User manual B&W DM 330I

[. . . ] 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. B&W distribute to over 50 countries world-wide and maintain a network of dedicated distributors who will be able to help should you have any problems your dealer cannot resolve. 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). Correct polarity connection is even more critical in this case to maintain the frequency response of each speaker as well as the correct balance between left and right speakers. The use of separate cables can improve the reproduction of low-level detail by reducing interaction in the crossover and allowing optimum choice of cable for each frequency range. Always make sure all the terminal caps are screwed down tight, as otherwise they may rattle. When choosing cable, keep the total electrical impedance (out and back) below the maximum recommended in the specification. In particular, the cable to the tweeter should have low inductance, otherwise the very high frequencies will be attenuated. Ask your dealer for advice, as the optimum cable will depend on the length required. If the general level of bass is too high, try moving the speakers further away from the walls. 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. 4 spike feet and 4 lock nuts are taped in recesses in one polystyrene end tray. 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. (figure 2) All connections should be made with the equipment turned off. There are two pairs of terminals at the back of each speaker, one pair to the bass unit and one pair to the tweeter which permit bi-wiring or biamplification if desired. [. . . ] There are two pairs of terminals at the back of each speaker, one pair to the bass unit and one pair to the tweeter which permit bi-wiring or biamplification if desired. On delivery, both pairs are connected together by plated copper links for use with a single twin cable. connect the positive terminal on the speaker (marked + and coloured red) to the positive terminal on the power amplifier and negative (- , black) to negative (figure 2). [. . . ]