Bowers & Wilkins DM600 S3, Owner'S Manual

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surround field will depend to a great extent
on domestic constraints – how free you are
to position the speakers in an ideal position
and how large an audience you want to
cater for, relative to the size of the room.
There is no industry standard for the angle
subtended by the surround speakers at the
listening position, but most recordings are
made with the surround speakers
positioned between 110˚ and 130˚ from
front centre. Place the speakers against the
wall within this range of angles, initially on a
temporary support that raises the tweeters
approximately to ear height. This will define
whether you position the speakers on the
side or rear wall. If you listen in high-
backed chairs, or if the speakers are
otherwise obscured, it may be
advantageous to raise them higher.
Satisfactory results can be obtained with
them up to approximately 60cm (2 feet)
above ear height.
With all speakers positioned for initial
listening tests, listen to a wide variety of
programme material – 5.1 channel audio,
action and small scale movies – and sit in
all likely listening positions. Pay particular
attention to the surround information and
the stability of the images.
If the imaging is unsatisfactory, for example
if it becomes too one sided at the extremes
of the listening area, or if you cannot place
the speakers within the preferred range,
you may be better off aiming for a more
diffuse sound field. This can give more
acceptable results in difficult situations. Try
moving the speakers so they are more off-
axis to the listeners. It may also be
advantageous to raise the speakers well
above ear height.
Once you have found the optimum position,
fix the speaker permanently in position.
As a front centre speaker:
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.
As a front left and right speaker:
Space the speaker between 0.5m (20 in)
and 1m (40 in) from the side of the screen.
If the centre speaker is behind an
acoustically transparent screen, position
the left and right front speaker as nearly as
possible at the same height. If the centre
speaker is above or below the screen, the
height of the left and right speaker should
be between the height of the centre
speaker and the centre of the screen.
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.
2-Channel Audio
Mount the speakers so that the tweeters
are approximately at ear level.
As an initial guide: (figure 3)
• Position the speakers and the centre of
the listening area approximately at the
corners of an equilateral triangle.
• Keep the speakers at least 1.5m apart to
maintain left – right separation.
If the central image is poor, try moving the
speakers closer together.
Fine tuning
Before fine tuning, double check that all the
connections in the installation are correct
and secure.
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.
Reduce them by the use of irregular
shaped surfaces such as bookshelves and
large pieces of furniture.
For the most discerning listening, remove
the cloth covered grille as described below
in the section “Aftercare”.
If you want to reduce the bass level without
moving the speakers further from the wall,
fit the foam plugs in the port tubes (figure 4).
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.
Aftercare
The veneers normally only require dusting.
If you wish to use an aerosol cleaner,
remove the grille first by gently pulling it
away from the cabinet. Spray onto the
cleaning cloth, not directly the cabinet. The
grille fabric may be cleaned with a normal
clothes brush after removing.
Avoid touching the drive units, especially
the tweeter, as damage may result.
Français
Garantie limitée
Cher Client,
Bienvenue à B&W.
Ce produit a été conçu et fabriqué en vertu
des normes de qualité les plus rigoureuses.
Toutefois, en cas de problème, B&W
Loudspeakers et ses distributeurs
nationaux garantissent une main d’œuvre
(exclusions possibles) et des pièces de
rechange gratuites dans tout pays desservi
par un distributeur agréé de B&W.
Cette garantie limitée est valide pour une
période de cinq ans à compter de la date
d’achat ou une période de deux ans pour
les composants électroniques, y compris
les haut-parleurs amplifiés.
Conditions
1 La garantie est limitée à la réparation
de l’équipement. Les frais de transport
ou autres, les risques associés à
l’enlèvement, au transport et à
l’installation des produits ne sont pas
couverts par cette garantie.
2 La garantie est exclusivement réservée
au propriétaire d’origine et ne peut pas
être transférée.
3 Cette garantie ne s’applique qu’aux
produits faisant l’objet de vices de
matériaux et/ou de construction au
moment de l’achat et ne sera pas
applicable dans les cas suivants :
a. détériorations entraînées par une
installation, connexion ou un emballage
incorrect,
b. détériorations entraînées par un usage
autre que l’usage correct décrit dans le
manuel de l’utilisateur, la négligence,
des modifications ou l’usage de pièces
qui ne sont pas fabriquées ou agréées
par B&W,
c. détériorations entraînées par un
équipement auxiliaire défectueux ou
qui ne convient pas,
d. détériorations résultant de : accidents,
foudre, eau, chaleur, guerre, troubles
de l’ordre public ou autre cause ne
relevant pas du contrôle raisonnable de
B&W ou de ses distributeurs agréés,
e. les produits dont le numéro de série a
été modifié, effacé, éliminé ou rendu
illisible,
f. les produits qui ont été réparés ou
modifiés par une personne non
autorisée.
4 Cette garantie vient en complément à
toute obligation juridique nationale /
régionale des revendeurs ou
distributeurs nationaux et n’affecte pas
vos droits statutaires en tant que
client.
Comment faire une réclamation
en vertu de la garantie
Veuillez respecter la procédure ci-dessous,
si vous souhaitez faire une réclamation
sous garantie :
2