Some early notes on K319.
Speed and instruments separation are terrific, I can not imagine any music piece may congest K319, either it is orchestra crescendo, speed metal, symphonic metal or psy trance. Yes, K319 lacks some microdetails and harmonics comparing to higher competitors, but it also lacks any kind of veil - its clarity is absolute and unsurpassed by any other earbud.
Soundstage is pretty wide for earbuds, outside of your head, though yields in depth to the top Yuins. Add precise instruments placement here and you would be most likely pleased with K319 imaging capabilities.
Tonality is slightly dry, frequency response is pretty even, though some may call it bass-light when fit is improper. The only minor peak I discovered is located somewhere in upper mids/lower highs and is rather a feature than disadvantage. In general, K319 shows no preference to any particular frequency range or musical instrument, it is impartial and adds almost as less coloration as OK1/OK2 do.
Bass impact is from modest to neutral, depth is good and quality is excellent. Mids are distinctive and slightly dry, electric guitars are very welcome, voices are clear while lack decay. Highs are a bit accentuated while not extended well, so they are presented well though in some simplistic manner. At the same time I did not notice any harshness or sibilance with K319.
All genres sound well with K319, there are no faults or favorites. I can not call K319 either musical or analytical, fun or lifeless, it is rather objective and transparent - very clean window to the music made of the somewhat cool-tinted glass.