Bowers & Wilkins CWM DS8: instruction

Custom Installation Series

CWM DS8

Owner’s Manual

and Warranty

Contents

English

Русский

Limited Warranty...........2

Ограниченная

Owner’s Manual............2

гарантия....................20

Руководство по

Français

эксплуатации ............20

Garantie limitée.............4

Manuel d’utilisation.......4

"esky

Záruka .......................23

Deutsch

Návod k pouãití..........23

Garantie .......................6

Bedienungsanleitung.....6

Magyar

Korlátozott garancia ..25

Español

Használati útmutató ...25

Garantía limitada...........8

Manual de

Polski

instrucciones................9

Gwarancja .................27

Instrukcja

Português

uÃytkownika ...............27

Garantia limitada.........11

Manual do utilizador....11

.......................29

Italiano

.....................29

Garanzia limitata.........13

Manuale di istruzioni ...14

.......................31

Nederlands

....................31

Garantie .....................15

Handleiding ................16

Ελληνικά

Περιορισµένη

εγγύηση....................17

Οδηγίεσ Χρήσεωσ ....18

1

where the equipment can be serviced.

In solid wall construction, be prepared to

English

You can call B&W in the UK or visit our

provide a cavity in the wall that extends

web site to get the contact details of

outside the boundaries of the speaker’s

your local distributor.

frame, otherwise bass performance will be

Limited Warranty

compromised.

To validate your warranty, you will need to

Dear customer, welcome to B&W.

produce this warranty booklet completed

The speakers are balanced for half-space

and stamped by your dealer on the date of

mounting (ie flush in a wall or ceiling).

This product has been designed and

purchase. Alternatively, you will need the

Placement near a wall/ceiling junction or in

manufactured to the highest quality

original sales invoice or other proof of

a corner may give rise to too much bass

standards. However, if something does go

ownership and date of purchase.

and a boomy quality to the sound. Try to

wrong with this product, B&W

keep the speakers at least 0.5m (20in) from

Loudspeakers and its national distributors

wall/ceiling edges.

warrant free of charge labour (exclusion

may apply) and replacement parts in any

The following sections give guidance on

Owner’s manual

country served by an official B&W

optimum positioning, but this may be

distributor.

modified in line with domestic constraints.

This limited warranty is valid for a period of

Introduction

WARNING: The speakers produce a static

five years from the date of purchase or two

magnetic field. They should not be placed

Thank you for purchasing Bowers and

years for electronics including amplified

within 0.5m (20in) of equipment that may

Wilkins CWM speakers.

loudspeakers.

be affected by such a field (eg Cathode

Since its foundation in 1966, the continuing

Ray Tubes in TVs and Personal

Terms and Conditions

philosophy of B&W has been the quest for

Computers).

perfect sound reproduction. Inspired by the

1 The warranty is limited to the repair of

company’s founder, the late John Bowers,

Surround speakers

the equipment. Neither transportation,

this quest has entailed not only high

nor any other costs, nor any risk for

The speakers should be positioned 60cm

investment in audio technology and

removal, transportation and installation

(2 ft) or more above head height.

innovation but also an abiding appreciation

of products is covered by this warranty.

of music and movies to ensure that the

5.1 channel

2 This warranty is only valid for the

technology is put to maximum effect.

If it is desired to use both dipole and

original owner. It is not transferable.

These CWM speakers are primarily

monopole modes, the horizontal angle to

3 This warranty will not be applicable in

intended for in-wall applications, but may

the centre of the listening position should

cases other than defects in materials

equally well be used in-ceiling.

be approximately 120º round from the

and/or workmanship at the time of

centre of the screen. (figure 1)

However, no matter how good the speakers

purchase and will not be applicable:

themselves, they will not deliver their full

If only dipole mode is required, position the

a. for damages caused by incorrect

potential unless properly installed. Please

speakers in line with the centre of the

installation, connection or packing,

read through this manual fully. It will help

listening area. (figure 2)

you optimise the performance of the

b. for damages caused by any use other

6.1 channel

system.

than correct use described in the user

Position two speakers to the sides in line

manual, negligence, modifications, or

B&W distributes to over 60 countries

with the centre of the listening area and

use of parts that are not made or

worldwide and maintains a network of

one centrally behind the listeners (figure 3)

authorised by B&W,

dedicated distributors who will be able to

help should you have any problems your

7.1 channel

c. for damages caused by faulty or

dealer cannot resolve.

