This is my first Balanced Armature IEM, FIX XE-701 is Korean made IEM, it is a single BA driver, the built quality is good, the cable is a little bit stiff but it may not be break easily.
When I received it, the sound quality is very bad, really bad, there is NO BASS at all, I made this decision to purchase this IEM based on the web advertisement which compare Sony XBA-10 with XE-701, the advertisement is actually a video about public poll somewhere in Seoul which shows that many Korean passer-by give thumb up to the XE-701 than XBA-10.
The high treble so airy, vocal seem quite distance like 3D surround effect. I thought maybe I got a defected product but I give some break-in a few days including some pink noise break-in.
After 2 weeks, I can hear the bass ONLY when I try hard to listen to it in the middle of the night when everyone already sleeping and very quiet. I tell myself that I am not a BA guy, but what I audition about other BA IEMs in headphoneshop.co.kr
they sound quite pleasant and smooth, some of the multi BA drivers produce nice solid bass, so maybe I need to keep hunting for multi BA drivers.
The right side of the ear piece has a mic, hence the 4 sleeves audio connector, the cable is split to left and right with a simple Y splitter but the shape is a little bit strange because seem like inside the middle of the Y splitter there is a solder joint to combine 2 cables, the stamp "made in China" is all over the product .. :-(
I wish I can open the IEM behind-cap so I can replace the cable with a better quality, but I am afraid to break it too soon.