Psycho-acoustic is not subjectivist nor objectivist....
The better sounding system is always the best acoustically embedded one...
All the rest is upgrading marketing conditionment in all audio thread...
Timbre tonal playing microstructure EXPERIENCE is related to a specfic ears in a specific room...
Controlling the acoustical factors in relation to specific gear Is way more important than just using a tool to measure an amplifier quality or cherry pick amplifier by ears...The last two is not the end of the process, it is not even the beginning of the process...
Music listening is an esthetical and spiritual acoustically CONTROLLED experience in a room ...Like a musician controlling his playing body....
In the 2 cases timbre optimal perception is the key....
The worst system is the one created by objectivist, then less worst by subjectivist, the better one is created by an acoustician...