@ClieOS
How is the ST-10 in the bass department. Does it reach deep and does it have impact/punch?
You liked the K's LBB and I agree that it has excellent qualities in the mids and treble for that price range, but the bass was just disappointing for me. Especially for a K's product. Wondering if the ST-10 has more presence than the LBB and if it can come close to the Willsound MK2 (slightly less is ok since that's got powerful bass).
Note that LBB or the Titanium Bell series are meant to be used with normal (non-thin) foam pad as they are tuned with foam in mind (*the maker even suggest double foam for those really want to get a solid low end). But you are right, they are not as bass-happy as their older siblings. ST-10's bass on the other hand is fairly neutral in quantity, but reaches down really deep. It has some of the cleanest deep bass I have ever heard on any earbuds, but it won't make any bass head smile as it is not really bass banging type of situation.
How's that Sony? Is the concept working? I assume that the bass is rolled-off to the point of no sub-bass.
This STH40D is actually quite decent overall. The fit is nice as it almost 'disappear' once you put it on and the SQ is decent enough for daily use, more of a lower-mid to mid-tier overall. For the main purpose of able to listen to the surrounding and music at the same time, I'll call this a win. This is far better than Ambie's (which is also a Sony spin-off) design on both ergonomics and SQ.