is it possible that musicians might disagree ?
if so, the answer to thread is: it is a matter of opinion and preference ?
if you can't compare the recording with the sound of the instrument recorded, you don't have a scientifc assessment of the accuracy/inaccuracy of timbre of a stereo system. you have an anecdotal account, based upon memory. even if you are a musician, your recollection is not perfect.
there is no reference, other than memory to compare to the sound of a stereo system, unless the musician is playing in the room and a recording is made of the performance.
if memory is the basis of judgment the result is conjectural, not factual.