What do we call it?
General mountain dulcimer or music discussions
Thinking a little more about this, I have been known call them a "herd." A friend of mine, an autoharp player, would walk out on stage with about ten or so harps to give a concert. I believe he called them an "embarrassment" of autoharps. We could probably appropriate that for dulcimers as well.
Ken
"The dulcimer sings a sweet song."