MCM Custom Audio 50-6370 User manual

In-Wall Speaker
Installation Manual
Model #50-6370
MCM an InOne company
650 Congress Park Drive
Centerville, Ohio 45459
www.mcminone.com
© 2003 MCM an InOne company

Introduction
Ideal as main speakers, surround sound or remote speaker applications, these
are also an excellent choice for use with a subwoofer. Two-way design includes
a 6dB crossover, polymica cone woofer and 1" soft dome tweeter, for high
frequency response up to 20KHz. White plastic frame and painted steel grill
compliments any decor. Attached mounting brackets easily mount to wall board
without the need for additional hardware.
General Features
•5-1/4" poly mica cone woofer
•1" soft pivotal tweeter
•6dB/octave crossover
Specifications
•Power Capacity: 25W/60W RMS/peak
•Frequency Response: 60Hz~20KHz
•Nominal Impedance: 8Ω
•SPL: 90dB W/M
Dimensions
•Overall Frame: 11” (H) x 7-5/8” (W)
•Required cutout: 9-5/8” (H) x 6-1/2” (W)
•Mounting depth: 2-1/4”

Installation
Speaker Placement
Careful consideration should be made when determining the desired location of the speaker pair.
As this Model #50-6370 is referred to as an in-wall speaker, this is the intended mounting
location. However, there is no electronic or physical reason these cannot be mounted in ceilings
or other locations.
In an “ideal” environment, the left and right speakers should be placed on the same wall, 6’ to 8’
apart, at the same distance from opposite corners. The mounting height should be that which
places the tweeters at eye level to the listeners. It should be noted that often times, the listeners
may be seated. Since many rooms do not offer the “ideal” environment, slight variations to this
may be made. As proximity to corners has a significant effect on low frequency response, priority
should be given to locating speakers the same distance to corners. As these speakers are
rectangular in shape, they may be mounted either vertically or horizontally. In situations were
they are horizontal, the tweeters position should be mirror images of each other (either both in, or
out).
It is important to note that more speakers in a given listening area do not necessarily equate to
higher sound levels. With more speakers, the desired listening level for a given area is attained
with lower output from each speaker. This creates a much more pleasant listening environment
as the sound source can be uniformly heard through the entire room, regardless of location and
with less interference with sounds such as conversation.
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 14AWG CL3 rated in-wall wire, such as MCM #24-5790 (two-conductor), #24-5835 (four-
conductor) or similar, provide 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

Part 1
New Construction Installation
1. This initial step should be completed after all structure framing is completed, and prior to
drywall installation. In this instance, a Pre-Construction Bracket Kit, such as MCM #50-
6680 (sold separately) must be utilized. These brackets mount to wall studs, and in
conjunction with drywall, provide a solid mounting base for the speaker. Compatible with
wood or metal studs spaced at standard 16” centers, the kit also includes extension rails
for studs mounted on 24” centers.
2. When positioning the pre-construction bracket between the studs, added care should be
taken to ensure that the bracket is level. A standard bubble level, such as MCM #22-
7572 or similar, model is essential to achieving this.
3. Centering the speaker opening between the studs, mount the Pre-Construction Bracket
to the studs.
4. If installing the speakers high on the wall, be sure to leave sufficient wire length at the
speaker end to reach to almost the floor. This greatly adds safety, as the speaker may
then be connected to the wire while standing on the floor instead on top of a ladder. Coil
the speaker wire and staple to the side of the stud above the bracket. Take care to
ensure that it does not interfere with drywall installation.
5. Once the drywall has been installed, a 9-5/8” (H) x 6-1/2” (W) opening should be cut to
match the hole in the pre-construction bracket. In most cases, the drywall installer will do
this at the same time that openings are cut for light switches, outlets and ceiling fixtures.
1. Skip directly to Part 2
Installation in Completed Structures
1. For this type is installation, a stud finder such as MCM #22-6840 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 in-wall speakers, extreme care should be
taken to ensure that obstructions do not exist, such as air ducts, plumbing and electrical
wiring.
3. Locate the wall studs between which the speaker will be mounted. Using a pencil, mark
a spot directly in the center of the two studs
4. Locate the rectangular 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 wall. At this stage, it is helpful to use masking or similar tape
to temporally attach the template to the wall. Using a standard bubble level, such as
MCM #22-7572 or similar, make sure the template is in proper position on the wall, and
lightly trace its outer edge with a pencil.
6. Remove the template, and using a wallboard saw similar to MCM #22-7597, cut along the
pencil mark. 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. When you have cut the
length of each edge, remove the saw, and start a new line, opposite the last cut edge.
This will ensure much cleaner cuts at the corners.

Part 2
1. Remove the front grille from the speaker to be installed. This is most easily
accomplished by rotating the six plastic mounting clips outward, pressing them 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.
2. Rotate the six mounting clips so they are flat against the side of the rear speaker
enclosure. If necessary, loosen the mounting screws, from the front of the speaker, to
allow these clips to rotate freely within their bracket.
3. Attach the speaker wire to the ( – ) and ( + ) connections on the rear of the enclosure.
Take care to observe correct polarity.
4. Fully insert the speaker into the wall and begin to tighten the 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.
5. 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 six until
the speaker frame just makes contact with the wall. From there, it is best to use a hand
screwdriver to fully tighten. This will prevent breakage of the plastic mounting clips.
6. In an alternating cross pattern, (center left, center right, top left, bottom right, top right,
bottom left) tighten all six screws, by hand, until the speaker frame is snug against the
wall. Take care not to over-tighten as this may damage the mounting clips or the
mounting frame.
7. Once all screws are tightened, the grill may be reinstalled on the front of the speaker.
8. The other end of the speaker wire is now ready for connection to the sound source
Warranty
MCM Custom Audio products are warranted against manufacturer defects for a period of 12
months from the original date of purchase. This warranty is limited to manufacturer defects, in
either materials or workmanship. MCM an InOne company, 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.
This warranty will not cover damage due to improper use such as (an not limited to) damaged
cones, mounting frames, voice coils or items damaged by whether damaged items.
For questions or specific information regarding warranty replacement or repair, contact:
MCM, an InOne company
www.mcminone.com
800-543-4330