Philips EM 6721

I bought these cans
 2 monts ago. They were in very good shape . If you try to put them into comp sound card ,they will need some more power ,couse they are on 800 ohms. in comp there is a standard up to 32 or 64 ohms.They look very nice, but  not much comfort after 2 hours of listening.They are very good for ambiental,classical, pop,  downtempo and tech-trance music.