Guidelines For Deciding On Subwoofer Placement; Subwoofer Placement - Martin Logan INSTALLER Sreie Manuel De L'utilisateur

Guidelines for Deciding on Subwoofer Placement

When considering subwoofer placement directly into a wall, keep the following in mind:
• DO NOT install subwoofers into lath or plaster—over time, the bass vibrations will
cause material to crack;
• DO NOT install subwoofers into cavities that contain ductwork;
• DO NOT locate subwoofers close to wall-mounted fixtures that may vibrate (remember
to check the other side of the wall too!);
• DO NOT install subwoofers in a cavity that already contains an in-wall speaker;
• If installing in a wall with metal studs, make sure studs are securely fastened so that
they do not vibrate or rattle;
• Some acoustic bleed-through into the adjacent room is unavoidable. See section
on "Subwoofer Installation" for suggestions to reduce bleed-through.

Subwoofer Placement

Although not required, you will achieve best results using MartinLogan in-wall subwoofers
in pairs. Using a pair of subwoofers will allow you to randomize the standing waves
within your listening room so that bass is distributed in a more uniform manner. Two
subwoofers also ensures even lower distortion, especially at high output levels.
Bass is less and less directional as it goes down in frequency. For best sonic integration,
placing one subwoofer in the wall at the front of the room and the other in the wall at
the rear usually provides the best performance and sonic integration. If this location
is not possible, keeping in mind the guidelines provided earlier, you may place your
subwoofers anywhere in the wall without affecting the stereo image of your front speakers
or the soundstage of your multichannel speaker system.
Figure 1a & 1b: highlight how bass output is generally affected by placement. When
seated in the typical listening area of your room, placing the subwoofers in the various
positions will typically result in bass performance as follows:
Fig. 1a: Corner placement close to the floor provides the best balance of output and
accuracy.
Fig. 1b: Along a Wall: Placement anywhere along the walls close to the floor, but
outside the "shaded" area will provide slightly reduced output, though still acceptable
accuracy.
If desired, for further optimized bass performance and even greater output, you can install
an additional pair of MartinLogan in-wall subwoofers. Figure 2 provides recommended
placement for four subwoofers.
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