You obviously need good quality equipment… speakers and electronics. Then you need ample room behind the speakers, appropriate rear wall (behind speakers) dampening… which is speaker dependent, and careful appropriate toe in.
My speakers are known for their ability to disappear. After having them for a while I noticed the didn’t and the soundstage was constricted. So I did some adjustments to the toe in… voilà soundstage widened and deepened and the speakers disappeared.
Great imaging that comes to mind… Wilson Audio, Audio Research, Audio Physics, Rowland, Merlin, I am sure there are a lot more…. Ribbon and planar speakers… but above all WORK. Positioning and room treatments.