Writing something down does not make it true. Sound-stage is predominantly from large scale effects in the recording, the speakers (namely dispersion, smoothness of frequency response, and lack of significant phase irregularities), and how that interacts with the room. Don't need to trust me on that, we know that sound-stages comes from directional / distance cues, and they are dominated by the currently loudest signals.
Very subtle things, 100db down, heck even 60-70db down from the signal have little impact on any perception of sound-stage. Anything that "collapses" the sound-stage is a gross significant change, and that is never going to come from cable elevators. Far more likely is what prof alluded to.
Slew rate is defined by volume and bandwidth, as is complexity. No miracles there.
teo_audio1,292 posts12-18-2019 11:37am
You have to ask yourself, do you really think the sound stage, which is
almost all a factor of recording and speaker/room interaction, would
magically collapse due to some exceedingly low level interaction between
a cable and the floor?
All the subtle information we
look for with our ears, in a recording, is low in level..so yes..I would
expect that the subtle and easy to disturb high slew rate impossibly
intertwined micro signals involved in our limits of human resolution ..might benefit from some careful handling.