OEM Systems SE-LCR KE, PS-525 LCRS, AP-525 LCRS User Manual
For all Dual 5-1/4" LCR In-Wall Loudspeakers
Rectangular In-Wall Loudspeakers
INSTALLATION GUIDE
Congratulations! You have purchased a high quality stereo
loudspeaker. When matched to comparable electronic
equipment, expect years of quality high delity sound. We
are constantly striving to provide the very best technology
has to offer.
The following manual is designed to give you, the installer
or owner, basic information as to the speaker’s installation
and operation. It is beyond the scope of this manual to go
into all the details that must be taken into consideration in
a sophisticated high delity system. When installing the
wiring and speakers it is important to adhere to all local
codes and regulations. Consulting a professional will help
to maximize your system’s performance.
If you have any questions that are not answered by this
manual, contact your local dealer for assistance. For the
most current information please visit:
www.oemsystems.com.
GENERAL DESCRIPTION
These two-way speakers have specially designed woofers
with linear long throw butyl rubber surrounds for long life
and superior damping. Pivoting Dome Tweeters are utilized
for excellent high frequency dispersion throughout your
entire listening environment.
SHIPPING DAMAGE
Each speaker is thoroughly tested before it leaves the
factory. However, in shipment, accidents may occur. Please
inspect your speakers carefully when you receive them to
make sure there is no damage. If there is, please notify
your dealer, or supplier immediately for assistance. If you
received your speakers by public transportation, report the
damage at once to the shipping company.
AMPLIFIER OPERATION
These speakers will perform well with ampliers from 5 to
125 Watts RMS. However, damage to the speakers can be
done by ampliers of nearly any power rating if the amplier
is overdriven into clipping. “Amplier clipping” is a phrase
used to describe a condition when, because of the volume
demand, an amplier is being asked for more power than
it can give. Clipping causes distortion of the audio signal.
If you should hear an unusual amount of distortion at high
listening levels then consider reducing the volume. DAMAGE
DONE TO A SPEAKER BY CLIPPING IS NOT COVERED UNDER
THE WARRANTY.
SPEAKER PLACEMENT
Placement of In-wall Speakers should be carefully
considered. Please contact a professional for
assistance if you are uncomfortable with the planning or
installation process.
Ideally, the speakers should be located where they will provide
the best possible sound and ease of installation. It is beyond
the scope of this publication to discuss all of the various
aspects of speaker placement but here are some suggestions
that should be helpful. For more bass, place the speakers
between 18 and 36 inches from an adjacent wall as measured
to the center of the speaker. Avoid placing the speakers less
then 18 inches from an adjacent wall. When placing speakers
near a corner, avoid locating them an equal distance from the
two adjacent walls.
When used in a home theater the front left and right speakers
should be separated from each other a distance of 0.8 to 1.2
times the seating distance (assuming they are on the same
plane as the center speaker). For example, if the seating
position is 10 feet from the viewing screen and/or center
speaker then ideally the distance between the left and right
speakers should be somewhere between 8 and 12 feet, (10 x
1.2ft = 12ft). MTM style speakers are best installed in portrait
orientation. However, landscape is often used for the center
speaker for aesthetic or clearance purposes. If the speakers
are located behind an acoustically transparent screen then
all the speakers should be oriented portrait style. Aiming
the pivoting tweeter toward the listening area will add a little
brilliance by raising the amplitude of the highest frequencies
(>12kHz). Aim the tweeter by pressing the lens area along
side the tweeter dome.
WIRING
To achieve maximum performance from your new speakers
we strongly suggest the use of good quality stereo cable.
There are many good brands available. We recommend that
the cable be at least 16 gauge or larger for runs of over 50 feet
and that the cable be double insulated. This is often referred
to as “jacketed” speaker cable. “Zip cord,” which is single
insulated and is often made with clear insulation, should be
avoided as it is not as durable. Allow about 2½ feet (0.8m) of
free cable at the speaker cut-out and sufcient length at the
other end to reach the electronics. Having to add extra cable
later can be tedious and time consuming.
Avoid bundling speaker cables parallel to electrical cables
for extended lengths. Though the impedance is low and the
likelihood of interference low, this may help reduce hum and
RF interference. When securing the cable, use care not to
staple or nail the electrical conductors. Doing so could result
in a short that might damage the electronics.
