Maybe it's a bit OT but any reason why it's not on the production model of the BA200s anymore?
It is on the BA200 ---- it's just that it's still a prototype version of the 1723 that TDK is using. They probably ordered a lot of them, and have to use them up. It basically has the same drivers and setup as the finalized wholesale version, even has the same laser etching of the numbers, but because the BA200 has the crossover and impedance corrector located in the Y-split, it doesn't use the PCB board.
(BTW, I am looking forward to the BA300 --- very hopeful that it's coming, perhaps in a few months' time --- entirely my guess, but an educated guess nonetheless)
See that it says '1723W' but doesn't have the PCB board:
I guess this is a little OT, but yeah, CW made a smart move using it. Honestly, the reason why so many people are adopting it is that it's just so easy to use and sounds great out of the box, so little tweaking is necessary. As I mentioned with the L12, its major 'fault' is that the bass sounds a little boring, not exactly very layered/textured. I actually made a similar criticism about the BA200 when I had it, except that my standards have now even gone higher. Mids and highs are very good for a single tweeter, though, as the AcuPass acoustic low-pass keeps the low driver out of the way of the mids and highs. The SE846 is using the same principle, except even more advanced. The 1723 seems like a simplified, cost-effective version of the technology they help develop for the SE846 (but not specifically for the SE846, Sonion has been exploring the acoustic low-pass principle for many years, beginning with Klipsch, and UE with the UE4Pro, so they've been doing it since 2008 or so). The 1723 is just the first "generic", non-customized version of it for the masses. Honestly, Klipsch was onto something, but they went ahead and watered down their whole product line...
Back to CW --- I would recommend the L12 to people who aren't willing/able to plunk down the big bucks for the L51a or QD. It is already tough, psychologically, to cough up $650 (will likely end up being $750+ after all the options and import, etc.) for "only" a dual driver though. You're mostly paying for the Japanese-made build quality (though I'd argue that CW's quality is not quite at the same level as FitEar) and the access to the cute faceplates. For the same price, you can get better products from other manufacturers, IMHO.
The CW-L01/P are for people who want a custom ER4S/P, and just want a slightly different flavor. I haven't heard the CW-L11 or L31 yet, so I can't comment.
She does have a noona complex to her though. I keep forgetting that she's only 27. Some "idols", like Narsha, are older but manage to look far younger.
