It looks like the "professional tuned" Havi B3 that I have is no longer being offered it seems. Bummer.
They have a new version though, which may be what people will be getting.
From their Taobao page:
Buyers Please Note: B3 is four dynamic headphones, which is double-sided dynamic headphones. The latest version of the B3 combines ie80 in low and loud sound field and layering tf10, the overall sense of hearing powerful bass, tenor vocals solid, mellow treble, the overall sound of the sound field broad, rich in detail, strong sense of hierarchy, dynamic and strong shake!
It looks like they boosted the bass a bit, upped the mids, and rolled off the treble extension, a la RE-400 style. It is probably still great, but now I need to find out the differences.
I ordered last weekend and unfortunately the seller only knows of one version. The seller is from aliexpress and gave me this reply: