Ticho: I have a collection of Rovner ligs including the darks, lights, EDII's and EVO-5 (I THINK that's what they call it). Sometimes they work fine, other times they tend to dampen the buzziness or take out the brilliance.
I suspect that the individual reed one uses at the time has more bearing on what the Rovners do than the Rovner of-whatever-design itself.
Specifcally, the EDII probably does the least to dampen the tone, in my experience. Still, they aren't quite as buzzy as a stock metal lig. Plus, the little lead-slug inserts (don't know if they are really lead, they just look that way) on the EDII constantly fall out of my EDII ligs. I've lost some of them. But you know what, whether the insert is there or not, the lig plays the same for me. DAVE