WOW this is an insane combo. Archel2 Pro and Beyerdynamic T1 Gen 2. The treble peak all but disappears with this amp.. idk how but it just does and is sibilant no longer. And the cleanliness and resolution of the Geshelli really shines through, with bass that's super tight and slappy. I have an LCD2C coming in soon, very good chance I will sell that for one of these instead.