User manual B&W ASW 1000

[. . . ] 16 Damage Requiring Service ­ The appliance should be serviced by qualified personnel when: a The power-supply cord or the plug has been damaged; or b Objects have fallen, or liquid has been spilled into the appliance; or c The appliance has been exposed to rain; or d The appliance does not appear to operate normally, or exhibits a marked change in performance; or e The appliance has been dropped, or the enclosure damaged. 17 Servicing ­ The user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel. To prevent fire or shock hazard, do not expose this equipment to rain or moisture. [. . . ] If you have a choice between line level and speaker level connections, choose line level. Use the following table to select the correct wiring method for your installation: Because the subwoofer produces only lowfrequency sounds, positioning is less critical in some respects compared to full-range speakers. Directional information is much less precise and you have more choice where to place the speakers to good effect. This said, best results are obtained if the subwoofer is placed between the satellite speakers or in the vicinity of one of them. If you use two subwoofers, it is best to put one near each satellite speaker. Placing the subwoofer behind the listeners, even in surround sound installations, generally gives inferior imaging; but may be an acceptable compromise if domestic considerations dictate. As with all speakers, the proximity of room boundaries affects the sound. Bass is generally increased as more surfaces come into close proximity with the speakers. Unlike full-range speakers, however, you can always restore the correct overall system balance by adjusting the volume level of the subwoofer. The more boost you get from the room, the less hard the speaker has to work; but there is a down side. Corner positions often excite more low-frequency room resonances, making the bass more uneven with frequency. There is no substitute for experiment as all rooms behave differently, so try the subwoofer in a variety of positions before making a final decision. A piece of music with a bass line ascending or descending the musical scale is useful for assessing the smoothness of the bass response. Having a separate subwoofer does enable you to optimise for room resonances independently from siting the satellite speakers for best imaging. If the subwoofer is to be used in a confined space (eg in custom furniture), the space must be ventilated to allow sufficient air to circulate and cool the unit. The spikes pierce through carpet pile, giving a firm support directly to the floor surface without crushing the pile. When fitting spikes, first screw the lock nuts fully onto the spikes, then screw the spikes fully onto the threaded inserts in the base of the cabinet. If the unit rocks, loosen the relevant two opposing spikes until the support is firm, then re-tighten the lock nuts to the inserts. If the unit is to be placed on a vulnerable surface, either place a protective disc under each spike or fit the four rubber pads in place of the spikes. Decoder with separate power amplifiers: a With subwoofer output: Connections: fig. Decoder with integrated power amplifiers: a With subwoofer output: Connections: fig. Separate pre- & power amplifiers: a One or more subwoofers with output combined into a single mono signal: Connections: fig. [. . . ] When in use, objects left on top of the subwoofer are liable to rattle. In particular, avoid the risk of liquids being spilled (eg from drinks or vases of flowers). If the system is taken out of use for a long period, disconnect the subwoofer from the power supply. The optimum settings depend on the other equipment used with the subwoofer. [. . . ]