Overall (W x H) Cut-Out (W x H x Depth)
AP-525 LCRS 9"x15-3/4" 7-7/8"x14-7/16"x3-1/2"
SE-LCR KE 9"x15-3/4" 7-7/8"x14-7/16"x3-1/2"
PS-525 LCRS 9"x15-3/4" 7-7/8"x14-7/16"x3-1/2"
page 1 of 2Rev. A
For all Dual 5-1/4" In-Wall Loudspeakers
If connecting more
than two speakers to
one amplier channel
we suggest that you
consult a professional for
assistance.
When connecting your
speakers, make sure
proper polarity (phasing) is maintained. Simply put, this means
ensuring the same wire which is connected to the positive
terminal of the amplier has its other end connected to the
positive terminal of the speaker. Note: Most manufacturers use
red to designate +. If the connections on one of the speakers are
reversed, (out of phase) the quality of your bass will be seriously
impaired.
INSTALLATION
If the drywall has not yet been installed a Rough-in-Bracket (RIBLCR) may be used to reserve the speaker location on the wall.
The RIB-LCR brackets are available from the distributor or dealer
where the speakers were purchased. When the brackets are used
the holes are cut when the drywall is installed. The cable can be
tied off on the bracket after securing the cable to a nearby joist.
entering the back of the speaker. This can be accomplished by
placing a batt of berglass insulation over the back of the speaker.
As the diagrams show, the speakers utilize a metal mounting ring
which, after tightening with the screws provided, acts as a clamp
to hold the speakers in place.
Install the frame and mounting ring assembly by passing the black
mounting ring through the cut-out as illustrated in gures 1 & 2.
The white frame should t cleanly, without interference, in the cutout hole. If the hole is a little small then trim the hole as needed.
Lightly tighten the screws to secure the clamp ring against back
of the wall. (see g. 3) Use care not to over-tighten the screws or
the frame will become distorted and make it difcult to install the
grille.
If the drywall is installed and the speaker locations have not yet
been established then do so now. Assess the wall for possible
concealed obstructions such as wiring, plumbing, etc. Inspect the
backside of the wall, the attic, and/or the crawl space if available
for clues to possible obstructions. Use inspection holes with
inspection tools (camera, mirror, ashlight, etc.) if absolutely
necessary. Use a “stud nder” to locate the positions of the studs.
All the speakers are shipped with two different style clamp rings
that allow the speaker to be installed immediately next to a
stud—items
Once the speaker locations are established
use the paper template (the outside of
the outer cardboard rectangle) to mark
the speaker cut-out. The dimensions for
the cut-out are listed in the chart on the
previous page. Using the proper tool, cut
the appropriate sized hole in the wall. On
drywall, clean cuts can be made with a
drywall saw.
If the cable has not yet been run, do so now
that you have access to the wall’s interior.
& below.
Pull the end of the cable out of the wall, strip back a section of the
jacket as needed, and then expose ½" (13mm) of each conductor.
Connect the wire to the terminals on the back of the speaker
assembly, observing polarity (+ & -).
Insert the speaker into the frame and install the eight screws.
Tighten the screws beginning with the four inner screws followed
by the four outer. (see g. 4) Use care not to over-tighten the
screws or it may later become difcult to install the grille. Install
the grilles after testing the operation of the speakers. The grilles
are installed by gently working the edge of the grille into the frame
of the speaker, beginning at one corner and working one or both
directions around to an adjacent or opposite corner.
If the speaker frames are to be painted after installation, either
remove the speaker bafe assembly or use the paint-mask (the
inner cardboard rectangle) to cover the speakers to prevent
damage. DO NOT PAINT THE GRILLE AND
FRAME ASSEMBLY TOGETHER. The grille
should be painted separately. Use thin coats
and thin the paint as necessary to avoid
clogging the perforations with excessive
To aid in speaker performance, a brous material, such as
berglass or polyester ber, may be placed behind the speaker.
This may also help to reduce unwanted sound from being
transmitted into adjoining rooms. If the wall space has blown
or loose insulation, it is important to prevent the insulation from
paint.
page 2 of 2Rev. A
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