you'd be well advised to return them to the factory for updating as needed. it will not be inexpensive but should offer listening satisfaction. vasken shahinian will not change anything that does not need it. see their site for contact info.
Modern Shahinian Obelisk
I have an itch to try some modern Obelisks; I have a set of older ones (the model with the large fabric midrange dome) and they are getting tired. I'm a little afraid of the latest model with metal domes, I have yet to hear a metal driver I like. What are poples experience with the latest Obelisks?