Since there has been a very thorough coverage of this new Super Balanced BaX from Linimum, I'm not going into my usual multi-page rambling. Sorensiim done a great job doing that already
What I wanted to do is to add a few of my closeup shots so you can see comparison between BaX, Balanced Bax, and Super Balanced Bax in more details, and offer a few impressions.
I already reviewed regular BaX, you can read my impressions by following a link in my sig. Don't want to rehash it, but since I had a recent opportunity to review AK120ii, it gave me a chance to compare a sound using 2.5mm TRRS balanced output of A&K DAP. When it comes to Linum BaX 3.5mm vs Balanced BaX 2.5mm, to my ears sound signature was nearly the same and the only benefit I heard was in a little bit of soundstage expansion due to balanced wired architecture where in my opinion with a DUAL dac of AK120ii there is a better control of L/R separation. Of course, this difference could be perceived as very subtle and limited by capabilities of your IEMs as well as your own personal hearing preference.
Going to Super BaX, where I used A83 and UM Pro 50 for testing, I was pleasantly surprised since I always referred to BaX as a "magic" EQ booster where you have to be careful regarding which headphones you use it with due to low end "slam". BaX worked great with A83, but was overwhelming with UM Pro 50. Super Balanced BaX actually tighten the low end, making it more controlled, even a slightly better separation from lower mids, and not as boosted as it was with a regular BaX.
In my opinion, once Linum gets this cable into factory production, instead of a hand made samples they have now (at a rather high price), it will be a great alternative to drive your IEMs from 2.5mm balanced HO of AK and soon to be released FiiO X7. Plus, as much as I enjoy how thin the original BaX is, I found a thicker braided structure of Super BaX to be more appealing!