Almost a year ago, Sony announced their first balanced armatured based IEM, the XBA series. Just a short while ago, they announced the latest addition to series, namely XBA-10, XBA-20, XBA-30 and XBA-40 (showing above). To be frank, besides using two new colour schemes and switching the cable from OFC to PCOCC (a type of OFC nonetheless), I don't detect any difference between the the current XBA series to the new addition by looking at the product pages,. In fact, the spec as well as the MSRP are identical between the old and the new series. If I had to guess, I'll say the new series looks much like a yearly minor reversion rather than actual upgrade. Well, time will tell as the new series will be released soon.