@Nabillion_786
If you’re looking for thick mids, the KC09 aren’t exactly the best. I find the upper-mids and lower-treble a bit hot, as well as the mid-bass being a tad heavy. The bass and treble sorta drown out the mids, making them feel slightly hollow and muted. When I think of “thick mids,” the following come to mind: Urbanfun Hifi (super thick midrange with excellent resolution; mid-bass can be a bit much at times, but then again I’m not a bass head), TRN V20 (v-shaped, but warm and somewhat bassy), NiceHck HK6 (these have a phenomenally thick midrange with a wiiiiide soundstage and great details; but my only complaint is that, again, the mid-bass is just a little too much for me), and the iBasso IT01, as mentioned before.
I saw that you had some concerns about the mids on the IT01 being too thin or underemphasized as some user reviews stated. As a fellow midrange finatic, I can assure you that the mids are excellent on these. Male vocals feel very intimate and full, with the right amount of body. Instruments are also full-bodied with lots of texture, definition, and separation. They’re technical monsters in that regard. I have no idea why people are calling the mids on the IT01 “thin,” but I completely disagree with that statement. Everything feels extremely lively and engaging and the midrange has some excellent transparency and clarity. Even the bass is so well done. I love sub-bass and these babies deliver.