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Back Can S/PMK 8/PMK 6/PMK 3
Installing the PMK into the Back Can
The following procedure shows how to connect a PMK 6 to the back can.
The procedure is the same for the PMK 8. The PMK 3 is not used with the back can.
1. Hold the PMK 6 or PMK 8 assembly onto the back can, with the circular lip of
the frame pointing into the room (Fig. 5).
2. Make sure the PMK assembly is centered, plumb, and level. Secure it to the
back can with four screws, using the existing holes at the top and bottom of
the back can (Fig. 6).
3. When the drywall is fi tted over the back can, a generous bead of fi re-retardant
sealing mastic should be applied to the back can fl anges in order to seal the
assembly and minimise the possibility of vibration when the speaker is in use.
Fig. 6. Install the PMK 6 into the Back can
Front
Lip
Fig. 5 Front of the PMK is the side with the lip (PMK 6 shown)
Fire-retardant
sealing mastic
Fig. 7 Apply a generous amount of fire-retardant sealing
mastic over the back can flange area as shown.
Installing the PMK without the Back Can
1. Assemble the PMK with the mounting brackets attached to the PMK frame.
(See Fig. 4 on page 11).
2. Hold the PMK assembly onto the joists, with the circular lip of the frame
pointing into the room.
3. Make sure the PMK assembly is centered, plumb, and level. Secure it to the
joists using four woodscrews.
4. Run speaker wire to this location (Fig. 8). Leave enough slack to make the
connections when that time comes. Tie down the speaker cable to prevent
it moving and rattling in operation. Make sure that the speaker cable
does not come into contact with nails or screws that might damage the
electrical insulation.
Installing the Drywall
1. The installation of drywall around the PMK location is best arranged so there
are no drywall joins near the PMK (Fig. 9).
2. If you want to cut the drywall aperture before installation, use the PMK
aperture as a guide. Step 5 below describes cutting after the installation. Use
whichever method you prefer.
3. Use adhesive on the wall studs and the front face of the back can (if used),
and install the drywall using drywall screws approximately 8 to 10 inches
apart. This will help prevent wall rattling and drywall movement and noises
during operation. If the loudspeaker is being installed on an interior wall,
then adhesive and extra screws may also be added to the drywall used in
the room behind the loudspeaker.
4. Note: Before adding any drywall screws where the metal back can is installed,
drill small pilot holes into the metal of the back can.
5. After the drywall installation, carefully cut out the hole in the drywall
with a suitable handtool, using the inside aperture of the PMK as a guide
(Fig. 10 and 11). Be careful not to cut the speaker wires or cut into the back
can acoustic foam. Make sure the drywall aperture is no larger than the
inside aperture of the PMK frame. Remove any dust or debris from within
the back can.
6. The PCI and QCI ceiling loudspeaker quick start guide includes the procedures
for installing the loudspeakers into the wall apertures.
Quick Start Guide
Fig. 8. PMK attached to ceiling joists or wall studs (PMK 3 shown)
Fig. 9. Drywall Screws, PMK 6 with back can
Fig. 10. Drywall Screws, PMK 3 without back can
Fig. 11. Drywall Cutout (with PMK)
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