The multiple reference points are directly tied to the gear! The "acoustic parameters" change each time for everyone, except for the 1 trick pony.
First you cannot know the optimal working level of a system BEFORE experimenting with it, you must chose one to begin with and using all parameters to install optimally it in the house/room.. This is the learning path .
We learn by using one system and experiment with it in the mechanical, electrical and acoustical working dimension and their possible acoustics parameters.
( acoustics with an "s" is more than just room acoustic i modified my speakers porthole and waveguide with acoustic basic knowledge and i used crosstalk physical and psychoacoustical fact to improve my listening experience the same is true for timbre, ASW and LV as evaluated not only in the room acoustic but in regard to mechanical and electrical and modified gear factors because all factors are interrelated etc )
Then changing the gear pieces BEFORE learning basic knowledge with a system which is already minimally good and synergetical to begin with and chosen as a starting point is an ERROR ...
When we had learned how to install one we can install any other system...it is time to invest more money...
Then what i just explain here invalidate your point about me...
Anybody knows that all pieces of gear speakers included act with different design idea and different specs ... So what ?
How this cliche can invalidate my argument that we must learn acoustics with an "s" with one chosen preferably relatively low cost system BEFORE upgrading to very high end ?😊