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INTRODUCTION
Thank you for choosing Bowers and Wilkins.
Your Signature™ Series speakers are precision
transducers incorporating many innovative
techniques unique to B&W and capable of
reproducing recorded sound to the highest
standards. So that they may perform at their best,
it is essential to take time and care with the
installation process. In particular, you must regard
the listening room as an extension of the speaker.
The acoustic character of the room can have a
profound effect on the final sound quality.
Please read this manual fully before unpacking
and installing the product. It will help you to
optimise its performance.
B&W maintains a network of dedicated
distributors in over 60 countries who will be able
to help you should you have any problems your
dealer cannot resolve.
UNPACKING
(figure 1)
• Fold the carton flaps right back and invert the
carton and contents.
• Lift the carton clear of the contents.
• Remove the polystyrene tray from the top
of the speaker.
• Lift the speaker out of the lower tray and,
resting one end side back on the tray for
protection, open and remove the
polythene bag.
We suggest you retain the packing for future use.
Check in the carton for:
• 4 self-adhesive rubber pads.
• 2 terminal link cables
• Cleaning cloth
Wood is a natural material and veneers vary
between batches. Expect some variation in the
finish between all the speakers in a home theatre
installation.
POSITIONING
(figure 2)
If using a projection television with an
acoustically transparent screen, place the
speaker behind the centre of the screen.
Otherwise position it directly above or below
the screen, whichever is closest to ear level.
Align the front of the speaker approximately
level with the screen.
Fix the 4 self-adhesive pads to the base of the
speaker. They give a degree of vibration
isolation, especially useful if placing the speaker
directly on top of a fairly flimsy television. The
flat area on top of the television may be smaller
than the base of the speaker, so position the feet
accordingly.
Alternatively, if you require more isolation or the
support surface is not quite flat, you may use 4
pieces of malleable re-usable adhesive (for
example Bostik®Blu-Tack®).
Stray magnetic fields
The speaker drive units are magnetically shielded
such that the stray magnetic field outside the
boundaries of the cabinet, except the front, is
too low to cause distortion of the television
picture in the vast majority of cases.
There are, however, some extremely sensitive
televisions - some that even have to be adjusted
according to their alignment with the earth’s
magnetic field. If you have a problem, first degauss the television set with the speaker in
place. Some have a button specially for this
purpose. If not, switch off the set at the mains for
15 minutes and switch on again. Merely putting
the set into standby mode is not sufficient.
If you still have a problem, try moving the
speaker either forwards or backwards a little to
get a more favourable juxtaposition, or space
the speaker further from the television until the
distortion disappears.
Because of the higher stray magnetic field in
front of the speaker, we recommend you keep
magnetically sensitive articles (computer discs,
audio and video tapes, swipe cards and the
like) at least 0.2m from the speaker.
CONNECTIONS
(figure 3)
All connections should be made with the
equipment switched off.
There are 2 pairs of terminals at the back of the
speaker to permit bi-wiring. The lower pair feed
the bass units and the upper pair feed the
midrange and tweeter.
The terminals are insulated to prevent any
likelihood of electrical shock, even when the
speakers are used with the highest powered
amplifiers, and accept a variety of cable
termination to suit most applications.
Bi-wiring is the preferred method of connection
and involves the use of separate cables from the
amplifier to each pair of terminals. The
separation of the signal paths improves the
resolution of low-level detail and allows the user
to optimise the type of cable to the frequency
range of use.
Should you not want to bi-wire, perhaps during
the initial set-up procedure or because you do not
want to see a multitude of cables in the room,
short cables are provided to link both positive
and both negative speaker terminals together.
When using the links, insert the spade into the
slot in the side of one terminal and the crimped
pin into the round side hole in the other. There is
enough clearance to insert a spade connector
from the amplifier into the same terminal as the
crimped pin.
Ensure each positive terminal on the speaker
(coloured red) is connected to the positive output
terminal of the amplifier and negative (coloured
black) to negative. Incorrect connection can
result in poor imaging and loss of bass.
When bi-wiring, do not use the linking cables.
Take extra care with the polarity of the
connections as incorrect connection can also
impair the frequency response through the bassmidrange crossover and, if the links are left in
place, may cause damage to the amplifier by
shorting its output terminals.
FINE TUNING
Before fine tuning, double check that all the
connections in the installation are correct and
secure.
For greatest realism in home theatre installations
it is important to balance the speakers and
adjust the acoustic image to match the size of
the screen. With smaller screens it may be more
realistic to have the left and right speakers closer
together than you might for audio alone.
Adjust the levels of the three front speakers to get
a smooth transition of sounds as they pan across
the screen. Adjust the level of the surround
speakers so that, except for special effects, your
attention is not unduly attracted to them.
Sit in all likely listening positions when deciding
on the optimum levels.
Consult your decoder manual for further
information on how to set the levels.
For the most discerning listening, remove the
cloth covered grille as described below in the
section “Aftercare”. The tweeter is very delicate
and its grille should be left in position for
protection. For this reason the grille retaining ring
is designed to provide the optimum acoustic
environment for the unit and the response is less
smooth with the grille removed.
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
60 hours of average use for the mechanical
parts to attain their intended design
characteristics.
ANCILLARY EQUIPMENT
Speakers of this ability deserve signals of the
highest quality. Choose your electronic
equipment and interconnecting cables with care.
We can give guidance on what to look for when
choosing ancillary equipment, but cannot
recommend specific items. The standards of such
products are improving all the time and your
dealer will be able to demonstrate a variety of
suitable up-to-date products.
In the specification we recommend a range of
amplifier powers. The higher figure is defined by
the power handling capability of the speaker.
When calculating the power handling, it is
assumed that the amplifier is not run into
clipping, which distorts the frequency power
spectrum of the signal, and that the signal is
normal programme material. Test tones from
oscillators and the like are not applicable. The
lower figure is the minimum we consider
necessary to achieve reasonable listening levels