Openness was the major quality I looked for in a system up all the way up til my 30s.
One wonderful discovery was finding out that tape decks usually had an adjustable screw which enabled you to fine tune the azimuth.
In my experience most needed adjusting, and I used to wonder how many people were listening to cassette decks which had less than optimal tracking.
Somehow, I gradually discovered that Naim amps 1980s/1990s) weren't renowned for tone and timbre and these qualities became more important than even openness and brightness.
I can't prove it but I tend to feel that the change from the old tube mixing desks to transistor may have been a gain for resolution but it was also a loss for timbre.
I'm guessing also that most of the Beatles albums were mixed on tube powered desks and most if not all of their solo work on transistor ones.
Swings and roundabouts, as usual.

