Not meaning to sound coy, or arrogant, and understanding that you're not wanting to get into the whole component thing, but you have to understand, as I'm sure you do, that you are essentially listening to attenuated juice courtesy of your local utility. As such, there is a path followed from wall to speakers, with each component along that path having profound affect on the voice of those violins. I believe it would be most helpful to people looking to provide additional valuable suggestions (as I have been lucky enough to receive here on more than one occasion) if you provided some more info about your system. The issue may lie anywhere along the path, including your listening space.
Happy Listening!
Happy Listening!