See the complete review of the PSB Imagine XA Dolby Atmos Enabled Speakers
This illusion is considered a “phantom” sound, emulating the direct sound heard from a ceiling speaker. There is still much discussion about which is preferable but PSB makes a strong case for the “enabled” speaker in the Imagine XA module which can be wall mounted or placed on the main speaker.
The Imagine XA is like most Atmos® Enabled speakers with the familiar sloped top angled about 30 degrees, it provides a ceiling-reflected path from in front or behind the listening position. Working closely with the Dolby specification on enabled speaker, PSB designed the XA to perform within a certain frequency, distance and mounting height.
See the complete review of the PSB Imagine XA Dolby Atmos Enabled Speakers