User manual B&W CM9

[. . . ] 5m and 3m apart at two corners of an equilateral triangle completed by the listening area at the third corner. Check in the carton for: 1 Two-part foam plug 1 Accessory pack containing: 4 M6 spike feet 4 Rubber feet 4 Lock nuts (10mm across flats) and in the CM9 only 1 Plinth 1 Accessory pack containing: 1 Allen key 4 M6 x 35mm screws 4 Plain washers 4 Shakeproof washers If the speakers are to be used for the front channels in a home theatre system, they should be placed closer together than for 2-channel audio, because the surround channels tend to widen the image. 5m of the sides of the screen will also help keep the sound image in scale with the visual image. As with conventional stereo positioning, the speakers should ideally be at least 0. [. . . ] 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. However, longer run-in periods (as long as a month) have been reported and there is evidence to suggest that this has little to do with the speaker changing and more to do with the listener getting used to the new sound. This is especially so with highly revealing speakers such as these, where there may be a significant increase in the amount of detail compared with what the listener has previously been used to; the sound may at first appear too "up front" and perhaps a little hard. After an extended period of time, the sound will seem to mellow, but without losing clarity and detail. Before fine tuning, make sure that all the connections in the installation are correct and secure. Moving the speakers further from the walls will generally reduce the volume of bass. Space behind the speakers will also help to create an aural impression of depth. Conversely, moving the speakers closer to the walls will increase the volume of bass. If you want to reduce the volume of bass without moving the speakers further from the wall, fit the foam plugs or, for less severe bass reduction, the foam rings in the port tubes. fitting a foam plug or ring in a port tube is illustrated in Figure 3. If the bass seems uneven with frequency this will most probably be due to resonance modes in the listening room. Even small changes in the position of the speakers or the listening position can have a profound effect on how these resonances affect the sound. Try moving the listening position or locating the speakers along a different wall. The presence and position of large pieces of furniture can also influence resonance modes. If the central image lacks focus, try moving the speakers closer together or angling them inward so that they point at a location just in front of the listening position. If the sound is too bright, increasing the amount of soft furnishing in the room (heavier curtains for example) may help balance the sound. Conversely, reducing the amount of soft furnishing may help brighten a dull sound. Some rooms suffer from "flutter echoes" ­ echoes that "bounce" between parallel room boundaries. Test for flutter echoes by standing in the middle of the room and clapping your hands. Flutter echoes can be reduced by placing irregular shaped items or non-reflective surfaces, bookshelves, rugs or pictures for example, on one of the offending walls or floor. Use carpet piercing spikes if appropriate and adjust them to take up any unevenness. If you wish to use an aerosol or other cleaner, remove the grille first by gently pulling it away from the cabinet. [. . . ] For products whose serial number has been altered, deleted, removed or made illegible, f. 4 if repairs or modifications have been executed by an unauthorised person. This guarantee complements any national/regional law obligations of dealers or national distributors and does not affect your statutory rights as a customer. Should service be required, please follow the following procedure: 1 If the equipment is being used in the country of purchase, you should contact the B&W authorised dealer from whom the equipment was purchased. [. . . ]