My pair of Oxygens arrived yesterday; I also purchased the Tanchjim upgrade cable mainly for comfort/ease of wear but the feedback on sound in this thread also factored into the purchase. I've only opened the package, and given them a brief listen this morning. The intent of my post is just to share some initial impressions for the sake of conversation; not to contribute towards anyone's decision to purchase.
-Shipping from China was pretty fast. I ordered the Oxygens off Amazon, and it was about 3 weeks to delivery. I ordered the upgrade cable from Penon and it arrived ~5 days earlier.
-The packaging is nice. Everyone seems to emulate the Apple box approach, which is fine with me. Everything was neat inside and well packaged.
-The iems have a nice weight to them without being heavy of clunky
-I got a great fit right away with the stock tips
-They practically disappeared in my ears 5 minutes in to listening.
-The upgrade cable is really nice with it's woven, braided outside. Very pliable, and comfortable. No comment on changes to the sound, as I went straight to this cable.
-I guess it's worth noting that I bought these primarily for travel. I had a pair of Oppo PM3s, but had the itch for some iems, and also loved the smaller form factor for travel.
-My first impression is that these are a fun, musical set of iems. I was immediately bobbing my head and tapping my toe without realizing it. That is a nice first impression, versus other times when I feel like I'm being too analytical right away and not enjoying a new toy.
-It'll take more time, but my intial impression on sound is full mids, enough bass to compliment the music and be accurate without beign overwhelming or too light, enough treble to highlight details and separation without being treble forward. This is pretty much my ideal signature, as it tends to make things 'musical' sounding to my ears.
-Oh yeah, the small carrying case is a nice touch. The iems, and cable fit just fine, and the case is quite small.
-I only plugged the Oxygens into my iPhone XS via the dongle, so I'm just barely scratching the surface.
-Later tonight, I'm going to do an extended session with my Hugo 2. Aside from the obvious step up with that DAC/Amp, I'm also looking forward to hearing MQA on these iems for detail retrieval.
-My first impression is that I am very happy, and these are going to be great for travel, or anytime I want to listen in the house and not be tied to my system.