Bowers & Wilkins DIAMOND 800 Serie Manual Del Usuario página 6

3. Connections
Important Safety Notice
All connections should be made with
the audio equipment switched off. When
using audio equipment in normal operation, touching
uninsulated speaker terminals or wiring may result in
an unpleasant sensation.
The 805 D4 and 804 D4 speaker terminals accept
a variety of cable terminations: 4mm banana plugs,
6mm and 8mm (1/4 in and 5/16 in) spades, or bare
wires up to 4mm (5/32 in) diameter.
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. If you are using
the products in any country where these conditions
apply, you should ensure that any banana plugs cannot
be used in an unsafe manner by children or other
uninformed persons. The plastic pins can be removed
if you wish to use banana plugs.
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.
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There are two pairs of terminals at the back of each
speaker that enable bi-wiring (top). For single wire
connection, fit the supplied link wires to join the like
polarity terminals together. Bi-wiring can improve the
resolution of low-level detail.
Ensure that the positive terminals on the speaker (with
red ring) are connected to the positive output terminal
on the amplifier and the negative terminals on the
speaker (with black ring) are always connected to the
negative output terminal on the amplifier. Incorrect
connection will not result in damage but will cause poor
stereo imaging and loss of bass. Always screw the
terminal caps down fully to prevent rattles.
4. Fine Tuning and Running In
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. (805 D4 only) If
you want to reduce the volume of bass without moving
the speakers further from the wall, fit the foam plugs
or, for less severe bass reduction, the foam rings in the
port tubes (above).
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 angle them inward so that they point
at a location just in front of the listening position.