Any comments on the SteelSeries Flux In-Ear Pro?
They measure well (but high THD; most of the Sonion 23XX series do), and I'm almost sure they use the Sonion 2359, which is a nice choice.
The Audio-Technica ATH-CK70PRO uses the same driver, and while it wasn't a world beater, I liked it, mostly. However, the CK70PRO will differ in FR because it uses a tapered acoustic horn and uses custom foam damping instead of the standard dampers from KA/S.
At any rate, I'm pegging it as a good mainstream buy (look forward to Black Friday for this thing), and as a good "gateway IEM" for casual listeners to get into hi-fi. It has the trendy flat cables (but only below the Y-Split (?), which is good) and all that jazz, and gamers will like it because of the brand. Good product planning on SteelSeries' part.
At the same time, people in Asia should probably take a look at the CK70PRO, which is being heavily discounted (at least in Japan). It's <$70 at the moment, which would make it a steal. Add on some forwarding fees, at it should still be less than the Flux Pro. It's certainly one of the most overlooked IEMs to come out this side of the International Date Line.
They sound good, no doubt about that. I did some quick A:Bs with some of the entry-level single-armatures I like - the UE 600 and MEElec A161P - and they about held their ground. Don't know if I would recommend it over those in general since there are some odd design choices like the modular plug with proprietary connector, but it's a solid buy and surprisingly on the balanced end of the spectrum for something from a "gaming" company.
I also quite like the regular Flux, the dynamic-driver one. It's a lot cheaper and seems to really get into the value-for-money territory. That one will get a review.