The bass is a little light. Also, the mids are certainly not forward. Maybe a bit recessed?
The treble seems fine, but I am old so I probably don’t hear treble like a young person would.
I am running these on my iFi Pro iCAN, which seems to be my favourite amp for planars. I have the bass set on the middle setting and I never usually go that high. I normally run the 3D sound effects on the middle setting, but I just turned that off and it seemed to improve the sound. The mids (vocals) now seem stronger/more forward.
I only listen to my GL2000 on a tube amp. Otherwise they don’t really do it for me. I pull them out for music I want an extreme sound stage, but otherwise they probably get used the least in my collection.
Unless you bought a used set with good hours on them, I’d say break them in. I had two sets of these and both needed a good burn in. I can’t recall exactly how long but my minimum with any new gear is 100 hours.
