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By removing the plate in which the PMD is mounted, you expose a new surface
to which the PMD may be mounted at a 22.5° angle. This angled surface may
also be rotated in 90° increments.
For example, think of a situation in which the Point 2 is being used unusually
high on the wall. You can mount the Point 2 with the woofer nearest the ceiling,
and the PMD angled down into the listening area.
Alternatively, in a 3D audio application such as Dolby Atmos, some of the ceil-
ing speakers may be located well in front of the main listening area. The flexible,
controlled directivity of the PMD once again allows the sound to be focused
where it is needed.
The Importance of a Baffle Wall
Whether used as an in-wall or as an on-wall speaker, the Point 2 is optimized
for use on a solidly-constructed surface. It should not be mounted in open fram-
ing, as this results in improper low frequency loading and many early reflection
and diffraction effects that adversely affect performance.
When used in an in-wall configuration, the framing must be 2”x 6” or deeper,
as the Point 2 is designed to take full advantage of the 5.5” depth found in such
framing. Ideally, each loudspeaker is “framed in” much as a window would be
framed in. This approach provides the most solid support of the loudspeaker,
and surrounding the face of the speaker with either the dry-wall or plywood
wall surface provides both bass reinforcement and the fewest reflection and dif-
fraction problems.
Wall Construction suggestions
Having a solidly-built wall is essential for getting the best performance out of
any wall-mounted speaker. After all, the wall may not move as much as the
speaker diaphragms, but it has vastly more surface area. If it resonates even a
bit, it can and will color the sound greatly.
Hence, some suggestions:
1.
Using the supplied “ears,” screw the speakers to the surrounding fram-
ing rather than to the wall surface (sheet rock, plywood, whatever).
The simplest way to do this is to frame in around the speaker locations so
there is only an inch or two of space between the speakers and the sur-
rounding studs. If you are building the walls anyway, the incremental cost
of a few extra studs is small. But it will pay off in quieter walls.
