Pioneer Elite SC-89 Operating Instructions Manual page 151

Figure 4: Dolby Atmos enabled add-on modules include only upward-firing speakers. You can place them
on top of your traditional front-firing speakers or on another surface near them.
Comparison to overhead speakers
Dolby Atmos enabled speakers produce slightly more diffuse overhead audio that is
quite lifelike and, in some cases, may be preferable to the sound that originates from
overhead speakers.
If your ceiling is low or you have to mount your loudspeakers on overhead trusses or
brackets, overhead speakers may be too close to you as you listen. The audio may
be distracting because you'll hear, directionally, what each speaker is producing
instead of feeling immersed in an atmosphere in which sounds occur naturally
overhead.
In this environment, Dolby Atmos enabled speakers may be a better solution for
reproducing the height plane of sound you would hear in a cinema, where the
overhead speakers are located high in the auditorium, and are naturally creating a
more diffuse experience. Audio mixers and experts who have auditioned Dolby
Atmos enabled speakers agree that the sound these speakers produce can be
preferable to the sound of dedicated overhead speakers.
Dolby Atmos enabled speaker positioning
Dolby recommends installation of four Dolby Atmos enabled speakers whenever
possible. Use of four speakers will make the placement of overhead sounds more
accurate, and you'll get more precise, realistic sounds when an object, such as a
helicopter, passes overhead. Two of the speakers (whether they are integrated
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