Here is a very detailed review by Robert Harley of the ultra high-end Magico M9 loudspeakers. However, how much of the sound which he is describing, is down to the loudspeakers themselves or the signal being sent to them ?
https://www.theabsolutesound.com/articles/magico-swings-for-the-fences-the-m9-loudspeaker
https://www.theabsolutesound.com/articles/magico-swings-for-the-fences-the-m9-loudspeaker