PLACEMENT OR POSITIONING
Your new subwoofer will work well in a variety of locations. However, placement in your listening room will affect its performance. Since the wavelengths of sound reproduced by your subwoofer are large compared to its size, those sounds are
Because the sounds you hear are a combination of direct sound from the speaker and reflected sound from the walls, ceiling, and floor of your listening room, placement of the subwoofer in relation to room boundaries changes the balance of what you hear at low frequencies. In that low frequency range, the dimensions of most rooms are comparable to the wavelengths of those sounds. As sound propagates and reflects in the room, “standing waves” are created at frequencies where the wavelength of sound or multiples of the wavelength are equal to one of the dimensions of the room. At your listening position, these standing wave patterns of reflected sound add together in and out of phase causing large variations in the response that you hear.
As a general rule, locating your subwoofer near the corner of the room will increase its overall output, but will excite more standing waves in the room and may result in a more uneven response. Locating your subwoofer along a wall will usually mean less acoustic output but a somewhat smoother response. A middle of the room location would suggest the smoothest response with the least output capability. Of course, any location will be a compromise between acoustic performance and the aesthetic blend of the subwoofer enclosure with the decor and furnishings of your room. Don’t be afraid to experiment with the location of your subwoofer in your room for the best results at your listening position. As with any other listening test, use program material that you are familiar with that has substantial bass content.
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WIRING AND CONNECTIONS
Turn off all power to your subwoofer and other equipment before making any connections.
Installation using speaker level inputs
A) For amplifiers with one set of speaker connections.
If a preamplifier output connection is not available on your amplifier or receiver, your subwoofer can be connected using your equipment’s speaker outputs. These connections are made using commonly available 18 or 16 gauge lamp cord or speaker
Right Left
Speaker Speaker
- + |
| + - |
|
|
|
- R + + L -
Receiver
or
Power Amplifier
FIGURE B
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