You can't have spatial distortion on speakers. Acoustic cross-feed always takes care of that. Spatial distortion manifests itself on headphones without cross-feed. Yes. It is very naivistic take on stereophonic sound trying to exaggerate the effect of two audio channels. On real ping pong stereo nothing occupies center. Half of the instruments are on the left and the other half on the right. On semi ping pong recordings some off the stuff is mixed center as mono. Yes, even mono sound can have depth if it contains proper spatial cues. Mono sound works well on headphones and gives steady centered sound image. I want to listen to people talking in Youtube for example (say on an unboxing video) mono as it should be. Often it isn't. You have weird phase shifts and what not. Very unstable sound. Well, I have mono switch on my headphone adapter. Youtube content creators are better with picture. Even the better ones make amateurish mistakes with the sound. So, sometimes it's beneficial to make the sound monophonic for headphones. Yes, and loudspeakers have been the way to listen to music outside live music. That has changed over the last decades and headphones have become very popular. What I have is much better than "just a boom box." I think demonstrations fail in having only one sound going around your head. You need a world of sounds to "anchor" things. Hearing compares colourizations to figure out spatial aspects. If you have only one sound, how can you compare it? Sounds coming behind you have more filtered treble, because pinna blocks high frequencies whereas for sounds coming in front of you pinna amplifies sounds. However, the filtering effects are very complex and really hard to get right. Everyone has own HRTF, so my opinion is to not try too hard on this. Make things sound pleasant and natural rather than ultrareal. It isn't a trick for me to watch miniature people on tv screen. These are the compromizes we have. I rather take it than not listening to headphones at all. I love headphone listening thanks to cross-feed. I have to admit I have never thought scale having relevance. On my tv screen Harrison Ford is only one feet high, but I can still enjoy his performance. When I go to movies, the actors are giants on silver screen. Again, scale doesn't bother me. Why would it matter on sound, when I can control loudness level? The band might be miniature, but they play loud! It enhances crappy ping pong recordings, but messes with the fidelity on well recorded music. I don't want the acoustics of my small living room to be convoluted to the acoustics of a church on a great recording of organ music. With headphones I avoid that and I can blast out the music without bothering other people with it, even in the middle of the night. It's not that simple. It depends on the recording. Rock music is produced very differently from classical music. Techno is so different from jazz. You have your preferences. I have mine. I also think multichannel is great (when done well). I think headphones are more capable than that.