in just  
about any possible configuration.  
Impedance  
8 Ohms  
Power Handling  
Total Power Handling  
Sensitivity  
50 Watts RMS  
Features  
200 Watts  
•Balanced Dome Tweeter  
Extended high frequency response is achieved through the  
use of an integrated balanced dome tweeter. This particular  
design offers the efficiency of a cone type tweeter with  
the wide dispersion pattern of a dome. The tweeter is  
also magnetically shielded to minimize color distortion when  
used as a home theater system center channel or front main  
speaker.  
88dB @ 1W/1m  
4” Shielded  
Woofer  
Tweeter  
1/2” Shielded Balanced Dome  
12.625”H x 4.812”W x 4.937”D  
•Dual 4Woofers  
Dimensions  
The mineral filled polypropylene cones and butyl rubber  
surrounds of the MP42 are combined with a computer  
optimized magnetically shielded motor structure and long  
wind voice coils to provide extended low bass response. The  
MTM design allows the dual woofers to mesh perfectly with  
the balanced dome tweeter to provide excellent frequency  
response characteristics, both on and off axis, across the  
majority of the audible frequency spectrum.  
Specifications subject to change without notice.  
•Weather Resistant Design  
All of the material used in the construction of the Model  
MP42 were chosen for their environmental stability as well  
as their sonic characteristics.  
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MP42 PARTS GUIDE  
MP42 SET UP GUIDE  
HOME THEATER  
7
4
3
1
Left/Center/Right Front Speaker Height  
One of the most Important parameters for the left/center/  
right/front speakers in a home theater system is height.  
Figure 2 shows the ideal arrangement of the speakers in  
relation to the viewing screen: all three speakers are aligned  
on the same horizontal plane. This establishes a firm image  
height when special audio effects are planned from one  
side to the other, such as a speeding car moving across  
the screen. When a large discontinuity occurs between the  
heights of the center front channel and the left/right front  
speakers, as depicted in Figure 3, the visual image of the  
moving object becomes confused and somewhat unnatural  
due to shifts in image height.  
6
B
A
9
8
2
7
3
5
Figure 2 Proper placement of left/center/right front speakers.  
1. Input Terminals  
2. Threaded Inserts  
3. Brass Thumb Screws  
4. Aluminum Bracket  
5. Self Adhesive Cabinet Feet  
6. B-Type Bracket Mount End Cap  
7. A-Type Standard End Cap  
8. Grill  
9. Grill Adhesive  
Figure 3 Improper placement of left/center/right front speakers.  
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MP42 SET UP GUIDE  
HOME THEATER  
MP42 CONFIGURATION GUIDE  
CENTER CHANNEL  
Remove the B-Type end caps, brass thumb screws, and  
aluminum mounting bracket. Replace the brass thumb  
screws in each end of the cabinet and snap A-Type end  
caps into place. Then simply place the self adhesive cabinet  
feet in the appropriate locations to protect the MP42 cabinet  
and whatever surface that it will set on.  
Typical Loudspeaker Placement  
Figure 1 illustrates the most generally accepted speaker  
locations for a home theater system. Although there are  
an infinite number of set up options using Figure 1 as  
a template will certainly provide a great starting point.  
Experimentation with slightly different speaker locations may  
provide improved performance in your specific listening  
environment.  
The front left and right speakers should form a 45 degree  
triangle using the center starting seating position as the  
apex.  
The surround speakers should be placed beside the  
listening area, and pointed towards each other. It is also  
recommended that the speakers be 2-3 feet above the  
listeners head.  
CENTER  
FRONT  
RIGHT  
FRONT  
LEFT  
FRONT  
A-TYPE  
CAP  
A-TYPE  
CAP  
SELF ADHESIVE  
CABINET FEET  
SUBWOOFER  
(OPTIONAL)  
45  
LEFT  
REAR  
RIGHT  
REAR  
LISTENING AREA  
Figure 1 Typical loudspeaker placement in a home theater system.  
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MP42 CONFIGURATION GUIDE  
BOOKSHELF  
WIRING  
Connecting the Speakers to Your System  
Remove the B-Style end caps, brass thumb screws, and  
aluminum mounting bracket. Replace the brass thumb  
screws in each end of the cabinet and snap A-Type end  
caps into place. Then simply place the self adhesive cabinet  
feet in the appropriate locations to protect the MP42 cabinet  
and whatever surface that it will set on.  
Though there are many sizes of speaker wire available.  
MTX recommends using 18 gauge or heavier wire to  
connect your loudspeakers to your amplifier or receiver.  
Before cutting the speaker wire to the proper lengths, be  
sure to leave an extra two or three feet of surplus wire, just  
in case you have to move the components around. Using  
a wire cutter or sharp knife, strip off about half an inch of  
insulation from both ends. Twist the exposed wires to make  
them easier to insert in the speaker terminals. Make sure  
that you unplug your amplifier or receiver before proceeding  
any further.  
A-TYPE  
CAP  
When using the MP42 as a center channel or surround  
speaker follow the hook-up directions included with your  
surround processor.  
It is essential that you connect your two speakers “in phase”.  
To do so, first take note of the code used on the speaker  
wire to differentiate between the two wires that run through  
it.  
To wire your speakers in phase, make sure the positive (+)  
terminals on the back of your receiver are connected with  
the red terminals on the back of your loudspeakers, and the  
negative (-) terminals on the receiver are connected with the  
black terminals on the speakers (see diagram). Note that  
negative (-) terminals on the receiver may also be marked  
“common” or “ground” (GND).  
Be certain that no stray strands of wire cross from one  
terminal to another on either speaker or receiver. This could  
result in a damaging short.  
A-TYPE  
CAP  
+
-
+
-
SELF ADHESIVE  
CABINET FEET  
5
10  
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PAINTING  
MP42 CONFIGURATION GUIDE  
FLOOR STAND  
Carefully remove the spring clip on the back of the grill logo  
and remove the logo. Mask the baffle area of the speaker  
cabinet out to the grill mounting groove. If you are going to  
mount the MP42 using the supplied wall bracket it is best  
to also mask off the foam rubber bracket gaskets at the top  
and bottom of the speaker cabinet. Almost any type of  
paint can be used but best results will be had using a  
quick drying enamel or lacquer spray paint. For best results  
always follow the paint manufacturers recommendations  
for proper application. After painting the cabinet, grill and  
applicable end caps allow the paint to dry thoroughly.  
Remove the B-Type end caps, brass thumb screws, and  
aluminum mounting bracket. Replace the brass thumb  
screws in the top of the cabinet and snap an A-Type  
end cap into place. Then simply mount the MP42 to the  
recommended Studio Tech S1 stands using a 1/4-20 1” long  
hex head bolt. (Not Included)  
A-TYPE  
CAP  
GRILL ASSEMBLY  
Place the four grill adhesive strips in the groove located at  
the outer rim of the baffle. Carefully snap the grill into place  
and rotate the logo for proper orientation.  
STUDIO TECH  
S1 STANDS  
RECOMMENDED  
1/4-20  
1” LONG  
BOLT  
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MP42 CONFIGURATION GUIDE  
MP42 CONFIGURATION GUIDE  
BRACKET MOUNTING  
BRACKET MOUNTING  
1) Remove the B-Type end caps, brass thumb screws, and  
aluminum mounting bracket.  
ALUMINUM  
BRACKET  
B-STYLE  
CAP  
2) Hold the bracket up to the desired mounting surface.  
Being careful to leave enough space for tightening the  
brass thumb screws and installing the B-Type end caps.  
Please Note: Although the speaker can be mounted either  
horizontally or vertically, the MTM type of design used in the  
MP42 will produce a more evenly distributed sound through  
out the listening area if mounted vertically.  
BRASS  
THUMB  
SCREW  
3 Use a level or measuring tape to insure that the bracket is  
square with its surroundings.  
4) Mark the locations of the bracket mounting screw holes.  
5) Drill pilot holes (if required) into the mounting surface.  
6) Pull the speaker wire through the center hole in the  
bracket.  
7) Attach the bracket to the mounting surface. Please  
Note: The MP42 weighs approximately 6 pounds, use only  
hardware that will support this type of load.  
8) Slide the MP42 cabinet into the mounting bracket and  
secure with the two brass thumb screws.  
BRASS  
THUMB  
SCREW  
9) Adjust the MP42 cabinet for the desired angle and tighten  
the thumb screws.  
B
B-STYLE  
CAP  
10) Attach the B-Type end caps by inserting the cap  
mounting tab into the slot in the back of the speaker baffle.  
Then snap the cap down onto the brass thumb screws.  
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