@prof Right on!! Too many people these days are being lured, one way or another, to opting for speakers that may be super accurate (debatable) but which aren't pleasant to listen to.
Timbral accuracy is all about getting that unique mix of overtones right, and so ensuring that a viola doesn't sound like a violin.
Tone may be a synonym, or it may be more a question of the overall tonal balance/voicing of the speaker, tilted this way or that.