I use planar headphones which are not too bad to drive, but most of the time I need some extra power. The deck actually is capable of blowing my eardrums out still
I'm betting that it can drive 250Ω headphones. Verifying.
EDIT: Yup. DT990s actually doing pretty decent.
EDIT 2: Not that I expect that OOP has actually nice-sounding and comfortable cans (the latter, along with repairability, is the reason that I have em in the first place), since they referred to them as "audiophile" headphones.