rkraig@stanstrup I think they probably do. I've got a pair of HD650's and their parts are almost interchangeable between the hd580,hd600,hd650's.
rkraig I just bought this item and put it together. Feels like my HD650s in terms of clamp-force. Feel is nice. It's a bit strong, but my old head band was so flexed out that the headphones would just fall right off. Totally worth the money.