I knew my acoustical optimization of my AKG K340 hibryd was done well when i cranked up the highs with tone controls and equalization because the violin sound was enebriating like an angelic silk thread...
If a system dont gave enough bass or beautiful highs and medium as natureal as possible the timbre of instrument, non amplified as amplified is distorted...
it is because of this acoustical stress that often people pick their gear piece upgrade to compensate, or some albums in spite of others less easy and natural to listen to...
The gear pieces design quality and synergy cannot be replaced but only compensated by acoustics controls, mechanical one mainly in my case and also equalization and tone control.
But on the other hand no piece of gear can replace acoustic control impact to gain natural timbre and sound spatial characteristics...
On the other hand, I can think of at least one pretty persistent irritant for what I believe to be timbre issue, and that is massed violins, I’ve yet to experience a fully natural presentation/timbre via digital, vinyl reproduction sounds more like the real thing although digital has continually evolved here.