unsuitable ancillary equipment,

Position two speakers to the sides in line

with the centre of the listening area and

d. for damages caused by accidents,

Check the contents

two behind the listeners, subtending an

lightning, water, fire heat, war, public

This pack should contain:

angle of approximately 40º. (figure 4)

disturbances or any other cause

beyond the reasonable control of B&W

• wall frame

PREPARING THE LOCATION

and its appointed distributors,

• baffle with drive units and crossover

• grille with backing scrim fabric

e. for products whose serial number has

Choosing cable

• paint mask

been altered, deleted, removed or

• mounting template

Excessive resistance in the speaker cable

made illegible,

• 6x M6 screw

wastes power and alters the frequency

f. if repairs or modifications have been

response of the speaker. Always try to keep

executed by an unauthorised person.

Choosing the position

the resistance as low as possible with the

loop resistance preferably below 0.5 ohms

4 This guarantee complements any

Check that there is no conflict with other

for non-critical applications and below

national/regional law obligations of

installations (pipe work, air conditioning,

0.2 ohms for best results. Use the table of

dealers or national distributors and

power cabling etc.). In existing drywall

figure 14 to calculate the minimum gauge

does not affect your statutory rights as

construction, use a stud-finding tool to

of cable required.

a customer.

map the construction accurately and a pipe

detector to scan the proposed installation

If remote switching between monopole and

How to claim repairs under

position.

dipole modes is required, an extra 2-core

warranty

cable is needed for the 12V trigger. At the

Refer to the section drawing of the speaker

speaker end, strip back the insulation to

Should service be required, please follow

and ensure that there is enough clearance

leave bare wire ends. It is usual for the 12V

the following procedure:

behind the plasterboard (sheetrock) for the

trigger output of a processor to take a

clamps to swing out fully.

1 If the equipment is being used in the

3.5mm jack plug.

country of purchase, you should

Avoid installing the speakers in the same

contact the B&W authorised dealer

cavity as flimsy ducting, which may be

Existing drywall construction

from whom the equipment was

induced to rattle.

(retrofit)

purchased.

The speakers are designed to operate

Position the template at the desired

2 If the equipment is being used outside

satisfactorily in a wide range of cavity

location of the speaker. The template is

the country of purchase, you should

volumes, ideally above 20 litres (0.7 cu ft),

marked with both vertical and horizontal

contact B&W national distributor in the

so make sure the volume is not too

centre lines to aid alignment.

country of residence who will advise

restricted by cross studs.

2

Trace round the outer edge of the template

flange as a guide. Depending on the

remove the baffle, loosen the clamps and

and cut neatly just inside the line.

diameter of the router, you may need to

re-tighten them more evenly.

square off the corners with a saw.

To improve the mechanical integrity of the

Fine tuning

wall and reduce the likelihood of rattles, we

In all cases, we recommend not using

recommend you apply a bead of wood glue

cement or mortar to fix the back box into

The choice of monopole or dipole mode

or mastic along the joints between the back

the brick or blockwork. rattles are best

may depend on the type of programme

of the plasterboard and the studs in the

avoided by using flexible mastic and

being played, the speaker’s position in the

vicinity if the speaker.

wedges. (figure 6)

installation and, of course, personal

preference.

Run the cable to the aperture, allowing

Damping the cavity

enough length to comfortably connect the

Multi-channel music often has more

speaker, but not too much, as the excess

Fill the wall cavity or back box, but not the

directional cues in the surround sound field

may rattle against the structure.

space immediately behind the speaker, with

and it may be preferable to have all the

unlined fibreglass or mineral wool matting.

speakers set to monopole. Movie sound is

New drywall construction

The packing density should be just enough

usually more convincing with a diffuse

to comfortably prevent the material from

sound field and it is usual to set at least the

The speaker can be installed once the wall

dropping or sagging over time. In an open

side speakers to dipole. Rear speakers in

is completed in the same manner as

wall cavity, fill to a distance of at least

6.1 and 7.1 installations are sometimes set

retrofitting, but it is easier to position and

30cm (1 ft) above and below the speaker.

to monopole, even if the side speakers are

cut the hole if the optional pre-mount kit is

(figure 7)

set to dipole, but dipole all round is also an

used before the plasterboard (sheetrock) is

option. Experiment to find the best settings

fitted.

