User manual B&W CWM CINEMA 6

[. . . ] Consult your local waste disposal authority for guidance. Home Theatre Centre Channel Applications The ideal position for a centre channel speaker is behind the centre of the screen, however this can only be realised when using an acoustically transparent projection screen. In most cases the centre speaker will be positioned in a laterally central position either directly above or directly below the screen. Choose the position that is nearest ear height. [. . . ] Fitting the Wall Frame/Baffle (new drywall construction) Figure 5 illustrates this procedure. 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 premount kit (PMK) is used before the plasterboard 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 (sheetrock) is attached to the studs and we recommend you apply a bead of mastic/caulking 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 (sheetrock), use mastic/caulking between the sheets and the back box to avoid rattles. Rout or saw out the speaker aperture using the back-box flange as a guide. Depending on the diameter of the router, you may need to square off the corners with a saw. Fitting the Wall Frame/Baffle (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. 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 (sheetrock) and fitting the speaker as described above for retrofitting into a drywall. (Figure 6) However, the back box provides a useful means of defining a minimum volume. Follow the instructions with the back box for fitting and running the cable. If using a wet plaster finishing method, first apply a thin layer of PVA adhesive (polyvinyl-based caulking) 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/caulking. 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 block-work. [. . . ] Running-in Period The performance of the speaker will change subtly during the initial listening period. If the speaker has been stored in a cold environment, the damping compounds and suspension materials of the drive units will take some time to recover their correct mechanical properties. The drive unit suspensions will also loosen up during the first hours of use. The time taken for the speaker to achieve its intended performance will vary depending on previous storage conditions and how it is used. [. . . ]