OEM Presence A-505 User manual

INSTALLATION GUIDE
  Overall Cut-Out (Round x Depth)
A-505  7-1/2"round 6-1/2"x2-3/8"
A-606  8-3/8"round 7-3/8"x2-7/8"
A-SP6  8-3/8"round 7-3/8"x2-7/8"
A-808  9-3/4"round 8-5/8"x3-3/8"
A-SP8  9-3/4"round 8-5/8"x3-3/8"
Round In-Ceiling Loudspeakers
page 1 of 2Rev. B
Congratulations! You have purchased a high quality stereo
loudspeaker. When matched to comparable electronic
equipment, expect years of quality high delity sound. The
Presence brand is based on the belief that music matters
and we are focused on delivering superlative music
reproduction everywhere in your home.
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
can 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.
MINIMUM TOOLS REQUIRED
# 2 Phillips Head Screw Driver / Drill Driver
Wire Cutter / Stripper
Other Possible Tools
Tape Measure, Pencil, Ladder, Drywall Saw, Stud-Finder,
etc.
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 in-ceiling and 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. However, here are a couple quick
suggestions. For more bass we recommend that the
speakers be placed between 18 and 36 inches from an
adjacent wall/surface, as measured to the center of the
hole. Avoid placing the speakers less then 12 inches from
an adjacent wall. When placing speakers near a corner,
avoid locating them an equal distance from the two
adjacent surfaces.
If the drywall has not yet been installed, rough-in-kits are
available to reserve the speaker location. The hole is cut
when the drywall is installed. The cable can be tied off on
the rough-in-kit 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. 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 and CL-2 or CL-3 rated. “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
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.
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
For: 5-1/4, 6-1/2"& 8"In-Ceiling
Presence

page 2 of 2Rev. B
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 or wall area for possible concealed
obstructions such as wiring, plumbing, heating ducts, etc.
For the ceiling 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 studs. We recommend that the edge of the
speaker holes be at least ¾" (19mm) away from joists or studs
whenever possible to allow clearance for the toggle clamps.
Once the speaker locations are established use the cardboard
template (the outside of the inner cardboard disk) or the
plastic compass provided with your speaker to draw the
speaker cut-out. The hole diameters for the various speakers
are marked on the compass. The cardboard templates may
also be used as a visual aid for placement of the speakers.
Temporarily hold the templates in place with a push tack or
tape.
Using the proper tool, cut the
appropriate sized hole in the wall. On
drywall, clean cuts can be made with a
drywall saw. Cut the hole to the inside
of the drawn circle.
If the cable has not yet been run, do so now that you have
access to the ceiling or wall's interior. Once the speaker cable
has been run, pull the end of the cable out of the speaker
cut-out, 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 behind 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.
As the drawing 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 speaker 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 four toggle
screws. As you start to turn each screw the toggle clamps will
rotate outward to engage the ceiling or wall 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!
ISF-147
For: 5-1/4, 6-1/2"& 8"In-Ceiling
Presence
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Tighten 4
Phillips screws