User manual B&W CWM DS8

[. . . ] wARNING: The speakers produce a static magnetic field. 5m (20in) of equipment that may be affected by such a field (eg Cathode Ray Tubes in TVs and Personal Computers). Since its foundation in 1966, the continuing philosophy of B&W has been the quest for perfect sound reproduction. Inspired by the company's founder, the late John Bowers, this quest has entailed not only high investment in audio technology and innovation but also an abiding appreciation of music and movies to ensure that the technology is put to maximum effect. [. . . ] 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 if 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. 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. The choice of monopole or dipole mode may depend on the type of programme being played, the speaker's position in the installation and, of course, personal preference. Multi-channel music often has more directional cues in the surround sound field and it may be preferable to have all the speakers set to monopole. Movie sound is usually more convincing with a diffuse sound field and it is usual to set at least the side speakers to dipole. 1 installations are sometimes set to monopole, even if the side speakers are set to dipole, but dipole all round is also an option. experiment to find the best settings for your situation. The 12V trigger option may be used to automatically set different modes for different types of programme. Some processors can detect whether the programme being played is music or movie and assign a trigger accordingly. Some others can assign a trigger to the input socket being used and you may wish to use a different player for music than that used for movies. 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 7) In the ceiling, drape the matting at the back of the ceiling board, covering the aperture and extending at least 30cm (1 ft) around the speaker into open void. (figure 8) IMPORTANT: Ensure that the materials you use meet local fire and safety regulations. 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. 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. [. . . ] 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 5) 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. [. . . ]