Strumelia:
I think part of the problem is that with mtn dulcimers, there is a HUGE variety in the factors that influence sound: body shape, body volume, wood type, string gauges and types, inner bracing, wood thickness, instrument age, repairs, overall scale length or size, pick variations, noter or finger fretting, action,...the list can go on and on, and every one of these factors can influence the sound/tone/volume to one degree or another. Side by side tests are rather meaningless unless every single factor but one is absolutely identical. In comparison- violins, mandolins, guitars etc do have some of the same kinds of variations but overall they tend to be much more uniform and therefore it's a bit easier to make comparisons based on one factor, such as wood type or body volume for example. Yet we expect to be able to make the same comparisons on wildly varying dulcimers?...we cannot. There are just way too many variations to do accurate scientific comparisons on dulcimers that are different from each other in multiple ways. In the end, our best means of selecting a dulcimer for ourselves remains: simply listening to an existing particular dulcimer to see if we LIKE the sound (what a concept), or by talking to your luthier of choice about your goals and preferences so he can try to incorporate some of the factors that would increase the odds of a custom dulcimer sounding to your liking. All that said, it seems like we have this very same discussion every year.
Ditto!