Bowers & Wilkins CWM-LCR8 owner manual Français, Garantie limitée, Preparing the Location

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

0.2ohms 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

1La 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.

2La garantie est exclusivement réservée au propriétaire d’origine et ne peut pas être transférée.

3Cette 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.

4Cette 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 :

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