independently.
Bi-wiring
can improve the resolution
of
low-level detail. Figures
3a
and 3b illustrate
conventional and bi-wire connection.
Ensure that positive terminals on the speaker (marked
+ and coloured red) are connected to the positive
output
terminal
on
the amplifier
and
that negative
terminals on the speaker (marked - and coloured
black) are connected to the negative output terminal
on the amplifier. Incorrect connection can result in
poor imaging and loss of bass.
Ask your dealer
for
advice when selecting speaker
cable. Keep its total impedance below the maximum
recommended in the speaker specification and use a
low inductance cable to avoid attenuation of high
frequencies.
Fine Tuning
Before fine tuning, make sure that all the
connections
in the installation are correct and secure.
Moving the
speakers
further from the walls will
generally reduce the volume of bass. Space
behind
the speakers will also help to create an aural
impression of depth. Conversely, moving the
speakers
closer to the walls will increase the volume of bass. If
you
want to reduce the volume
of bass
without
moving the speakers further from the wall, fit the foam
plugs in the port tubes as illustrated in Figure 4.
If the bass seems uneven with frequency this will most
probably
be due
to resonance modes
in the listening
room. Even small changes in the position of the
speakers or the listening position can have a profound
effect on how these resonances affect the sound. Try
moving the listening position
or
locating the
speakers
along a
different wall. The
presence and
position of
large pieces of furniture can also influence resonance
modes.
If the central image lacks focus, try moving the
speakers closer together or
angling them inward
so
that they point at a location just in front of the listening
position. Figure 2b illustrates speakers angled inwards.
If the sound is too bright, increasing the
amount
of
soft furnishing in the room (heavier curtains for
example) may help balance
the
sound. Conversely,
reducing the amount of soft furnishing
may
help
brighten a dull sound.
Some
rooms suffer from "flutter echoes" - echoes
that
"bounce" between parallel
room
boundaries. Flutter
echoes can colour the sound of the
speakers
in the
room. Test for flutter echoes by standing in the middle
of the room and clapping your hands. Flutter echoes
can
be reduced by placing irregular
shaped
items
or
non-reflective surfaces, bookshelves, rugs or pictures
for example, on one of the offending walls or floor.
Ensure that the speaker stands firmly
on
the floor.
Use
carpet
piercing spikes if appropriate and adjust them
to
take
up any
unevenness.
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
may be cleaned with a normal clothes brush whilst the
grille is detached from the cabinet. Avoid touching the
drive units, especially the tweeter, as damage may
result.
Limited Warranty
This product has been designed and manufactured 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 replacement parts in any
country served by an official B&W distributor.
This limited warranty
is
valid for
a period of
five years
from
the
date of purchase or
two years
for
electronics
including amplified loudspeakers.
Terms and Conditions
1 The
warranty
is limited
to
the repair of the
equipment. Neither transportation, nor any other
costs, nor any risk for removal, transportation and
installation
of products
is
covered by
this warranty.
2
This
warranty
is only valid for
the
original
owner. It
is not transferable.
3 This warranty
will not be applicable in
cases other
than defects in materials and/or workmanship at
the time of purchase and will not be applicable:
3
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