Islander wrote:
Its as if this instrument needs to command a certain bandwidth in the EQ spectrum to be most effective.What it does outside those parameters may clash with the other players and mush the sound. I wonder if that could be somehow quantified and built for.
Sure Islander, that is the idea. This is why opera singers create the
formant through a combination of natural born ability and learning to form their larynx/tongue/oropharynx in a way that makes them project. Not because it sounds good! In fact country western singers always sound better than opera singers until the orchestra pipes up.

In this case the range is 1500-2000 Hz, but in the Irish ensemble it might be different. Todd has got a big task figuring that one out. And then creating the instrument that will emphasize that frequency range. I would guess that the 1500 -2000 range would be a good guess. I would steer my attention towards bracing, both front and back, plus the bridge tuning might be another thing to focus on. And de-emphasize a lot of the usual things that make a guitar sound good like a loud AO. But I could be wrong, never built one.