buonassi
Headphoneus Supremus
cant tell for the 220 but the QP2R ( on Bal out ) sounds better to me as the 200.
Even for high sensitivity, multi BA drivers (IE 64 Audio, Oriolus, Campfire)? Isn't the QP2R too powerful? I'd think it would result in a hissing cat. But I don't know about current mode amplification, so I'll have to defer to these engineers that keep getting mentioned.