A sounfield must be coherent...
And the cables and amplifier and speaker help for the holography indeed , but a coherent holography is an ACOUSTIC phenomenon FIRST AND LAST coming if the speakers/room is optimized... ....Not a disturbing artefact...
But we can create artificial holography for sure, a compaqny i will not name sell devices that do that artificial "holographical sound effect" i am not interested by that kind of "tweaks"...I am in mechanical room acoustic or electronic BACCH filters which are natural recreation of the recording soundstage in a "virtual room holography " with no degradation of timbre instruments...
if someone do not want to tune his room to create a natural holography, the Cgoeri BACCH filters do that and IT IS NOT ARTIFICIAL TRICK...Read about it...