User manual B&W ASW650

[. . . ] However, if something does go wrong with this product, B&W Loudspeakers and its national distributors warrant free of charge labour (exclusion may apply) and replacement parts in any country served by an official B&W distributor. This limited warranty is valid for a period of five years from the date of purchase or two years for electronics including amplified loudspeakers. You can call B&W in the UK or visit our web site to get the contact details of your local distributor. To validate your warranty, you will need to produce this warranty booklet completed and stamped by your dealer on the date of purchase. [. . . ] What the subwoofer does application: Home Theatre The primary function of the subwoofer is to reproduce signals from the Low Frequency Effects (LFE) channel. In addition, the processor may be configured to divert the low bass portion of some or all of the other channels and add it to the LFE information by configuring those speakers to 'small' in the processor set-up procedure. Application: 2-channel audio The subwoofer is used to extend the bass response beyond that provided by the satellite speakers. In most cases, best results are obtained if the satellite speakers are run full range as normal directly from the power amplifier. The subwoofer lowpass filter is then set so that its output rises as that of the satellite speakers falls naturally. However, if the satellite speakers are very small, the system output level may be limited by overloading their bass drivers. If this is the case, better results may be obtained by using the high-pass filters in the subwoofer to limit the bass energy fed to the satellite speakers. 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 left and right speakers or in the vicinity of one of them. If you use two subwoofers, it is best to put one near the left and one near the right speaker. Placing the subwoofer behind the listeners, even in surround sound installations, 21 Replacement Parts ­ When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer or have the same 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. The MODE On/Auto switch (8) and indicator light (9) operate as follows: On: With the switch in this position, the amplifier remains permanently fully active, and the light glows green. Auto: On first switching on the subwoofer while set to Auto, the amplifier becomes fully active and the light (9) glows green. After a period of about 5 minutes without an input signal, the amplifier automatically reverts to standby mode, and the light glows red. When an input signal is detected, the amplifier automatically becomes fully active and the light glows green. Using more than one unit in a single installation can improve performance in the following ways: · Cope with larger listening rooms. Enable greater maximum sound output ­ often useful for effectively reproducing special effects in Home Theatre applications. If you are using two subwoofers for 2channel audio, stereo separation is improved if each channel has its own subwoofer, providing each one is placed close to the relevant satellite speaker. Only use the mono connection of figure 8 if you cannot place each subwoofer close to its satellite speaker. [. . . ] However, if the manufacturer of the satellite speakers does not quote a -6dB frequency, but only a 3dB frequency, the optimum setting for the LOW-PASS FILTER frequency control will be between 0. The more gradual the roll-off rate of the satellite speakers, the lower the frequency should be set. If you are running the satellite speakers high-passed (figs 8, 9, 12, 13). Home theatre With home theatre the subwoofer (LFE) signal is a separate channel rather than an extension of the signal to the satellite speakers. [. . . ]