TRN-TA1
Burn in:
Out of the box: vocals (both male and female) 8.5/10, mid bass is recessed, sub bass (6.5/10) is there, but only when the song really calls for it. The higher frequencies (7.5/10) are good, but won't compete with higher resolving offerings. For my sensitivity to the 2 khz - 4 khz, fatigue free.
35 hrs. in: everything from OOTB, with the sub bass (7.5/10) and the mid bass becoming more present; not domineering, just what's needed, for the lower range. Not basshead good, as the TA1 doesn't deliver that visceral thumping sensation (on my iPad), but I'd still use them as a daily.
Build:
TRN is onto something. As others have said: finish, weight and machining are top notch. Very important to note, for those with smaller ears, this footprint is for you.
Playback:
Great option for connecting directly to your old phone or iPad, via SE. The last IEM that I can recall, to play this well on a standard setup, was the iBasso IT00, with the bonus of no (zero, nada, nein, ...) driver flex popping. The only (ever so slightly) knock that I would give the TA1 (connected to my iPad), is the overall delivery makes me want to crank up the volume (but that would become an irritant, to my sensitivity, to the upper range), as the TA1 feels mildly handcuffed; this will probably be resolved once I transition to a balanced cable, on my Qudelix-5K, but I want to round out the burn in to +50 hrs.
(
do not proceed, if you have a sensitivity to cable merits)
Just for grins, after removing the cable for the photos, I connected my balanced, NiceHck DarkJade (via the 2.5 mm to SE converter, that comes with the original Shuoer Tape) to the TA1 and put them back on the iPad. Holy Smores, I can hear it, I can hear it (@Dsnuts, @paulwasabii), a mixed graphene cable (that costs more than double that of the IEM) upped the width of the soundstage and overall presence.