Bowers & Wilkins CCM7 Series User manual

English
CCM7

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Welcome to Bowers and Wilkins and the CCM7 Series
Thank you for choosing Bowers & Wilkins. When John Bowers first established our company he did
so in the belief that imaginative design, innovative engineering and advanced technology were keys
that could unlock the enjoyment of audio in the home. His belief is one that we continue to share and it
inspires every product we design.
The CCM7 Series of ceiling mount speakers are designed to offer easy installation and very
high quality audio reproduction for discrete custom install applications. This manual describes the
installation of CCM7 Series speakers within conventional stud and sheetrock (joist and plasterboard)
ceilings. It begins by listing the contents of the CCM7 series carton.

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2. CCM7 Series Basics 3. Positioning CCM7 Series Speakers1. CCM7 Carton Contents
CCM7 Series ceiling mount speakers comprise a
bafe carrying the speaker drivers and crossover,
an integrated back-box and front ange, and a
magnetically secured grille. The back box is connected
via external terminals to the speaker cables with the
bafe connecting automatically as it is inserted in the
back box.
CCM7 Series require a ceiling cut-out aperture of
332mm x 332mm (13.07 in x 13.07 in) and a minimum
clear depth of 194.5mm (7.66 in) from the front of the
ceiling surface.
Before installing CCM7 Series speakers you should
ensure that the ceiling locations chosen are free of
obstructions such as pipe work, ducting or wiring that
will interfere with the installation. In existing dry-wall
construction, use a stud-nding tool to help you map
the ceiling construction and a pipe detector to scan the
proposed installation locations.
Some stages of the CCM7 Series installation process
are best carried out by two people working together.
CCM7 Series speaker assembly (bafe, frame/back •
box, grille)
Cut-out template•
Paint mask•
Document pack containing Quick Start Guide and •
Warranty information
Environmental Information
All Bowers & Wilkins products are
designed to comply with international
directives on the Restriction of Hazardous
Substances (RoHS) in electrical and electronic
equipment and the disposal of Waste Electrical
and Electronic Equipment (WEEE). These symbols
indicate compliance and that the products must be
appropriately recycled or processed in accordance
with these directives. Consult your local waste disposal
authority for guidance.
The appropriate position for CCM7 Series speakers
within the listening environment will depend on their
specic application:
General Background Audio Applications
For applications where single CCM7 Series speakers
are required to operate independently to provide
background audio, they can be located substantially as
installation convenience and architecture dictate. The
only acoustic constraint to bear in mind is that corner
locations will result in signicantly emphasised low
frequencies and should be avoided.
Stereo Audio Applications
For applications where a pair of CCM7 Series speakers
is to be used for conventional stereo reproduction, they
should be located between 3m (10 ft) and 5m (16.5 ft)
apart and a similar distance in front of the listening
area. Try to avoid corner locations for the speakers
and to ensure that acoustic environment around each
speaker is similar. The diagram above illustrates this
application.
Note: Different acoustic environments might be,
for example, a bare wall and a heavily curtained
window.
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4. Installing CCM7 Series Speakers
Multi-channel Audio Applications
For applications where multiple CCM7 Series speakers
are to be used for multi-channel audio visual systems,
the centre speaker should be on the centre line of the
screen and the front speakers each laterally within
approximately 0.5m (20 in) of the sides of the screen.
Surround channel CCM7 Series speakers should be
located just behind and either side of the listening
position. Try to avoid corner locations for any of the
speakers and to ensure that acoustic environment
around each front and surround speaker is similar. The
diagram above illustrates this application.
Note: Different acoustic environments might be,
for example, a bare wall and a heavily curtained
window.
In all cases CCM7 Series speakers should be oriented
so that their tweeters face generally towards the
listening area. Speaker orientation is dened by the
installed orientation of the back box. See Section 4.
Note: CCM7 Series speaker dispersion can be
adjusted to accommodate use in centre or left,
right and surround channel roles. The dispersion
is adjusted via a switch on the cross-over. See
Paragraph 4.7 for more information.
Note: The nature of the installation of ceiling
speakers means that it is sometimes impractical to
locate them in the acoustically ideal positions. In
these cases they should be located as close as is
practical to the ideal positions. Your local Bowers
and Wilkins retailer will be able to offer advice if
required.
Note: CCM7 Series drive units create stray
magnetic fields. We recommend that magnetically
sensitive items such as CRT screens and magnetic
cards for example, are kept at least 0.5m (20 in)
from the speaker. LCD, OLED and plasma screens
are not affected by magnetic fields.
To install a CCM7 Series speaker proceed as
described in the following paragraphs:
4.1 Using the supplied cut-out template, mark a cut
line on the existing ceiling. Check the cut line denes
the correct 332mm x 332mm dimensions. Cut along
the line with an appropriate tool to create a square
aperture in the ceiling.
Note: Ensure that there is enough free space
internally adjacent to the aperture for the back box
clamps to rotate fully. 20mm (0.79 in) free space is
required.
Note: To reduce the possibility of the ceiling buzzing
or rattling, adhesive mastic can be applied between
the studs and sheetrock in the vicinity of the
speaker aperture.

