Bowers & Wilkins CDM1 - Manual (Page 3)

C O N N E C T I O N S
(figwre 3)
All connections should be mode with
the equipment turned off.
There ore two pairs of gold plated
terminals at the bock of each speoker (one
pair to the bass/midrange and one pair to
the tweeter) which permit bi*wiring or bi>
amplificotion if desired. On delivery, both
pairs ore connected together by high*
quality gold plated copper links for use
with o single twin cable. To remove the
links, simply loosen the terminal caps.
The use of seporote cables to the two
drive units can improve the reproduction of
low'level detail by reducing interaction in
the crossover ond allowing optimum choice
of cable for each frequency ronge. When
choosing coble, keep its total impedance
(out and bock) below the moximum
recommended in the specification. In
particular the coble to the tweeter should
have low inductance, otherwise the very
high frequencies will be ottenuated. Ask
your dealer for advice, os the optimum
cable will depend on the length required.
The terminals accept bare wires or 4mm
(0.16in) dia bonona plugs. Connect the
positive terminols on the speaker (marked
+ and with a red band) to the positive
terminal on the power amplifier ond
negotive (•, block) to negative. Foiluro to
observe correct polarity will result in poor
sound balance ond imoging. Make sure the
terminal caps are screwed down tight even
when using banano plugs, os otherwise
they may rattle.
F I N E T U N I N G
Before fine tuning the instollation,
double check the polorily and security of
the connections.
if the level of boss is uneven with
frequency, this is usually duo to strong
excitation of resonance modes in the room.
Even small changes in the position of the
speakers within the listening room can
hove o profound effect on the perceived
sound quality by altering the excitation of
these modes. Try mounting the speakers
along o different woll. Even moving lorge
pieces of furniture obout can hove an
effect.
If the generol level of boss is too high
and you cannot move the speakers further
from the wells, reduce the port output by
inserting the foam plugs provided
(figure 4).
If the centro! image is poor, try moving
the speakers closer together or toeing
them in so they point ot or just in front of
the listening area (figure 2b).
If the sound is too harsh, increase the
amount of soft furnishing in the room. For
example, use heavier curtoins. Conversely
reduce the amount of soft furnishing if the
sound is dull and lifeless.
Test for flutter echoes by clapping your
hands and listening for rapid repetitions.
These can smear the sound, but may be
reduced by irregular shaped surfoces such
as bookshelves and large pieces of
furniture.
Ensure the speaker stands are firm on
the floor. If you have o carpet, use carpet
piercing spikes and adjust them to take up
any unevenness in the floor surface.
A F T E R C A R E
The real wood veneers ore locquer
finished ond normolly only require dusting.
If you wish to use on aerosol cleoner,
remove the grille first by gently pulling it
away from the cabinet. Sproy onto the
cloth, not directly onto the eobinet. The
cloth may be cleaned with o normol clothes
brush öfter removing the grille from the
cabinet.
Avoid touching the drive units,
especiolty the tweeter, as domoge moy
result.
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