Chinese company Somic, makes few in-ear headphones in its mh series:
401,403,407,410,417 (with the 'i' versions with microphone)
Since there is no source of information about those iems, it makes even hard to choose one for random testing.
I own the mh407 and mh410 currently, so now I'll just make a very short summary about these models (later I'll add something more later, since I have to relisten to them)
Those use balanced armature unit (I think that they use 2 of those, however I'm not really sure).
And the sound is outstanding (at least the mids), they have large level of detail and clarity.
The bass is there and is actually good, maybe it does not go down deep.
The highs, hmm.. I don't remeber.
In summary those iems in sound signature kind of remaind me of sennheiser ovation headphones.
There are also very lound (kind of 20% loundness on my phone is equivalent to ~60% of loundness for rest of iems).
The one problem is that due to their low impedance - 12ohm (and sensitivity) on some devices some buzzing is noticable.
I was actually really impressed with those.
(ps there is some italian review of these iems)
Those are quite bright headphones, they have some aggresiveness, the bass is noticable, but is weak.
I only heard/found some (short) opinions about:
mh401 - bass spills to lower mids
mh403 - the opinion was negative