Don't you have a neighbour or something? If you were in my town we could sort this in a jiffy but you've not disclosed your location.
I'm with @shawtuw on this one. Something's wrong. That amp should deafen you way before you reach even half-way on the pot.
Edit - I notice you've only posted this problem on this thread. Since the problem isn't with the headphones but the amp maybe you'll have more success posting in a Schiit thread.
Edited by Zorrofox - Yesterday at 2:58 am