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5.1 channel
The horizontal angle to the centre of the
listening position should be approximately
120º round from the centre of the screen.
The speakers may also be successfully
mounted in the side wall for this
application. They should be positioned at
least 60cm (2 ft) above ear height and with
the frames rotated so that the drive units
are directed towards the centre of the
listening area. (figure 4)
6.1 channel
Position two speakers to the sides in line
with the centre of the listening area and
one centrally behind the listeners, with the
frames rotated so that the drive units are
directed towards the centre of the listening
area. (figure 5)
7.1 channel
Position two speakers to the sides in line
with the centre of the listening area and
two behind the listeners, subtending an
angle of approximately 40º. (figure 6)
PREPARING THE LOCATION
Choosing cable
Excessive resistance in the speaker cable
wastes power and alters the frequency
response of the speaker. Always try to keep
the resistance as low as possible with the
loop resistance preferably below 0.5 ohms
for non-critical applications and below
0.2 ohms for best results. Use the table of
figure 11 to calculate the minimum gauge
of cable required.
Existing drywall construction
(retrofit)
Mark the centre position of the speaker and
position the template so the mark shows
through the hole in the middle.
Trace round the outer edge of the template
and cut neatly just inside the line.
To improve the mechanical integrity of the
ceiling or wall and reduce the likelihood of
rattles, we recommend you apply a bead of
wood glue or mastic along the joints
between the back of the plasterboard and
the studs in the vicinity if the speaker.
Run the cable to the aperture, allowing
enough length to comfortably connect the
speaker, but not too much, as the excess
may rattle against the structure.
New drywall construction
The speaker can be installed once the
ceiling or wall is completed in the same
manner as retrofitting, but it is easier to
position and cut the hole if the optional pre-
mount kit is used before the plasterboard
(sheetrock) is fitted.
Staple or nail the PMK to the studs as
described in the instructions with the kit.
Run the cable and secure it to the fixing
point on the PMK. Allow enough length to
comfortably connect the speaker, but not
too much, as the excess may rattle against
the structure.
Results are affected by how well the
plasterboard is attached to the studs and
we recommend gluing as well as screwing
or nailing the panels to the studs in the
vicinity of the speaker.
Once the board is fitted, the inner flange of
the PMK serves as a guide for a hole router
or saw.
Solid wall construction
In order for the bass performance not to be
compromised, the speaker requires a cavity
volume of at least 15 litres. This means that,
in a standard 10cm (4 in) thick wall, the
cavity will extend beyond the boundaries of
the speaker frame. It is possible to provide
this cavity simply by using a lintel, covering
the hole with plasterboard and fitting the
speaker as described above for retrofitting
into a drywall. (figure 7)
Damping the cavity
Fill the wall cavity, allowing room for the
speaker itself, with unlined fibreglass or
mineral wool matting. The packing density
should be just enough to comfortably
prevent the material from dropping or
sagging over time. In an open wall cavity, fill
to a distance of at least 30cm (1 ft) above
and below the speaker. (figure 8)
In the ceiling, drape the matting at the back
of the ceiling board, covering the aperture
and extending at least 30cm (1 ft) around
the speaker into open void. (figure 9)
IMPORTANT: Ensure that the materials you
use meet local fire and safety regulations.
Fitting the speaker
All connections should be made with the
equipment switched off.
Connect the cable, observing the correct
polarity.
With the grille removed, position the
speaker in the aperture and screw in the
4 screws visible from the front (see the note
above in the contents section). These
screws automatically swing out clamping
dogs that locate behind the mounting
surface. Ensure that they have located
properly before fully tightening the screws.
A certain amount of flexing of the frame is
allowed to take up unevenness in the
mounting surface, but do not over-tighten
the screws as excessive distortion of the
speaker frame may result.
Fit the white grommets into the two screw
recesses in the white area of the frame, so
as to give a smooth finish. (figure 10)
Adjusting the speaker
The speaker is designed to point towards
the listening area and for most instances
this gives best results. However, for some
surround speaker applications, better
overall results may be obtained if the sound
is directed away from the listening area.
Typically this may apply if:
a.
The room is particularly live and the
sound becomes harsh.
b.
The listening area is a large proportion
of the room. Increasing the amount of
reflected sound and reducing the
amount of direct sound may give a
better average balance between the
speakers for all listeners.
Customising
The frame and grille have a paintable white
semi-matte finish, ready if necessary to be
re-finished to match your own decor.
Before painting the grille, remove it from the
frame. When replacing the grille align the
notch in the edge of the mesh with the
protrusion in the groove of the frame.
Do not re-finish the drive units or baffle
area behind the grille. Use the paint mask
provided. Avoid touching the drive units, as
damage may result.
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