User manual CAMBRIDGE SOUNDWORKS POWERED SUBWOOFER II

[. . . ] 9 Important ­ Please Read First B ass drums, organs, and electronic synthesizers are among the very few instruments that produce extremely low-frequency sounds. As a result, comparatively few home loudspeakers are designed to reproduce bass below about 50 Hz. Today, however, home loudspeakers are called upon to reproduce more than music: in home theater systems, they are called upon to reproduce movie soundtracks. And modern movie soundtracks contain a lot of energy at very low frequencies--on sound effects. [. . . ] This condition, known as acoustic feedback, will muddy the sound, or worse, set up a loud, low-frequency rumbling. A listening room's construction also has a marked affect upon the very low frequencies reproduced by the Powered Subwoofer II. Thin, relatively flexible walls allow bass to dissipate readily, as do open doors, archways opening into another room, and even open windows. In addition, the larger the room, the greater the demand for low-frequency acoustic energy. Therefore, for best low-bass, the ideal room for a home theater would be moderate in size, solidly constructed, with no openings to other rooms. Obviously, not all rooms meet all these criteria. However, if you have the option, set up your home theater in the room that comes closest. When listening, shut the room's doors and windows if practical, which can make a surprising difference. If your listening room is very large and/or opens out into another room, the higher acoustic output of our original larger Powered Subwoofer may be necessary (consult your store or a Cambridge SoundWorks Audio Expert). An option is available from Cambridge SoundWorks to optimize your system. Low-cut filters keep the low frequencies best left to the subwoofer out of the main front speakers. This "eases" the burden on front speakers and amplifier, letting them play more cleanly at higher levels. Our inexpensive Low-Cut Filters are ideal for use with Cambridge SoundWorks Model SeventeenTM, Model SixTM or Ambiance® speakers, or other conventional systems of reasonably wide range. You connect these filters between your main speakers and your amplifier. The filters begin to block bass signals to your main speakers below about 140 Hz, so that below 100 Hz, almost no bass signals reach your main speakers. A filter for your center channel speaker is not necessary with Dolby® Pro Logic® if you set its Center Mode control to Normal (which rolls off frequencies below 100 Hz). · The filters can go at either end of the left and right speaker wires. You can, for example, connect the filters' INPUT FROM AMP leads to the speaker terminals on your receiver or amplifier, then connect the speaker wires to the filters' OUTPUT TO SPEAKER leads (using the wire nuts supplied). Or, you can attach the filters at the back of your speakers. Connect the OUTPUT TO SPEAKER leads to the speaker terminals. Connect the speaker wires coming from your amplier to the INPUT FROM AMP leads with the wire nuts. · As with all speaker connections, be sure to maintain consistency with respect to the + and -- terminals on the receiver and those on the speakers. [. . . ] This warranty does not extend to any defect, malfunction or failure caused by misuse, abuse, accident, faulty hookup, defective associated equipment or use of the speaker with equipment for which it is not intended. This warranty is valid only when the speaker is returned to an Authorized Cambridge SoundWorks Service Station or directly to Cambridge SoundWorks at the address below, freight prepaid, together with a copy of the original sales slip to establish warranty status. If you have any questions regarding the location of an Authorized Service Facility in your area, please contact Cambridge SoundWorks. This warranty is in lieu of all other warranties, expressed or implied, of merchantability, fitness for purpose or otherwise. [. . . ]