Dear Peter,
Our gears are very much different but there are some addictive aspects of sound that I am pretty sure we have in common and those are what Al described about noise floor or quietness and the immediacy of energy rising from quiet passages. These aspects can be illustrated from a system using music like Scheherazade with wood wind instruments, piccolo, obe, clarinet, etc. Many music conducted by Stokowski has his signature in the way he used these instruments too. Imo Stokowski likes to use the quiet gap between instrument inter play and transition to draw you into the music creating more enjoyable listening sensation.
We may think the system has so low noise floor as Al said. But I think it isn't really that. My system is not that quiet. Yours is definitely more quiet. I could hear small tube artifacts and often rfi from my right tweeter when I am two feet away from it. The vdh also exhibits the surface noise of vinyl more than other carts. My room surrounding also is a working environment with noises. Yet I still have this sensation of quietness and immediacy of sound. So here is my own conclusion. The nuance is what makes this two effects.
1) Nuance is taken away by absorption panel.
2) Many power cords take away nuance.
3) Many vibration management platform, footer, grounding boxes take away nuance.
(Sound comes from vibration. Audiophile like to kill vibration. Maybe we overkilled? Just a thought to provoke people to jump on me now.
)
When nuance is there it lets you hear and feel the quietness of the time they were recording at the venue. We need all the nuance to hear the quietness the ambient of the recording venue. Natural reverb is only part of the ambient and easy to hear but there is something else too (not the coughing) that make up the sense of silence. Nuance also make super contrast of sound of each instrument. So between inter-play you can hear more swing, and out of quietness when a crescendo arise you hear more immediacy.
Peter, you got rid of 1-3. So to get these two aspect of sounds, given anyone has decent pieces of equipments, we do not even have to pay for it.