In this month's TAS (October 2020) Jonathan Valin reviewed the Børresen 05 loudspeaker. In the course of the long review he discussed sound staging.
"I’m not sure I have ever before heard clearer, tighter mono focus than that delivered by the Børresen 05s. I’m not talking about vertically “slit-like” imaging here, as if the vocalist has been turned into a narrow slice of peach pie. London’s voice, for example, is life-sized, rounded, and quasi-dimensional—not slightly one-dimensional as she would be through most cones-in-a-box or as fully 3-D as she is through the MBLs—but it is also unusually 'fixed,' solid and stable and centered right between the speakers....
"I used to wonder why Michael and Lars always widely spaced their speakers (nearly wall-to-wall) at shows, and then toed them in dramatically. (The folks at Audio Physic used to do this same thing.) But it is clear to me now that, because of their speakers’ more focused, phase-coherent release of energy and their low-reflection, low-diffusion enclosures, Borresen and Kristensen were using the space between the speakers to 'imply' greater stage width."
"I’m not sure I have ever before heard clearer, tighter mono focus than that delivered by the Børresen 05s. I’m not talking about vertically “slit-like” imaging here, as if the vocalist has been turned into a narrow slice of peach pie. London’s voice, for example, is life-sized, rounded, and quasi-dimensional—not slightly one-dimensional as she would be through most cones-in-a-box or as fully 3-D as she is through the MBLs—but it is also unusually 'fixed,' solid and stable and centered right between the speakers....
"I used to wonder why Michael and Lars always widely spaced their speakers (nearly wall-to-wall) at shows, and then toed them in dramatically. (The folks at Audio Physic used to do this same thing.) But it is clear to me now that, because of their speakers’ more focused, phase-coherent release of energy and their low-reflection, low-diffusion enclosures, Borresen and Kristensen were using the space between the speakers to 'imply' greater stage width."