Tatu-
Yes, of course the Velodynes are terrific; but (and others will shoot me down no down) I really thougt the new M- sw5500 voiced better with the M- DSPs; Less boomy , but with the same punch;
My application room size though didn't warrant the D15s more like the D12s, so that's what I was comparing directly (SW5500's being 12s as well);

I'll check into the graph issue more - haven't used the M- software for that as yet...

ken