Violins can sound "silky" and smooth, or edgy and sharp, or plucked...it's all in the intent of the player.
None of that sounds bad, when played back on a good system.
Unintended artifacts are caused by many other things...bad recordings, poor acoustics, playback source component, and speakers systems are at the top of the list, as....the most likely cause.
Violins are "not" hard for an amplifier to reproduce...it doesn't take a mega priced amp....even an Onkyo can do it, and with out the unintended artifacts of shrillness.
The biggest difference, between an outstanding amplifier, and a good amplifier is "tone". The best amplifiers get it nearly perfect, and that makes them a pleasure to use, because they are so much more musical sounding...the rest just do the best they can.
Dave