Niles OS7.5 Installation & Operation Manual page 11

If possible, mount the loudspeakers between eight and twelve feet high. The less
the downward angle of the loudspeaker, the further the sound will carry. If the
sound is carrying into areas where you do not want sound, try pointing the
loudspeakers more downward, this will reduce the amount of sound further away
from the loudspeaker.
You can control the loudspeaker's bass output by placement. This is called the
boundary effect. You will get more bass response by mounting the loudspeaker
directly to a wall or other flat surface (any boundary close to the loudspeaker will
reinforce the bass frequencies). You can increase the bass output even more by
mounting the loudspeaker in a corner or under an eave (See Figure 5) This type of
placement gives the loudspeaker two boundaries, thus reinforcing the bass sounds
even more. Of course, if you wish to hear less bass, try moving the loudspeaker
away from the boundary (See Figure 6).
Placement for more bass output
Mounting Methods
The OS loudspeakers can be mounted either horizontally or vertically. The bracket
knobs will keep the loudspeaker angled correctly in any position once they are
tightened. You can choose from three mounting methods to attach the loudspeaker
to the wall, ceiling, or other mounting surface.
1. If the loudspeaker is never going to be exposed to sudden accidental impacts,
wind, waves or earthquakes you can simply hang it on a nail using the nail
hole(s) on the bracket (See Figure 7).
Figure 5 Figure 6
Placement for
less bass output
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