User manual B&W ASW 500

[. . . ] 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. To avoid electrical shock, do not open the enclosure or remove the amplifier from the rear panel. [. . . ] the ASWTM500 has been designed for Home Theatre installations and to augment the bass performance of `full range' speakers in stereo audio use. Adding the subwoofer to your system not only extends the bass to lower frequencies, it improves the midrange clarity by reducing the low-frequency demands on your existing speakers. The subwoofer is magnetically shielded for use close to a television screen. All sound installations require some planning and experimentation if you are to get the best out of the products used and this manual will guide you in this process. 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 50 countries world-wide 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. Because the ASWTM500 produces only very low notes, positioning is easier than for full-range speakers. Best results are obtained if the ASWTM500 is placed between the front speakers. If you use two ASWTM500s then it is best to put one near each front speaker. The ASWTM500 is supplied with conical feet that raise the base of the cabinet clear of the floor to allow the down facing port to operate correctly. In custom furniture), the space must be ventilated to allow sufficient air to circulate and cool the unit. Depending on the volume of the enclosed space, it may be necessary to provide ventilation into the room. With this method of connection, the ASWTM500 drive unit is still powered by its own internal amplifier and the signal fed to the satellite speakers has the deep bass removed. If your decoder has a separate subwoofer output, connect it to one channel only (left or right) LINE IN socket (for line level) or FROM AMPLIFIER terminals (for speaker level) of the ASWTM500 and feed the left and right front speakers directly from the decoder in the normal way (not via the ASWTM500), using a separate power amplifier if necessary (figure 3). If your decoder has no dedicated subwoofer output, connect the ASWTM500 to the left and right front outputs of the decoder and your left and right front speakers via the ASWTM500, using either the LINE IN/LINE OUT sockets with separate power amplifiers (figure 4) or the FROM AMPLIFIER/OUTPUT TO SPEAKERS terminals (figure 5) in the same manner as described above for stereo amplifiers. Disconnect all sound system equipment from the power supply until the signal connections have been made and checked. the ASWTM500 accepts inputs and outputs at either line level (RCA Phono sockets) or at speaker level. However, you must not use a mixture of line level and speaker level connections in the same installation. Any number of ASWTM500 units can be daisy chained together in either two-channel mono or single-channel mode. Using two or more units in a single installation can improve performance in the following ways: Enable greater maximum sound output ­ often useful for effectively reproducing special effects in Home Theatre applications. (figure 1) This is the preferred method, and is suitable for use when you have a separate pre-amplifier and power amplifier or an external link between the pre- and power amplifier sections in an integrated amplifier. [. . . ] If at any time you make changes to the amplification of the system such that you change from speaker to line level connections, it is worth checking the phase setting again. set the loudness of the ASWTM500 relative to the satellite systems to your liking. One that sounds impressive on one piece may sound overpowering on another. If you get problems with uneven bass it is worth experimenting with the placement of the ASWTM500. [. . . ]