Quote:
Originally Posted by
liamstrain 
They made the 880 Pro in 80, 250 and 600 Ohm, as far as I know.
Well, it is possible that those were made in the past, but I see only a 250 Ohm version here, and at this thread. If it is not an old used headphone, and it looks exactly like on the product page, then it is very likely to be 250 Ohm.