Some would have you believe that in-wall/in-ceiling speakers require
drivers that pivot. This is not standard practice in high-performance bookshelf
or floorstanding speaker design, and for the same reasons it is
counterproductive for in-wall/in-ceiling speakers.
Typical in-wall/in-ceiling speakers use inexpensive low-performance drivers.
They may even be dressed up with impressive looking cones or domes to make
you think they are engineered designs, but nothing could be further from truth.
These speakers not only have poor sound, they also have poor dispersion
resulting in sonic hot spots — too much sound in one part of the room and not
enough in another.
Pivoting the woofer and tweeter is no better. Pivoting the woofer and tweeter
in different directions will result in listeners hearing drastically different
frequency responses—it’s impossible to have accurate sound with these drivers
aimed in different directions. Pivoting the woofer and tweeter in the same
direction doesn’t solve the problem either. Since these systems beam sound to
sonic hot spots (like a spotlight), pivoting the woofer and tweeter in tandem
will simply move the sonic hot spot to another area of the room.
Pivoting tweeters don’t
address the problem (they generally have wider dispersion already). The problem
of poor dispersion is in the midrange-tweeter interface. To accommodate the
pivoting mechanism a small low-power plastic encapsulated tweeter is required,
which necessitates a higher crossover to prevent thermal failure. Upper midrange
must then be reproduced by the woofer, which becomes directional (beams) in that
region. Pivoting the tweeter will aim high-frequency sound toward listeners, but
the all-important midrange will not reach them. The result is a progressively “
sucked-out” midrange and bright, screechy high frequencies.
Paradigm® in-wall/in-ceiling speakers
use superior high-performance, high-power drivers. Where applicable we even use heatsinks on
our high-frequency drivers for higher power handling. This allows us to use lower crossover
points and ensure wide dispersion (see pages 8 – 9). Sonic hotspots are eliminated—
every listener hears superb imaging at volume levels that are equal throughout the room.
Because we have addressed the root of the problem—wide dispersion through the upper
midrange—pivoting drivers are simply not required.