User manual B&W CDM7 SE

[. . . ] Failure to observe correct polarity will result in poor sound balance and image focusing. when bi-wiring the speakers , loosen the terminal caps and remove the links. Use a separate twin cable from the amplifier terminals to each pair of speaker terminals (figure 3). [. . . ] Conversely, if you need more bass, move the speakers closer to the walls. Space behind the speakers also improves the impression of perspective on well recorded material. If the central image is poor, try moving the speakers closer together or toeing them in so they point at or just in front of the listening area (figure 5). If the sound is too harsh, increase the amount of soft furnishing in the room. Conversely reduce the amount of soft furnishing if the sound is dull and lifeless. Test for flutter echoes by clapping your hands and listening for rapid repetitions. These can smear the sound, but may be reduced by irregular shaped surfaces such as bookshelves and large pieces of furniture. Whenever possible fit the spike feet supplied after you have optimised the positioning. Initially, screw the lock nuts fully onto the spikes and screw the spikes fully into the threaded inserts in the base of the cabinet. If the cabinet rocks, unscrew the two spikes that do not touch the floor equally until the cabinet sits firmly on the floor, and lock them in place by tightening the lock nuts against the cabinet. If there is no carpet and you wish to avoid scratching the floor surface, use a protective disc between the spike and the floor. 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 to ensure that the technology is put to maximum effect. It is also our policy to make sure the advanced features pioneered on one product are incorporated into others we manufacture. CDMTM systems have cabinets with contoured edges to reduce sound diffraction (the reradiation of sound waves from sharp edges that interfere with and blur the direct sound from the drive units), incorporating woven Kevlar® cone bass/midrange drive units for lowest coloration and maximum definition. They also have alloy dome tweeters with magnetic fluid cooling to ensure good definition to the limits of audibility and maintain dynamics to high sound levels. [. . . ] If you wish to use an aerosol cleaner, remove the grille first by gently pulling it away from the cabinet. The grille fabric may be cleaned with a normal clothes brush after removing the grille from the cabinet. Avoid touching the drive units, especially the tweeter, as damage may result. [. . . ]