So is it safe to use compressed air on headphones?
I think compressed air is fine to use on most headphones. Keep in mind that compressed air carries with it water so be sure to spray at a distance or make sure the first spray or two of water is done prior to going straight in for the kill.
Why would you do that? the driver looks clean If there is something inside, shaking it should be enough.
Compressed air on such a things isn't very safe.. You have no idea how thin the top of the driver really is..