In the ceiling, drape the matting at the back

for your situation.

of the ceiling board, covering the aperture

Staple or nail the PMK to the studs as

and extending at least 30cm (1 ft) around

The 12V trigger option may be used to

described in the instructions with the kit.

the speaker into open void. (figure 8)

automatically set different modes for

Run the cable and secure it to the fixing

different types of programme. Some

point on the PMK. Allow enough length to

IMPORTANT: Ensure that the materials you

processors can detect whether the

comfortably connect the speaker, but not

use meet local fire and safety regulations.

programme being played is music or movie

too much, as the excess may rattle against

and assign a trigger accordingly. Some

the structure.

Fitting the speaker

others can assign a trigger to the input

Results are affected by how well the

All connections should be made with the

socket being used and you may wish to

plasterboard is attached to the studs and

equipment switched off.

use a different player for music than that

we recommend gluing as well as screwing

used for movies.

With the grille removed, position the wall

or nailing the panels to the studs in the

frame in the aperture and screw in the

vicinity of the speaker.

Customising

6 screws visible from the front. (figure 9)

Once the board is fitted, the inner flange of

These screws automatically swing out

The frame has a paintable white semi-matte

the PMK serves as a guide for a hole router

clamping dogs that locate behind the

finish, ready if necessary to be re-finished

or saw.

mounting surface. Ensure that they have

to match your own decor. If you do not

located properly before fully tightening the

wish to remove the speaker baffle, fit the

If extra acoustic isolation to adjoining

screws. A certain amount of flexing of the

paint mask before re-finishing. Do not

rooms is required or some protection

frame is allowed to take up unevenness in

re-finish the drive units or baffle area

against the spread of fire, use the optional

the mounting surface, but do not

behind the grille. Avoid touching the drive

back box in place of the PMK. Follow the

overtighten the screws as excessive

units, as damage may result.

instructions with the back box for fitting

distortion of the speaker frame may result.

and running the cable.

Before painting the grille, peel off the fabric

If required, the wall frame and grille mesh

scrim from the back, otherwise the pores

When fitting the plasterboard, use mastic

should be painted at this stage, before

will get clogged and the sound will be

between the sheets and the back box to

fitting the baffle. See also the section

impaired. If the scrim does not stay in place

avoid rattles. Rout or saw out the speaker

“Customising” below.

properly when replaced, spray the back of

aperture using the backbox flange as a

the grille mesh (NOT the scrim) with a light

guide. Depending on the diameter of the

Connect the signal cable to the gold plated

coating of 3M SprayMount adhesive or

router, you may need to square off the

spring loaded input terminals on the

similar.

corners with a saw.

crossover and the trigger cable, if used, to

the plastic spring terminals. Ensure the

Solid wall construction

correct polarity is observed in both cases.

(figure 10)

In order for the bass performance not to be

compromised, the speaker requires a cavity

There are 2 switches on the crossover. One

volume of at least 20 litres (0.7 cu ft). This

is marked ‘dipole’ and ‘monopole’. In the

means that, in a standard 10cm (4 in) thick

‘dipole’ position, the speaker is in dipole

wall, the cavity will extend beyond the

mode, whatever the status of the 12V

boundaries of the speaker frame. It is

trigger. In the ‘monopole’ position, the

possible to provide this cavity simply by using

speaker is in monopole mode unless 12V is

a lintel, covering the hole with plasterboard

applied to the trigger input, when the

and fitting the speaker as described above for

speaker becomes dipole.

retrofitting into a drywall. (figure 5) However,

The second switch is marked ‘A’ and ‘B’.

the back box provides a useful means of

When viewed from the front, the positive

defining the minimum volume required.

dipole lobe goes to the right of the speaker

Follow the instructions with the back box for

when the switch is at ‘A’ and to the left

fitting and running the cable. If using a wet

when the switch is at ‘B’. (figure 11). Set

plaster finishing method, first paint a layer of

the lobes as shown in figure 12, according

PVA adhesive onto the back box before

to the position of the speaker.

plastering to avoid rattles as a result of the

Fit the baffle into the wall frame using the 6

plaster shrinking away from the back box as

screws provided. (figure 13)

it dries.

Fit the grille mesh. If the slot width has

If using plasterboard, stick the sheets to the

become distorted by overtightening the wall

surfaces of the back box using flexible

frame clamps, it will be necessary to

mastic. Rout out the aperture using the

3