Fine Tuning; Running-In Period - Bowers & Wilkins XT Serie Manual De Instrucciones

The templates show the position of the wall plate in
relation to the outline of the speaker when facing at
right angles to the wall (ie not swivelled).
Using a spirit level, offer the appropriate template to
the wall with the outline in the desired position of the
speaker and mark 4 screw positions through the
marked slots. Drill and plug the wall for 4mm (No.8)
screws. If running cable in the wall, the exit clearance
hole should be positioned as shown by the shaded
area on the template.
Run the cable in the wall if desired. If the wall is
drywall construction, leave approximately 30cm (1 ft)
of cable protruding from the wall. Excess cable may
be pushed back into the wall void as the speaker is
mounted. If the cable is chased into solid wall
construction, the excess has to be accommodated
behind the 'wave' cover, so it is better to trim the
cable to no more than 15cm (6 in).
Screw the wall plate to the wall in the orientation
shown in figure 7.
Attach the 4 self-adhesive clear rubber strips from the
bracket kit to the underside of the wave plate as
shown in figure 8.
Attach the wave cover to the back of the speaker
using an M6 screw and profiled washer. (figure 9) The
thicker side of the 'wave' cover should be positioned
on the opposite side to the direction of swivel (eg to
the left of the left front speaker and the right of the
right front speaker). (figure 6) See the section "Fine
tuning" with regard to setting the required amount of
swivel.
Feed the cable through the clearance holes in the
wave plate and connect to the terminals (figure 10),
following the instructions in the section "Connections".
Taking care with the positioning of excess cable,
attach the wave cover to the wall plate.
Connections
(figure 11)
All connections should be made with the equipment
switched off.
Connect the positive terminal on the speaker (upper
terminal marked + and coloured red) to the positive
output terminal of the amplifier and negative (lower
terminal marked – and coloured black) to negative.
Incorrect connection can result in poor imaging and
loss of bass.
If using the optional floor stand, feed the cable
through the stand as shown in the stand instructions
and then through the half-round aperture at the
bottom rear of the cabinet, up through the cable
channel in the cabinet extrusion to the terminal panel.
Ask your dealer for advice when choosing cable. Keep
the total impedance below the maximum
recommended in the specification and use a low
inductance cable to avoid attenuation of the highest
frequencies.

Fine tuning

Before fine tuning, double check that all the
connections in the installation are correct and secure.
Moving the speakers further from the walls will reduce
the general level of bass. Space behind the speakers
also helps to create an impression of depth.
Conversely, moving the speakers closer to the walls
will increase the level of bass.
To reduce the bass level without moving the speakers
further from the wall, fit the foam plug in the port tube
(figure 12). To access the port, remove the grille by
gently pulling it away from the cabinet.
Uneven bass is usually due to resonance modes in the
room and it is worth experimenting with both speaker
and listener position. Try mounting the speakers along
a different wall. Even moving large pieces of furniture
can have an effect.
If the 2-channel central image is poor, try moving the
speakers closer together or toeing them in so they
point at or just in front of the listeners. (figure 13)
If the sound is too harsh, increase the amount of soft
furnishing in the room (for example use heavier
curtains), or reduce it if the sound is dull and lifeless.
Test for flutter echoes by clapping your hands and
listening for rapid repetitions. They can be reduced by
the use of irregular shaped surfaces such as
bookshelves and large pieces of furniture.

Running-in Period

The performance of the speaker will change subtly
during the initial listening period. If the speaker has
been stored in a cold environment, the damping
compounds and suspension materials of the drive
units will take some time to recover their correct
mechanical properties. The drive unit suspensions will
also loosen up during the first hours of use. The time
taken for the speaker to achieve its intended
performance will vary depending on previous storage
conditions and how it is used. As a guide, allow up to
a week for the temperature effects to stabilise and
15 hours of average use for the mechanical parts to
attain their intended design characteristics.
However, longer run-in periods (as long as a month)
have been reported and there is evidence to suggest
that this has little to do with the speaker changing and
more to do with the listener getting used to the new
sound. This is especially so with highly revealing
speakers such as these where there may be a
significant increase in the amount of detail compared
with what the listener has previously been used to; the
sound may at first appear too "up front" and perhaps
a little hard. After an extended period of time the
sound will seem to mellow, but without losing clarity
and detail.
Aftercare
The cabinet surfaces usually only require dusting. If
you wish to use an aerosol or other cleaner, remove
the grille first by gently pulling it away from the
cabinet. Spray aerosols onto the cleaning cloth, not
directly onto the product. Test a small area first, as
some cleaning products may damage some of the
surfaces. Avoid products that are abrasive, or contain
acid, alkali or anti-bacterial agents. Do not use
cleaning agents on the drive units. The grille fabric
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