Pioneer Elite SC-89 Operating Instructions Manual page 152

speakers or add-on modules) should be in the front left and front right speaker
locations of your system. The other two should be positioned in the surround sound
speaker locations, ideally at the rear surround speakers, if you have them.
If using only two Dolby Atmos enabled speakers, place the Dolby Atmos enabled
speakers at the front left and front right speaker locations. Note: With the exception
of the center and center surround speakers, all speakers in a Dolby Atmos playback
system (listener level, overhead, Dolby Atmos enabled) must be added in pairs.
Dolby Atmos speakers should be located in the front left and right and left rear
surround and right rear surround locations in a 7.1.4 playback system.
Placement height
For optimal effect and to minimize direct radiating audio at listener level, place Dolby
Atmos enabled speakers at or slightly above the height of your ears when seated.
Avoid placing the Dolby Atmos enabled speakers higher than one-half the height of
your wall.
Placement relative to listeners
To avoid an unwanted proximity effect, make sure the speakers are at least 3 feet
(0.9 meter) away from listening positions, ideally 5 feet (1.5 meters) or more. This
distance may potentially be less if the upward-firing driver(s) of the Dolby Atmos
enabled speaker is placed well above the level of the closest listener's head.
Positioning of add-on modules
If you're using add-on modules, place them either on top of your front and surround
(ideally, rear surround) speakers or within 3 feet (0.9 meter) of those speakers.
Dolby Atmos enabled speakers should be mounted horizontally so that the driver is
facing toward the ceiling.
Room treatment considerations for use of Dolby Atmos enabled speakers
For optimal performance, the ceiling should be flat (not angled or vaulted), with a
height of 14 feet (4.27 meters) or less, and made of an acoustically reflective
material (drywall, plaster, hardwood, or another rigid, non–sound-absorbing
material). The ideal ceiling height is between 8 and 12 feet (2.44 and 3.66 meters).
Sound-absorbing and sound-diffusing treatment for handling unwanted reflections
from the walls and floor is recommended to improve sound quality and system
performance. When using Dolby Atmos enabled speakers, first audio reflection from
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