Perhaps a really large beer mug?
So far I've been testing the HA50p on my MacBook.
I found Teacs app to be a touch temperamental so I'm using Audirvana Plus.
The Rig -
Beyerdynamic Tesla T70p
Yep that's All Along The Watchtower by David Matthews Band.
Sounds extremely detailed, A touch more bass than I'm used to but it's not overbearing.
Mids are slightly forward but nice and smooth.
Highs are crisp and snappy.
So far I'm very pleased I made the jump :)