The OP list is right...
But subjective....
I experiments with acoustics objective concepts and parameters to reach this felt experience ...
My modified low cost system can do that to me ...( especially the headphone because of the acoustics limitation of my modified but small speakers in my second room after selling my house)
But i must add something or correct the OP description or perhaps precise it here :
The listener doesn’t know where any of the music came from, but, it is all inside of him.
The music in my past first acoustic room , which was better than my actual one because of bigger speakers and more complex acoustic devices used , or the music in my headphone dont come from inside me but reflect the acoustics recording trade-off parameters chosen by the sound engineer which vary greatly album to album ...
Listening Bach Marie Claire Alain in my system i hear the church acoustic . In no way i had the sensation of music inside me , i felt on the opposite to be transported in a church and i forget completely my small room and i feel the obligation to keep my eyes open to see the playing organ through my disapearing walls room ... I am in a church...
The goal of a good system is the translation of acoustic parameters chosen by a recording engineer into the acoustic parameters implied by the optimized relation between your ears/system/room ... This TRANSLATION is never an exact and merely reproduction and cannot be for evident acoustics reason ... This acoustical translation is where audiophile experience fail or stall or succeed...
( Edgar Choueiri explained very well why and how crosstalk among other factors for example impede acoustic translation from the set of any recorded acoustic information to the Ears/stereo system/room recovering translation in a new acoustic environment . )
