Closed headphones for classical music

HD250 is really good; a bit of a dip in the midrange frequencies but you'll struggle to find a closed-back headphone that's better sounding, I think.

As long as the HD250 pleather pads provide a moderately good seal and are thick enough to provide a suitable driver-pinna distance, the sound should be great. If the pads are too shallow or not firm enough or open enough, the resulting sound can be a bit boomy on powerful bass tracks, with more closed-in stereo imaging. I put HD540II velvet pads on a HD250 Linear I and it sounded almost exactly the same as the HD540II (fantastic) so the pads do not necessarily need to completely seal for great sound to be achieved. Although if you're using the HD250 for monitoring recording, where you need them to isolate their sound inside the earcup, a good sealing pleather pad and a sensible choice of listening volume will get the job done.

Got them the other day, wow they sound great!!
I cannot believe I got this good sound for such a ridiculously low price.
Many thanks for the recommendation, Ash.

Yes, Graham was the original HD250II "fanboy"; I kinda jumped on the bandwagon a bit.