MCM Custom Audio 50-14000 User manual

Installation Manual
In-Ceiling
Speaker Pairs
Model 50-14000, 50-14005
50-14010, 50-14015
General Features
•Polypropylene cone woofer
•Rubber surround
•1/2" polymer dome tweeter
•Color coded push terminal strips
Specifications
Model 50-14000 50-14005 50-14010 50-14015
Woofer Size 4" 5.25" 6.5" 8"
Tweeter 1/2" polymer 1/2" polymer 1/2" polymer 1/2" polymer
Crossover HP capacitor 6dB/octave 6dB/octave 6dB/octave
Power Capacity
(RMS/Peak) 20W/30W each 25W/50W each 30W/60W each 40W/80W each
Frequency Response 50Hz~20KHz 45Hz~20KHz 45Hz~20KHz 30Hz~20KHz
Nominal Impedance 8ohm 8ohm 8ohm 8ohm
SPL (W/M) 88dB 89dB 89dB 90dB
Dimensions
Overall Frame Diameter 6.73" 7.95" 9.02" 10.71"
Required Cutout 5.39" 6.49" 7.60" 9.29"
Mounting Depth 2.45" 2.56" 2.91" 3.03"
Warranty
MCM Custom Audio and Stellar Labs products are warranted, by MCM Electronics, against manufacturer defects for a
period of two years from the original date of purchase. This warranty is limited to manufacturer defects, in either
materials or workmanship. MCM Electronics, or any other worldwide divisions of Premier Farnell PLC, are not responsible
for any consequential or inconsequential damage to any other component, structure or the cost of installation or removal
of said items.
For questions or specific information regarding warranty replacement or repair, contact:
MCM Custom Audio
Division of MCM Electronics
650 Congress Park Drive
Centerville, Ohio 45459
www.mcmelectronics.com
© 2010 MCM a Premier Farnell Company

Speaker Placement
Careful consideration should be made when determining the desired location of the speaker pair. As these are referred to as ceiling
speakers, this is the intended mounting location. However, there is no electronic or physical reason these cannot be mounted in other
locations. Note that careful consideration should be given to appearance in these situations.
Following are some typical guidelines that should be followed when determining the optimum placement for speakers in a given
environment. Note that these are guidelines. Aesthetics, light fixtures, ceiling fans and similar items will also require consideration, and
should be considered equally important to the recommendations below.
Given a typical rectangular room, the ideal ceiling placement for these speakers is depicted below. When installing a single pair of speakers
in a given room, bisect the room in both the long and short dimensions. This will provide an exact center point. Then along the long
length, bisect each half. Where each of these bisected lines cross the center point, is the optimum speaker location.
When installing four speakers, bisect each short half one additional time. As depicted below, the room will be divided into 16 equal
rectangles. Place the speakers as shown.
Speaker Wire
It is important that good quality wire is used in the installation. Installed speakers generally have much longer wire runs than normal home
theater speakers, hence heavier gauge wire is recommended. Note: There are numerous manufactures in the market offering “high-end”
esoteric speaker wire, with claims of exotic materials and superior performance. Truthfully, this type of product has been found to provide
little or no benefit to installations of this type. Good quality 16AWG CL2 rated in-wall wire, available from MCM Electronics, provides
outstanding performance in this application.
When running this cable, a few simple guidelines must be followed
•All speakers should be home-run. That is, wire should be run directly from each speaker, back to the sound source
•Speaker wire should be kept away from AC wiring to prevent noise. If AC wiring and speaker wire must cross paths, it is best
to have them cross at a 90º angle, minimizing the common surface area between the two
•Speaker wire and AC lines should NEVER pass through the same hole in studs or joists
Installation
1. For this type is installation, a stud finder such as MCM #22-9346 is highly recommended. This device will not only accurately
located both edges of the stud, but will provide a warning of nearby electrical wiring.
2. When deciding on a final location to install speakers, extreme care should be taken to ensure that obstructions do not exist,
such as air ducts, plumbing and electrical wiring.
3. Locate the studs in the wall between which the speaker will be mounted. Using a pencil, mark a spot directly in the center of
the two studs
4. Locate the cardboard mounting template, included with the speaker, and using a tape measure, determine its exact center
point.
5. Poke a small hole in the template, and place the template on the wall, lining up the hole with the spot marked on the ceiling.
Using a level, make sure the template is level and plumb on the wall.
6. Trace the outer perimeter of the template with a pencil.
7. Using a wallboard saw, similar to MCM #22-7597, cut around this circumference. This type of saw is especially useful, as its
rigid design and sharp point allow it to “plunge” into the wall with no need to drill a pilot hole.
8. Remove the rectangular section of drywall from the wall.
9. Remove the front grille from the speaker to be installed. This is most easily accomplished by rotating the plastic mounting clips
outward, and pressing then towards the front speaker frame. This will cause the screw heads, behind the grill, to push the grill
out from inside. In some cases, it may be necessary to gently pry the grill from the front. This may be done with a small knife
blade or micro size flat blade screwdriver. In this case, extreme care should be taken not to damage the plastic frame around
the grill.
10. When looking at the rear of the speaker, rotate the four mounting clips clockwise as far as they well go, so as not to obstruct
the frame. If necessary, loosen the four mounting screws, from the front of the speaker, to allow these clips to rotate freely
within their bracket.
11. Locate the green terminal strip on the rear of the speaker, connections marked ( – ) and ( + ). This is a two-part terminal strip,
with the screw terminals being detachable from the PC board. Unplug the screw-connector portion of the strip, allowing easy
access to the screws. Strip ¼" of insulation from the end of the speaker wire, insert into the terminal strip, and tighten the
screws. Take care to observe correct polarity. Then plug the terminal strip back into the PC board on the rear of the speaker.
12. Fully insert the speaker into the wall opening and begin to tighten the four mounting screws. Care should be taken when
tightening these screws. Make sure the screwdriver is secure in the head of the screw and does not slip out and damage the
speaker cone.
13. As screws are tightened, the plastic mounting clips will rotate clockwise and draw in against the inside of the wallboard. If
using a drill to tighten screws, tighten all four until the speaker frame just makes contact with the ceiling. From there, it is best
to use a hand screwdriver to fully tighten. This will prevent breakage of the plastic mounting clips.
14. Once all screws are tightened, the grill may be reinstalled on the front of the speaker.
15. The other end of the speaker wire is now ready for connection to the sound source