User manual B&W ASW300

[. . . ] 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. [. . . ] As the subwoofer is connected to the electricity power supply, it is important that you familiarise yourself with the safety instructions and heed all warnings. B&W loudspeakers are distributed to over 60 countries worldwide and we maintain an international network of carefully chosen and dedicated distributors. If you have a problem, which your dealer cannot resolve, our distributors will be more than willing to assist you. 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, generally gives inferior imaging, but may be an acceptable compromise if domestic considerations dictate. 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 characteristics as the original part. 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. When so configured it incorporates all the filtering and level setting required for the subwoofer in all modes. For level calibration, the internal test noise and channel level controls in the THX® controller should be used. In all cases the levels should be set to obtain 75dB SPL (C-weighted) at the listening position from the controller's internal noise test signal. [. . . ] One that sounds impressive on one piece may sound overpowering on another. listen at realistic levels as the perception of balance varies with sound level. Finally, adjust the LOW-PASS FILTER frequency to give the smoothest transition between the subwoofer and satellite speakers. The bass you hear is a combination of the subwoofer plus the effects of the room and you should choose the position that best complements your room and the position of the subwoofer. [. . . ]