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4.2 If speaker cable is already present in the ceiling
space, pull the cable down through the aperture. If
speaker cables are not already installed this should be
done at this stage. It is likely that you will need to gain
access through the oor above to route the cables
through the ceiling space.
Leave enough spare cable through the aperture to
ease connection to the speaker back box, but not so
much that it is likely to buzz or rattle when pushed
back up into the ceiling space. Approximately 1.0m (40
in) is appropriate.
Note: Always use high quality, low resistance
speaker cable. Low resistance is especially
important if the length of cable from amplifier to
speaker exceeds 5.0m. Your local Bowers and
Wilkins retailer will be able to offer advice on
speaker cable selection if required.
4.3 CCM7 Series speaker back boxes are tted with
a safety hook feature that enables a safety chain or
cable to be attached and then secured to a structural
element within the ceiling – typically a stud (joist). We
strongly recommend the safety hook feature is used.
The diagram above illustrates the use of the safety
hook.
4.4 Now connect the speaker cable to the spring
terminals on the side of the back box, rst looping the
cable around the strain relief bar. A second person
will be required to hold the back box while the cable
is connected. The diagram above illustrates the cable
connection.
Ensure that the speaker connection polarity is
correct: the cable connected to the positive terminal
on the amplier should be connected to the red
spring terminal on the back box. Similarly, the cable
connected to the negative terminal on the amplier
should be connected to the black spring terminal on
the back box.
Note: If an amplifier is already connected to the
cable it should be switched off while connections
are being made to the back box.
4.5 With the back box connected it may be lifted up
into the ceiling aperture. Correct back box orientation
must be established at this stage: the red arrow on
the back box ange should be pointing towards the
listening area.
Ensure that the clamps are retracted so that they will
pass through the aperture then lift the back box up so
that the ange is ush on the ceiling. Take care that the
cable is not trapped. One person should hold the back
box in place while a second tightens the eight clamp
screws. The diagram above illustrates insertion of the
back box.

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4.6 If the back box ange is to be painted it should be
done at this stage. Any conventional, domestic paint
may be applied by brushing, rolling or spraying. Use
the supplied paint mask to avoid getting paint in the
back box cavity. Painting without using the paint mask
risks contamination of the internal connection terminals
or the grille attachment magnets. The diagram above
illustrates painting using the paint mask.
Note: If the grille is to be sprayed this should be
done “off-line” before it is fitted.
4.7 If the speaker is to be used in the centre channel
role in a multi-channel system, select the centre
position on the cross-over mounted dispersion switch.
In all other applications select the left/right position
on the switch. The diagram above illustrates the
dispersion switch.
LR
CENTRE
LR
CENTRE

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4.8 The bafe can now be lifted up into the back box.
Ensure that the connector on the bafe is oriented
correctly with the connector inside the back box.
The bafe is held in the back box by four push-
lock fasteners. push-lock fasteners are secured by
pushing the head inwards – either with a thumb or a
screwdriver. As they secure, the fasteners will click.
With one person holding the bafe in place, a second
person can push and secure the four push-lock
fasteners. The fasteners will click three times. The
bafe will then be secure in the back box. The diagram
above illustrates inserting the bafe and securing the
push-lock fasteners.
Note: Push-lock fasteners are unsecured by turning
them 45° using a screwdriver.
4.9 The grille can now be tted to the bafe. It is held in
place magnetically so simply needs to be aligned with
the groove in the back box ange where it will click into
place. The diagram above illustrates tting the grille.
The CCM7 Series speaker is now installed and ready
for use.
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Issue 2
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