Interesting observation. I have a similar experience before going to Munich High End. Please see the link to my article above.I was last Sunday at as string quartet concert in the Tonhalle Zurich in their “small” hall. The sound was so rich and full! We weren’t that close but I measured peak levels (C weighted fast) of over 90dB, which is quite loud when you consider the distance and it being only 4 unamplified string instruments.
What really struck me , beside the SPL, was the richness of tone and the ability to easily localize the instruments in space. It just reminded me how epically most systems fail in tone reproduction. Nearly all are too thin and lack body…as well as dynamics.
If the manufacturers at Munich were serious about doing this right they would listen and learn but it might destroy a few dogmas…
I went to a Vienna Phil concert in Paris. The hall on Champs-Elysées was wonderful. The average SPL during the concert (according to my Apple Watch) was 89dB. I was sitting on row 4, and the hall was small by modern standards. Going to these concerts makes me think how much further we have to go to improve our systems !