How LARGE do you like your music?
Unless a system can cleanly reproduce all the information (well engineered/recorded in an environment with good acoustics and mic placement) in a quality cut, to the original/intended dB level; It's listener will never hear that information.
ie, regarding, "depth": the reflection off the venue's back wall.
Of course: familiarity with the venue in which a recording was made, would go a long way with regards to recognizing whether what one's hearing is actually accurate. NOT that that's a necessity, when it comes to the enjoyment of one's music, BUT- having that knowledge, one can be confident that their other recordings are also being faithfully reproduced.
'Checkerboard Lounge Live Chicago 1981' (on vinyl) is a favorite of mine, far as being able to hear the room, especially between songs.
Especially, in the softer cuts of Diana Krall's 'Live in Paris' vinyl (45 RPM/180 Gram), I find the Olympia Theatre's back wall reflections nicely reproduced (with accurate depth).
Back the the size-of-your-music thing: I turn my sound up slowly (a song at a time, to acclimate the ears to higher dB levels, without having them shut down), until my image height reflects where I imagine/know the performers to have been, when recorded. Again: a system has to be able to reach that level cleanly/without distortion, or: it's just LOUD (iow: noise).
It's been my experience: seated in the better/more expensive, front and center seats; it's easy to hear and locate individual voices (human or instrumental), on a stage and seldom would the level be low enough for some to consider, "safe enough". Yet: no one complains, because it's clean sound (just big).
Most Blues are just meant to be played energetically.
Ever seen anyone cover their ears during the Finale of Stravinsky's 'Firebird'?
The long pipes/pedal notes of the Crystal Cathedral's Ruffatti organ could/would pull the air from your lungs. Playing Crystal Clear's DTD recording brings that home.
It's also during such reproduction, that the effects improved fuses, PC or speaker cables and interconnects bring to the listening room, are most evident.
The tests I mentioned in my first post eliminate all the variables and present the listener with established sounds, that will let them know if their system is actually reproducing what's in the recording.
If your system doesn't put out (or you can't hear) what's in those tests: it's NOT because the effects are a, "myth"!