User manual B&W ASW 2000

[. . . ] 8 Ventilation ­ The appliance should be situated so that its location or position does not interfere with its proper ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or placed in a built-in installation, such as a bookcase or cabinet, that may impede the flow of air through the ventilation openings. 9 Heat ­ The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances that produce heat. 10 Power Sources ­ The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance. [. . . ] Left and right channel inputs may be combined into a single mono low bass feed to the subwoofer drive unit if required. The subwoofer will input and output both line level signals via the RCA Phono sockets and speaker level signals via the 4mm binding posts located on the back panel, giving a flexible choice of connection methods. However, you must not use a mixture of line level and speaker level connections in the same installation. 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. [. . . ] Similarly, when switching off, switch the subwoofer off last. On first switching the subwoofer on, the amplifier goes into standby mode and the light above the on/auto/off switch glows red. When an input signal is detected, the amplifier automatically becomes fully active and the light glows green. After a period of about 5 minutes without an input signal, the amplifier automatically reverts to standby mode. [. . . ]