B3 have 2 drivers on each side.
If you burn them or play them with only soft music, bass driver will not be getting much burn-in process.
I suggest anyone having these problems to play bass heavy music during the nights (or while you don't use your iems) on moderate sound levels (for 15-50 hours).
If the problem continues I believe you can always send it back to Penon (if you bought them from Penon).
I strongly suggest any B3 user to check this page as well (about sound imbalance and taking care of): http://www.head-fi.org/t/711582/havi-b3-pro-1-impressions-thread/240
Thanks and I appreciate the link again as it is a really great resource. I did do all that you suggested before sending it back.
I sent it back mid last week and am just going to let the return date surprise me rather than spend weeks frustrated. Penon have been good in their communication through it all tho.
So I am down to my nad hp50 and an earmax er80 which isn't bad when you get a loose seal instead of my normal snug seal...
I do appreciate this thread tho as it increases the anticipation of the return :-)