Well, I just got my Woo 3 today! Man it is gorgeous! My Grado RS2's don't sound all the great on it so far. I plugged in my old Senn HD590's and they sound alot better. My Grados sound awesome however with my ipod or through the headphone out of my Denon 3806. Is Grado's 35ohms just too low for the Woo? Anyone have the same issue? I simply love my RS2's and it would make me sick to not be able to use them with the Woo 3!!