User manual B&W CDM 1NT

[. . . ] Although many of these have been developed initially for the more expensive models, our "waterfall" design policy has seen them incorporated, wherever possible, elsewhere in the product range. Features to be found in the CDMTMNT Series include cabinets with contoured edges to reduce sound diffraction (the radiation of sound waves from sharp edges that interfere with and blur the direct sound from the drive units). an integral part of the CDMTMNT range is the use of Kevlar® cone bass/midrange drive units for lowest coloration and maximum definition. [. . . ] If you have a carpet, use carpet-piercing spikes and adjust them to take up any unevenness in the floor. (Figure 3) All connections should be made with the equipment switched off. There are 2 pairs of terminals at the back of the speaker which permit bi-wiring if desired. On delivery, the separate pairs are connected together with high-quality links for use with a single 2-core cable. For single cable connection, leave the links in place and use either pair of terminals on the speaker. ensure the positive terminal on the speaker (marked + and coloured red) is connected to the positive output terminal of the amplifier and negative (marked ­ and coloured black) to negative. To bi-wire, remove the links by loosening the terminal caps and use a separate 2-core cable from the amplifier to each pair of terminals. When bi-wiring, incorrect connection can also impair the frequency response. Keep the total impedance below the maximum recommended in the specification and use a low inductance cable to avoid attenuation of the highest frequencies. 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. As a guide, allow up to a week for the temperature effects to stabilise and 15 hours of average use for the mechanical parts to attain their intended design characteristics. If you wish to use an aerosol cleaner, remove the grille first buy gently pulling it away from the cabinet. The grille fabric may be cleaned with a normal clothes brush whilst the grille is detached from the cabinet. [. . . ] Even small changes in the position of the speakers or the listeners can have a profound effect on how these resonances affect the sound. If the central image is poor, try moving the speakers closer together or toeing them in so they point just in front of the listeners. (Figure 2b) If the sound is too harsh, increase the amount of soft furnishings in the room (for example use heavier curtains), or reduce it if the sound is dull and lifeless. [. . . ]