Agreed with those said…disappearing act largely depends on original recording. While a well-set-up system and room are essential, the way a recording is engineered determines how effectively the soundstage is created and whether the speakers “disappear” into it.
IME, the disappearing act reflects the synergy between the recording’s spatial information and the playback system’s ability to reproduce it faithfully. Even the best system can’t make poorly engineered recordings disappear, but with a great recording, the illusion can be simply magical.
You’re right—while the “disappearing act” is essential for creating that sense of realism, it’s only one piece of the puzzle. A system can image beautifully and place instruments with pinpoint accuracy, but without proper tonal balance, harmonic richness, and dynamic effortlessness, it can still fail to convince the listener of its authenticity 😊