T
o optimise the smoothness of sounds panning from
the front of the room to the back and vice versa when
s
peakers are used in dipole mode, we recommend
that the side speakers have their positive lobes
(
arrows) pointing towards the front of the room and
t
he rear speakers have their positive lobes (arrows)
pointing towards the centre of the rear wall. (figure 6)
Stray magnetic fields
T
he speaker drive units create stray magnetic fields
that extend beyond the boundaries of the cabinet. We
recommend you keep magnetically sensitive articles
(
television and computer screens, computer discs,
audio and video tapes, swipe cards and the like) at
least 0.5m (20 in) from the speaker. LCD and plasma
s
creens are not affected by magnetic fields.
Connections (
figure 7)
All connections should be made with the equipment
switched off.
Ensure the positive terminal on the speaker (marked +
and coloured red) is connected to the positive output
terminal of the amplifier and negative (marked – and
coloured black) to negative. Incorrect connection can
result in poor imaging and loss of bass.
The spring-loaded terminals accept bared wire ends.
Press down on the end of the terminal to expose the
side hole.
Fixing the speaker in place
Retrofit
Use a stud finding tool to locate the position of the
studs behind the plasterboard panels.
Use the template provided to mark the position of the
speaker. The outside edge of the template represents
the size of the wall frame. Do not allow the template to
overlap a stud position or the swing-out clamps will
not operate correctly.
Mark along the inner edge of the slots in the template.
Join up the lines and cut out the aperture. (figure 8)
New construction
When the wall studding is in place, but before the
plasterboard (drywall) panels are fitted, fix the pre-
mount kit (PMK), following the instructions included
with the kit. (figure 9) Plasterboard (drywall) panels
may then be fitted with an aperture for the PMK and
finished.
All applications
Draw the cable to the aperture. Make sure that the
cable and any other services in the cavity are
prevented from rattling against the structure, either by
securing or padding.
Push acoustic wadding into the wall cavity between
the sides of the aperture and the vertical studs and
above and below the apertur
e to a distance of 15cm
(6 in) or more. Suitable materials are fibreglass or
mineral wool matting, as sold for heat insulation, or
polyester fibre used for filling duvets (comforters).
Foam pads may also be used, but these must be of
the open cell variety. Closed cell foam, commonly sold
for furniture use is not suitable. (figure 10)
P
ush the wall frame into position and secure. For all
situations, this is done by screwing up the swing-out
c
lamps. The initial turn of the screw will cause the
clamps to swing out into position and further turning
w
ill draw them towards the back of the wall. In retrofit
s
ituations without the PMK for protection, take care not
to over tighten the clamps, otherwise the plasterboard
w
ill crush and weaken the fixing. (figure 11)
D
ecorating is best carried out at this stage, before the
baffle and drivers are fitted. The wall frame may be
painted using any normal household paint. Never paint
o
ver the grille fabric as this will clog the pores and
impair the sound. We recommend you do not attempt
t
o paint the speaker baffle. The combination of a black
grille frame in front of a black baffle ensures that the
cross pattern of the grille frame is least visible, even
with white cloth.
Connect the cable to the speaker as described in the
“Connections” section above and screw the baffle into
the wall frame using the pan head screws provided.
The grilles are a push fit onto the baffle, but before
fitting them, balance the installation following the
processor instructions and select dipole or monopole
mode as preferred (see below).
Mode selection (figure 12)
Use the switch on the front baffle to select between
monopole and dipole modes. In the
l position, the
speaker is monopole and in the ll position it is dipole.
Experiment to find the settings best suited to your
requirements. Typical combinations are:
• All surround speakers monopole
• Side speakers dipole, rear speakers monopole
• All surround speakers dipole
It would be unusual, but not impossible, to set side
speakers to monopole and rear speakers to dipole.
Aftercare
With the grille detached from the cabinet, clean the
fabric with a normal clothes brush or vacuum cleaner
with appropriate accessory.
Avoid touching the drive units, especially the tweeter,
as damage may result.
Limited Warranty
This pr
oduct has been designed and manufactur
ed to
the highest quality standards. However, if something
does go wrong with this product, B&W Group Ltd. and
its national distributors warrant free of charge labour
(exclusion may apply) and r
eplacement parts in any
country served by an official B&W distributor.
This limited warranty is valid for a period of five years
fr
om the date of purchase or two years for electronics
including amplified loudspeakers.
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