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INTRODUCTION
Thank you for choosing Bowers & Wilkins.
Your Signature™800 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)
The product is extremely heavy and will require
more than one person to unpack and position it
safely.
We recommend you wear gloves and strong
shoes to avoid personal injury in case of
accident. Observe the normal rules of good
posture when lifting heavy objects to avoid
strain. Remove any rings and bracelets to avoid
damage to the surfaces of the product.
• By the time you read this manual, the carton
should be laying on the floor with the speaker
face up, as indicated by the printing on the
side of the carton.
• Remove the lower packing tray to expose the
plinth of the speaker.
• Open the bag and pull it clear of the plinth.
• Stand the speaker upright and remove the
remainder of the packing.
• Remove the plug at the top of the back of the
cabinet to reveal the rear mounting of the
midrange driver.
• Unscrew the cross-head screw in the centre of
the mounting and remove the transit clamp
disc. (This reveals a large slotted tensioning
screw. The position of this screw is factory set
to optimise the anti-vibration mount of the
midrange driver and should not be altered).
• Replace the plug in the back of the cabinet.
We suggest you retain the packing for future use.
Check in the accessory pack for:
1 International warranty booklet
4 foot receptacles
4 Screw-in spike foot tips (pre-fitted to
receptacles)
4 Screw-in foot pads
1 Midrange unit centre-bullet
1 Midrange unit grille
1 Allen key
1 Foot adjustment bar
1 Cleaning Cloth
1 Connolly Leather Cleaner
(odd numbered carton only)
Wood is a natural material and veneers vary
between batches. Although supplied as single
units, systems with consecutive serial numbers
(odd number lower) have veneer-matched
cabinets. Please be aware that if more than two
speakers are purchased for a single installation,
B&W cannot guarantee they will all be veneer
matched.
POSITIONING
(figure 2)
The speakers are provided with ball glides on
the underside of the plinth to facilitate movement.
However, to prevent the weight of the speaker
causing damage to non-carpeted floors, place a
piece of felt or carpet under the plinth and slide
the speaker into position. To manoeuvre the
speaker without tipping, push low down on the
cabinet.
Both spike feet (for carpeted floors) and padded
feet (for wooden and other vulnerable floors) are
provided as an alternative to the roller ball
glides. However, we do not recommend you fit
these until after the optimum position for the
speakers has been determined.
To find the optimum position in the room may
involve a certain amount of experimentation, but
as an initial guide:
• Position the speakers and the centre of the
listening area approximately at the corners of
an equilateral triangle.
• Keep the speakers at least 2m apart to
maintain left-right separation.
• The speakers are designed to be free-standing
and will generally perform best when
positioned at least 0.5m (20-in) from walls.
The proximity of the speakers to walls affects
the sound quality. See the section “Fine Tuning”
below.
Stray magnetic fields
The 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 from the
speaker.
CONNECTIONS
(figure 3)
All connections should be made with the
equipment switched off.
The high quality WBT®terminals accept a variety
of cable terminations to suit most applications.
For either 6mm (1/4 in) or 8mm (5/16 in) spades,
use the larger diameter section of the screw
caps. For 4mm banana plugs, use the smaller
diameter section of the screw caps, which
loosens or tightens a collet round the plug. In all
cases, make sure both sections are screwed
down in use to prevent rattling.
Important safety notice:
In certain countries, notably those in Europe, the
use of 4mm banana plugs is considered a
potential safety hazard, because they may be
inserted into the holes of unshuttered mains
supply sockets. In order to comply with European
CENELEC safety regulations, the 4mm holes in
the ends of the terminals are blocked by plastic
pins. Do not remove the pins if you are using the
product where these conditions apply.
There are 2 pairs of terminals at the back of the
speaker. The outermost (LF) pair feed the bass
drivers and the innermost (MF/HF) pair feed the
midrange and tweeter. This separation of the
inputs to each section of the speaker allows a
choice of connection methods.
On delivery, both positive and both negative
terminals are connected together with highquality links for use with single 2-core cable. If
you wish to use single cable connection, the
links must be left in place. Because high
frequency signals are more readily degraded by
contact connections, we recommend you connect
the cable directly to the innermost (MF/HF)
terminals (figure 3a). Even if you finally intend to
use a more complex connection method, single
cable connection aids free movement of the
speakers during initial setting up. There is
enough clearance to fit a spade connector on
top of a link.
Separation of the signal paths to each section of
the speaker can improve imaging and the
resolution of low-level detail and allows the user
to optimise the cable to the frequency range of
use. Bi-wiring involves the use of two separate 2core cables from the same amplifier, one to each
pair of terminals on the speaker. Bi-amplification
involves the use of two separate power amplifier
channels for each speaker. In both cases, the
links should be removed from the speaker
terminals (figure 3b).
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 may
result in impairment of frequency response, poor
imaging and loss of bass.
If using bi--amplification, ensure that each
amplifier channel has the same gain, otherwise
you will change the balance of the speaker.
Check the absolute polarity. Some amplifiers
invert the signal, and a mixture of different types
may cause a dip in the overall response. If you
have a mixture of inverting and non-inverting
amplifiers, reverse the polarity of the connections
from any inverting amplifier to the speaker. Bear
in mind that, even though midrange and, even
more so, tweeter drivers can (and only need to)
handle less continuous power than bass drivers,
the amplifier feeding them needs to have an
adequate voltage swing in order to supply the
short–term high–frequency peaks in music without
distortion. A high voltage capability implies high
power, so it is not particularly desirable to have
a lower power amplifier feeding the midrange
and tweeter than is used for the bass drivers.