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2 If the equipment is being used outside the country of purchase, you should contact B&W national distributor in the country of residence who will advise where the equipment can be serviced. You can call B&W in the UK or visit our web site to get the contact details of your local distributor. To validate your warranty, you will need to produce this warranty booklet completed and stamped by your dealer on the date of purchase. Alternatively, you will need the original sales invoice or other proof of ownership and date of purchase. Owner’s manual Introduction Thank you for purchasing Bowers and Wilkins CCM speakers. 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. These CCM speakers are intended for in- ceiling applications. They feature adjustment for tweeter angle and output level so that their performance may be tailored to a wide variety of practical conditions. However, no matter how good the speakers themselves, they will not deliver their full potential unless properly installed. Please read through this manual fully. It will help you optimise the performance of the system. B&W distributes to over 60 countries worldwide and maintains a network of dedicated distributors who will be able to help should you have any problems your dealer cannot resolve. Check the contents This pack should contain: 2x Frame/baffle with drivers and crossover 2x Grille 2x Paint mask 2x Mounting template Choosing the position Check that there is no conflict with other installations (pipe work, air conditioning, power cabling etc.). In existing drywall construction, use a stud-finding tool to map the construction accurately and a pipe detector to scan the proposed installation position. Ensure that there is enough clearance behind the plasterboard (sheetrock) for the clamps to swing out fully. Avoid installing the speakers in the same cavity as flimsy ducting, which may be induced to rattle. The speakers are designed to operate satisfactorily in a wide range of cavity volumes, ideally above 10 litres (0.4 cu ft), so make sure the volume is not too restricted. The speakers are balanced for half-space mounting (ie flush in a ceiling or soffit). Placement near a wall/ceiling junction or in a corner may give rise to too much bass and a boomy quality to the sound. Try to keep the speakers at least 0.5m (20in) from wall/ceiling edges. The following sections give guidance on optimum positioning, but this may be modified in line with domestic constraints. WARNING: The speakers produce a static magnetic field. They should not be placed within 0.5m (20in) of equipment that may be affected by such a field (eg Cathode Ray Tubes in TVs and Personal Computers). Front speakers for audio or home theatre Best imaging for 2-channel is obtained when the speakers are mounted in the ceiling, making an angle between 40. and 60. at the centre of the listening position. (figure 1) For multi-channel home theatre the left and right speakers should be approximately 0.5m (20 in) to the left and right of the screen and about 0.5m (20 in) from the plane of the screen or from the front wall in the case of an audio-only installation. (figure 2) Surround speakers The speakers should be positioned in the ceiling about 0.5m (20 in) away from the wall. 5.1 channel The horizontal angle to the centre of the listening position should be approximately 120. round from the centre of the screen. (figure 3) 6.1 channel Position two speakers to the sides in line with the centre of the listening area and one centrally behind the listeners (figure 4) 7.1 channel Position two speakers to the sides in line with the centre of the listening area and two behind the listeners, subtending an angle of approximately 40.. (figure 5) Distributed audio To maintain clarity and speech intelligibility, it's important that listeners are never too far off axis of the nearest speaker. The speaker spacing will depend on the height of the ceiling and the level of sound required. More speakers played at a lower level will give better clarity. We recommend that the distance between adjacent speakers is no more then 3 times the distance between average ear height and the ceiling. For any given spacing, there will be fewer weak spots with a triangular grid than a rectangular one. (figure 6) 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 10 to calculate the minimum gauge of cable required. Existing drywa...