"The music is rendered holographically in three dimensions so that when you are seated in a different position in the hall the sound just takes on a slightly different aspect but does not cease to be holographically three dimensional."
That is the thing often attributed uniquely to omnis.
As I mentioned, my Dynaudio monitor setup that runs off this same gear as my more omni OHMs exhibit this quality as well, as do many well set up rigs I have heard at dealers and even shows over the years.
The key difference I notice between the omni OHMs in particular and the Dynaudios in this regard is that with the OHMS, if I move say to the left the holographic image shifts to the right, much like in real life. WIth the Dyns, if I shift left, the image does as well. ALso the OHMs will continue to exhibit this behavior from most any location in front of the speakers, even if well to the outside of either. With the more directional Dynaudio monitors, the soundstage will tend to diffuse sooner if listened to from more highly deviant locations.
That is the thing often attributed uniquely to omnis.
As I mentioned, my Dynaudio monitor setup that runs off this same gear as my more omni OHMs exhibit this quality as well, as do many well set up rigs I have heard at dealers and even shows over the years.
The key difference I notice between the omni OHMs in particular and the Dynaudios in this regard is that with the OHMS, if I move say to the left the holographic image shifts to the right, much like in real life. WIth the Dyns, if I shift left, the image does as well. ALso the OHMs will continue to exhibit this behavior from most any location in front of the speakers, even if well to the outside of either. With the more directional Dynaudio monitors, the soundstage will tend to diffuse sooner if listened to from more highly deviant locations.