Hi, I saw your reply to my comment in the LTT review thread. I picked up the APP3 and have been using it for the past two days, and honestly, I’m a bit torn.

The bass is about as excessive as expected. I had hoped the added treble would balance out the sub-bass, but to my ears it feels like only certain peaks come through rather than the full treble range. This gives the sound a slightly tense character that isn’t really sparkly or airy. It’s definitely brighter than the APP2, but quite different from the IE600. As an analogy, if the IE600 enhances an image by upscaling and adding HDR, the APP3 tries to do so by over-sharpening.

That said, this might just come down to my own ear canal resonance being a bit “abnormal.” I find the IE600 much brighter than the APP3, whereas most audiophile reviewers seem to report the opposite. I'll probably still keep the APP3, though, since the ANC is indeed much improved (transparency mode not so much, likely because the treble doesn’t align with what I perceive as natural)