Adding to Greg's post, I have a friend who has a system including Dynaudio Evidence Masters, Levinson 33 monos and the Levinson 32 pre and top of the line digital. He can hear every change to a component, cable, power cord, you name it, in that system. He's been trying out a Parc, and is very seriously impressed--to his ears, there's only improvement, and it's sonically not present in the chain (save for the obvious equalization it does, of course). The biggest difference he's noticed is how much more open and transparent the lower midrange became once the bass peaks were attenuated; and this in a system that sounded pretty damn good to begin with. He's got me seriously considering trying one out in my system as well.