Manuál Bowers and Wilkins CWM LCR8 Reproduktor

Manuál

PREPARING THE LOCATION

Choosing cable

Excessive resistance in the speaker cable

wastes power and alters the frequency

response of the speaker. Always try to keep

the resistance as low as possible with the

loop resistance preferably below 0.5 ohms

for non-critical applications and below

0.2 ohms for best results. Use the table of

figure 11 to calculate the minimum gauge

of cable required.

Existing drywall construction

(retrofit)

Position the template at the desired

location of the speaker. The template is

marked with both vertical and horizontal

centre lines to aid alignment.

Trace round the outer edge of the template

and cut neatly just inside the line.

To improve the mechanical integrity of the

wall and reduce the likelihood of rattles, we

recommend you apply a bead of wood glue

or mastic along the joints between the back

of the plasterboard and the studs in the

vicinity of the speaker.

Run the cable to the aperture, allowing

enough length to comfortably connect the

speaker, but not too much, as the excess

may rattle against the structure.

New drywall construction

The speaker can be installed once the wall

is completed in the same manner as

retrofitting, but it is easier to position and

cut the hole if the optional pre-mount kit is

used before the plasterboard (sheetrock) is

fitted. Staple or nail the PMK to the studs

as described in the instructions with the kit.

Run the cable and secure it to the fixing

point on the PMK. Allow enough length to

comfortably connect the speaker, but not

too much, as the excess may rattle against

the structure. Results are affected by how

well the plasterboard is attached to the

studs and we recommend gluing as well as

screwing or nailing the panels to the studs

in the vicinity of the speaker. Once the

board is fitted, the inner flange of the PMK

serves as a guide for a hole router or saw.

If extra acoustic isolation to adjoining

rooms is required or some protection

against the spread of fire, use the optional

back box in place of the PMK. Follow the

instructions with the back box for fitting

and running the cable. When fitting the

plasterboard, use mastic between the

sheets and the back box to avoid rattles.

Rout or saw out the speaker aperture using

the backbox flange as a guide. Depending

on the diameter of the router, you may

need to square off the corners with a saw.

Solid wall construction

In order for the bass performance not to be

compromised, the speaker requires a cavity

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

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

wall, the cavity will extend beyond the

boundaries of the speaker frame. It is

possible to provide this cavity simply by using

a lintel, covering the hole with plasterboard

and fitting the speaker as described above for

retrofitting into a drywall. (figure 6) However,

the back box provides a useful means of

defining the minimum volume required.

Follow the instructions with the back box

for fitting and running the cable. If using a

wet plaster finishing method, first paint a

layer of PVA adhesive onto the back box

before plastering to avoid rattles as a result

of the plaster shrinking away from the back

box as it dries. If using plasterboard

(sheetrock), stick the sheets to the surfaces

of the back box using flexible mastic. Rout

out the aperture using the flange as a

guide. Depending on the diameter of the

router, you may need to square off the

corners with a saw. In all cases, we

recommend not using cement or mortar to

fix the back box into the brick or

blockwork. rattles are best avoided by

using flexible mastic and wedges. (figure 7)

Damping the cavity

Fill the wall cavity or back box, but not the

space immediately behind the speaker, with

unlined fibreglass or mineral wool matting.

The packing density should be just enough

to comfortably prevent the material from

dropping or sagging over time. In an open

wall cavity, fill to a distance of at least 30cm

(1 ft) above and below the speaker. (figure 8)

IMPORTANT: Ensure that the materials you

use meet local fire and safety regulations.

Fitting the speaker

All connections should be made with the

equipment switched off.

With the grille and speaker baffle removed,

position the wall frame in the aperture and

screw in the 10 screws visible from the

front. (figure 9) These screws automatically

swing out clamping dogs that locate behind

the mounting surface. Ensure that they

have located properly before fully tightening

the screws. A certain amount of flexing of

the frame is allowed to take up unevenness

in the mounting surface, but do not

overtighten the screws as excessive

distortion of the speaker frame may result

and the grille will be difficult to fit.

Connect the cable, observing the correct

polarity.

Once the wall frame is secure, screw in the

baffle with the drive units and crossover,

using the 8 screws provided. (figure 10)

Check that the grille will slide comfortably

into place without fitting it fully. If it is too

tight, remove the baffle and check the wall

frame clamps for excessive tightening and

distortion.

Customising

The frame has a paintable white semi-matte

finish, ready if necessary to be re-finished

to match your own decor. Remove the grille

and fit the paint mask before re-finishing.

Do not re-finish the drive units or baffle

area behind the grille. Avoid touching the

drive units, as damage may result.

Before painting the grille, peel off the fabric

scrim from the back, otherwise the pores will

get clogged and the sound will be impaired.

If the scrim does not stay in place properly

when replaced, spray the back of the grille

mesh (NOT the scrim) with a light coating of

3M SprayMount adhesive or similar.

Français

Garantie limitée

Cher Client,

Bienvenue à B&W.

Ce produit a été conçu et fabriqué en vertu

des normes de qualité les plus rigoureuses.

Toutefois, en cas de problème, B&W

Loudspeakers et ses distributeurs

nationaux garantissent une main d’œuvre

(exclusions possibles) et des pièces de

rechange gratuites dans tout pays desservi

par un distributeur agréé de B&W.

Cette garantie limitée est valide pour une

période de cinq ans à compter de la date

d’achat ou une période de deux ans pour

les composants électroniques, y compris

les haut-parleurs amplifiés.

Conditions

1 La garantie est limitée à la réparation

de l’équipement. Les frais de transport

ou autres, les risques associés à

l’enlèvement, au transport et à

l’installation des produits ne sont pas

couverts par cette garantie.

2 La garantie est exclusivement réservée

au propriétaire d’origine et ne peut pas

être transférée.

3 Cette garantie ne s’applique qu’aux

produits faisant l’objet de vices de

matériaux et/ou de construction au

moment de l’achat et ne sera pas

applicable dans les cas suivants :

a. détériorations entraînées par une

installation, connexion ou un emballage

incorrect,

b. détériorations entraînées par un usage

autre que l’usage correct décrit dans le

manuel de l’utilisateur, la négligence,

des modifications ou l’usage de pièces

qui ne sont pas fabriquées ou agréées

par B&W,

c. détériorations entraînées par un

équipement auxiliaire défectueux ou

qui ne convient pas,

d. détériorations résultant de : accidents,

foudre, eau, chaleur, guerre, troubles

de l’ordre public ou autre cause ne

relevant pas du contrôle raisonnable de

B&W ou de ses distributeurs agréés,

e. les produits dont le numéro de série a

été modifié, effacé, éliminé ou rendu

illisible,

f. les produits qui ont été réparés ou

modifiés par une personne non

autorisée.

4 Cette garantie vient en complément à

toute obligation juridique nationale /

régionale des revendeurs ou

distributeurs nationaux et n’affecte pas

vos droits statutaires en tant que

client.

Comment faire une réclamation

en vertu de la garantie

Veuillez respecter la procédure ci-dessous,

si vous souhaitez faire une réclamation

sous garantie :

3

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