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
sound quality will be impaired.
INSTALLATION
If the speaker locations have not yet been established then do so
now. If possible, assess the area behind the ceiling for possible
concealed obstructions such as wiring, heating ducts, cross-
bracing etc. Absence of a crawl space will require greater study
of observable clues and may also require the use of inspection
holes and inspection tools (camera, mirror, flashlight, etc.). Use
an “electronic stud finder” to locate the positions of the joists or
studs. We recommend that the edge of the speaker holes be at
least 3/4" (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 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. To
do this, temporarily hold the templates in place with a push tack or
tape.
Using the proper tool cut the appropriate sized
hole in the ceiling. On drywall, clean cuts can
be made with a drywall saw. Make sure to clean
the excess debris from the front face of the hole
to ensure a flush fit.
If the cable has not yet been run, do so now that you have better
access to the ceiling. 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 fibrous material, such as
fiberglass, 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, care
must be taken to prevent the loose
insulation from entering the back of the
speaker. This can be accomplished by
placing a batt of fiberglass 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
specifically 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 cu ft (21 liters) should be stuffed with
acoustic insulation such as fiberglass.
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 prior to installation.
You will need to remove the grille in order to access the toggle
clamp screws. To remove the grille from the speaker, pull at the
grille’s edge. A tool is supplied that can
be inserted through a perforation at
the grille’s edge. Pull the grille outward
after insertion of the tool.
Verify that the speaker fits properly
into the cut-out and then 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 fit 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.
The grilles can be painted using multiple light coats
of paint. Certain paints will require thinning to avoid clogging
the grille’s perforations. It is not necessary or recommended to
remove the scrim cloth from the back of the grille prior to painting.
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!
After testing the operation of the speakers press the grille into the
slot of the frame and enjoy!
page 2 of 2
Install Guide
Rev. F
For: 5-1/4, 6-1/2"& 8"
In-Ceiling
ISF-147
RO
TA
TE
Home
Tighten 3
Phillips screws
Clean front
edge of cutout
to ensure a
flush fit.
