I received my Eikonas today and fitted them into the VTL cabs after the rebate had been enlarged for the new driver. Only played them for an hour but initial impressions are good. Bass goes deeper and they are very smooth at the top. Actually I'm finding them too smooth at the moment, the JX92's have more life but of course they can shout a bit on some material. Early days but I think I'm going to enjoy them.
Interesting that the old driver (left) appears to have a bigger magnet than the new Eikona.