I sometimes do special orders like this one here. This is the JAR600B but based on a vintage black silk pair.
These have the widest soundstage than any of the 6x0 designs I’ve made and they are my favorite next to the JAR800. Just look at how transparent it is. The design uses zero foam, and so you get direct driver awesomeness, without all the bad side effects of doing that.
I didn’t know a HD600 could sound like this. Take the stock HD600, remove any shoutiness and brightness, open up the staging and improve the resolution, and this is what you get.
But these are very difficult to make and require a lot of care and attention. It is insanely time consuming, so they are treated as special orders.