Bowers & Wilkins 805 D3 Manual page 7

Recommended
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
805 D3
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 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.
804 D3
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.
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.
For the most discerning listening, remove the bass/
midrange grilles by gripping around their edges and
gently pulling them away from the cabinet.
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