User manual B&W DM 305

[. . . ] This greatly helps to break up the regular internal cabinet volume that would otherwise encourage coloration from internal standing waves. homogeneous fibre cone bass/midrange drive units are used for minimum coloration and maximum definition. The DMTM305 also features a soft dome tweeter with magnetic fluid cooling to ensure good definition to the limits of audibility and maintain dynamics to high sound levels. However, no matter how good the speakers themselves, they must work well into the listening room and time spent on the installation process will reap the reward of many hours listening pleasure. [. . . ] 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. ensure the speakers stand firmly on the floor. Whenever possible fit the spike feet supplied after you have optimised the positioning. These are designed to pierce through carpeting to the floor surface. 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. (figure 4) Some experimentation with the position of the speakers is well worthwhile to optimise the interaction between them and the listening room. However, as an initial guide: Do not fit the spike feet until you have found the best position for the speakers. place the speakers and the centre of the listening area approximately at the corners of an equilateral triangle. 5m (5ft) apart to maintain left-right stereo separation. Having the speakers too close to walls increases the level of bass relative to the midrange and may give a boomy quality to the sound. WARNING: The DMTM305 produces a static magnetic field that extends outside the cabinet boundary. As such The DMTM305 should not be placed within 0. 5m (20in) of equipment that may be affected by such a field, e. [. . . ] Before fine tuning the installation, double check the polarity and security of the connections. If the level of bass is uneven with frequency, this is usually due to strong excitation of resonance modes in the room. Even small changes in the position of the speakers within the listening room can have a profound effect on the perceived sound quality by altering the excitation of these modes. Try mounting the speakers along a different wall. [. . . ]