I don't listen to classical nearly as much as I should but from my Bach listening. They sound great to me however I would actually look into the JVC FXD80 over these for classical. Those have a imagery and high end detail level with great speed and a 3D like audible stage that is worth checking out for classical. The vented design helps in this regard..Try those for your classical for certain. Those have Carbon nanotube drivers and need at least 200 hours of full loud music burn in before they come proper however.
The XB90EX is a very versatile earphone and while it sounds great for classical these will excel more for EDM, Hiphop, Pop, vocals and even rock but for classical listening the FXD80 will be better if not one of the best for classical in the same cost range..The FXD earphones specialty is in the highs and mids with crazy imagery and they do have a dynamic bass quality to them with great quality low end.. These XB90EX has a more musical style flavor but also with one of the best stages for earphones I have heard but they do tend to favor the mids to bass more than the highs to mids which classical is more suited for.
Edited by Dsnuts - 8/29/12 at 11:45am