Apologies for the previous post. I accidentally posted impressions that were meant to go an another thread.
I got to demo these during a trip to Xiamen and these are some of my impressions. Disclaimer, I sadly only had a iPhone 6s playing Spotify Premium which is a slightly thinner sounding source but from what I read afterwards, the T9iE scale but still sound great even with okay sources/amplifiers.
The vocals on these are perfect for me. That was the first thing I noted. For vocals alone, I'd prefer this over the IER-Z1R (v shaped), IER-M9 (warm-neutral but I'd prefer a bit more warmth on lower midrange), IER-M7 (my personal IEM, which the M9 and the T9iE do better with female vocals), PP8 (amazing vocals as well but slightly lacking in warmth for my tastes), Andromeda (male vocals were thin), Solaris (better than Andromeda but male vocals were still lacking compared to the T9iE, female vocals were great on these though).
Timbre on these is quite well done here as well. These definitely have an emphasised midbass response which adds just a very slight amount of warmth into the lower midrange but not enough to push it away from neutral. Sub bass goes deep as well but I found the subbass to lack a bit of impact. I feel this is due to driving these out of an iPhone.
They also have a very smooth natural treble response albeit slightly rolled off. Separation, width, and imaging were good but not Z1R level. Depth however was through the roof, if the roof were forward and back!!
I really enjoyed these IEMs but they were beyond my budget at the moment (went home with the M7). From the IEMs I've tried, the vocals that come close are the ones on the Oriolus Reborn. That IEM is a lot bassier and lot more coloured though but it just does something that makes music so… musical?