OEM PS-601 User manual

INSTALLATION GUIDE
page 1 of 2Rev. A
  Overall Cut-Out (Round x Depth)
PS-601  8-3/8"round 7-3/8"x2-7/8"
PS-611  8-3/8"round 7-3/8"x2-7/8"
PS-801  9-3/4"round 8-5/8"x3-3/8"

SC-520KE 7-1/2"round 6-1/2"x2-3/8"
SC-620KE 8-3/8"round 7-3/8"x2-7/8"
SC-622K 8-3/8"round 7-3/8"x2-7/8"
SC-820KE 9-3/4"round 8-5/8"x3-3/8"
SC-822K 9-3/4"round 8-5/8"x3-1/2"
AP-601  8-3/8"round 7-3/8"x2-7/8"
AP-611  8-3/8"round 7-3/8"x2-7/8"
AP-801  9-3/4"round 8-5/8"x3-3/8"

SC-502E 7-1/2"round 6-1/2"x2-3/8"
SC-602E 8-3/8"round 7-3/8"x2-7/8"
SC-62  8-3/8"round 7-3/8"x2-7/8"
SC-802E 9-3/4"round 8-5/8"x2-7/8"
For 5-1/4", 6-1/2" & 8" Round In-Ceiling For 5-1/4", 6-1/2" & 8" Round In-Ceiling
Round In-Ceiling Loudspeakers
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 regarding this speaker which 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. 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 ampliers from
5 to 125 Watts RMS. However, damage to the speakers
can be done by ampliers of nearly any power rating
if the amplier is overdriven into clipping. “Amplier
clipping” is a phrase used to describe a condition when,
because of the volume demand, an amplier 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 Ceiling 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. Here are a couple quick suggestions. For more
bass, place the speakers between 18 and 36 inches from an
adjacent wall as measured to the center of the hole. 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.
Some speaker models are supplied with a cardboard
“Drywall Locator.” If the drywall has not yet been installed,
these locators can be used to reserve the ceiling location.
The hole is cut when the drywall is installed. Simply unfold
the arms and staple each arm to the joists. Use additional
staples through the disk to retain it after adjusting its
position. The cable should be tied off at the hole after
securing it to a nearby joist.
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

page 2 of 2Rev. A
For 5-1/4", 6-1/2" & 8" Round In-Ceiling For 5-1/4", 6-1/2" & 8" Round In-Ceiling
and sufcient 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.
More than two pair of these speakers can be
connected to one amplier. However, we suggest that
you consult a professional if you are installing more than two
pair.
When connecting your speakers, make sure proper polarity
(phasing) is maintained. Simply put, this means being sure
the same wire which is hooked to the positive terminal of the
amplier has its other end hooked to the positive terminal of
the speaker. It is important to check this on all speakers. 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 speaker locations have not yet been established then
do so now. Assess the ceiling area for possible concealed
obstructions such as wiring, plumbing, heating ducts, etc. This
is best done through an attic crawl space if available. Absence
of a crawl space will require greater study of observable
clues and may possibly require the use of inspection holes
and inspection tools (camera, mirror, ashlight, etc.). Use a
“stud nder” to locate the positions of the joists or rafters. We
recommend that the edge of the holes be at least ¾" (19mm)
away from joists or rafters whenever possible.
Once the speaker locations are established use the paper
template (the outside of the outer cardboard disc) or the plastic
protractor provided with your speaker to mark the speaker
cut-out. The hole diameters for the various
speakers are marked on the protractor.
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 ceiling’s interior. Once the speaker
cable has been run, pull the end of the cable out of the ceiling,
strip back a section of the jacket as needed, and then expose ½"
(13mm) of each conductor.
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 ceiling space has blown
or loose insulation, it is important to prevent the insulation from
entering the back of the speaker. This can be accomplished
by placing a batt of berglass insulation, fabric barrier, or bag
over the back of the speaker. Alternatively you may use an
Insu-Flate ISF-147, which is an acoustically transparent fabric
cover specically designed for this application. Placing a rigid
enclosure over the speakers can be done but the enclosure
should be large enough not to degrade the performance of the
speaker. Rigid enclosures of less than 0.75 cuft (21
liters) should be stuffed with acoustic insulation
such as berglass.
Remove the grilles from the speakers using the
supplied tool by hooking the grille near its edge.
As the drawing below shows, the speakers utilize
Toggle Clamps which, after tightening, hold the
speakers in place. Ensure that the toggle clamps are rotated
into their “home” position. This way, they will clear the edge of
the cut-out.
Verify that the speaker ts properly into the cut-out. If the hole
should have been cut a little too large the ange on the frame
should cover this. Remove the speaker from the hole.
Connect the wire conductors to the terminals on the back of the
speaker by depressing each spring terminal, inserting the wire
into the hole, and releasing the terminal. Use care to observe
the proper polarity (+ & -). Speakers wired out of phase will
exhibit an apparent loss of bass response.
Note: Single-Point speakers have both the left and right
channel connections on the same speaker. Ensure that
both channels are connected and in phase. An out of phase
connection to a single-point speaker will be immediately
obvious when signal is applied since there will be little if any
bass output. If disconnecting one of the inputs increases the
bass output then the inputs are out of phase.
Insert the speaker into the hole and tighten the installation
screws. As you start to turn each screw the toggle clamps will
rotate outward to engage the ceiling
material as shown. CAUTION: DO NOT
OVER-TIGHTEN THE CLAMPS. Too much
torque may damage the toggle, causing
the speaker not to seat securely. A snug
t is all that is necessary to assure proper
performance.
If the speaker frames are to be painted,
either before or after installation, use the
paint-mask (the inner cardboard disc)
to cover the speaker driver(s) 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 paint.
If your speaker includes a pivoting tweeter aiming it toward the
listening area will raise the amplitude of the highest frequencies
(>12kHz), adding brilliance. USE CARE TO AVOID DAMAGING THE
DOME OF THE TWEETER WHEN AIMING!
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ISF-147