Allen wrote: " There's more to timbre then you can capture in a spectrum plot."
Amen to that.
It's a voice that I don't always trust because it is seductive as hell and just short burying string definition and projection: in my experience it's associated with bigger and deeper instruments with strongly resonant back and side woods and more often than not, cedar tops; I'm talking about that piano-like vibrato that seems to bloom out of the body.
I think most would know what I mean, but I wonder: in addition to the thickness and coupling of the plates, could a deeper body contribute to this ?
Again, I think depth may correlate, but others may disagree and even then correlation isn't proof. I just wondered what others thought.