Also, just wanted to mention, I think they sound good...but also feel they're a bit hyped in the 2-4k ish area...only used them a little bit so far...but also not getting a great fit with any of the stock tips...which is nothing new, I've always had this problem with IEMs...and ear plugs, hence got custom ones...with the largest tips with the smaller bore, I got the best sound, but I really had to shove them way down into my ear...the rest were totally unusable.
Seems like it might be worth getting custom moulds for these...they're good enough for what I'd want them for, maybe buy another three pairs to justify the cost of the moulds long term...they sounded really good at one point when got them seated right after much fiddling...but even getting up and moving around and it fell apart...
Also they're plenty loud with an iPhone XS and the Apple dongle anyway, my ears were ringing after listening for an hour...(Apple Music lossless with soundcheck on)
I also spent a small bit of time manually sweeping around a sine wave with Audiotools signal generator...more or less confirmed some of what I heard, re 2-4k...
Also did small test were I EQed a mix (master bus) with these and then revisited it with my KH310As...roughly I was pushing this same area back up about 2/3dB on the 310s...below image the listening position response with my 310s (1/48 lines 1dB) for reference...this was all a few days ago BTW, before I read this thread at all, so genuinely no confirmation bias...I actually just read the review and bought them immediately based on Amirs "go buy them now" advice...total impulse.
Anyway bit of a rant...I'll get around to doing some better tests at some point...might try the aftermarket tips rabbit hole first, lol.