I am also interested in what the reasoning or advantage would be in a single-sided box call...
More difficult call to make, and more expensive to purchase, so I would assume that there would be some reason or sound difference that would create a market for them?
KYTurkey gave some reasons (as far as being easier to cluck and pur on)... Don't know if he is referring to that particular call or all one-siders though?
I would be curious as to what if any practical advantages a one-sider has over a traditional 2-sided call?