They do take a long time to break in. But one thing is for sure.....the bass is clean. I have now disconnected the sub, as I feel that the bass, even though it is less than expected, is more integrated. This make it sound better than the sub.
I have not been pushing it to very high volumes, hence maybe the longer break in. The highs need to get better. the mids are fine....I have been using Lowther PM6A's and do not miss the mids on the ZOB.
Imaging is very good and precise.
BTW on another note..... this is my first fostex drivers. What is this things about connecting the negative to the frame tweek?
shreekant