Tanchjim Oxygen

Excellent Sounding Tiny IEM!

PROS: Great sound quality – Harman-ish tuning, comfortable natural sound signature, good deep bass, clear mids with smooth but defined treble, good resolution for a single dynamic driver, build quality, packaging.

CONS: Fit isn’t the best yet stays in your ears comfortably, a single better cable could’ve been provided instead of two different cables.


I would like to thank Tanchjim for sending me the Oxygen to test and review. I am not affiliated with the company or any of its sellers and write this review with an unbiased opinion regardless of how the review turns out.

My background.

I am a professional musician, producer and audio engineer with experience in the performing, recording and pro-audio industry. I test products on a technical and musical level and try to write reviews as simple as possible from a music fan’s perspective.

Genre preferences.

I majorly listen to rock, acoustic, pop and metal and occasionally listen to EDM songs which are doing the rounds on the radio and charts.

Technical Specifications

  • Driver Tech – 10mm Dynamic Driver
  • Diaphragm Type: Carbon Nanotube Diaphragm
  • Frequency response: 10–40,000 Hz
  • Sensitivity: 110 dB
  • Impedance: 32 ohms
  • Plug: 1/8 in (3.5 mm) Gold-Plated Line Plug
  • Cables: 1.2m OFC Silver Plated Cable Without Mic & 1.2m OFC Cable with Mic
  • Interface:0.78mm 2Pin

Available for sale on Amazon.

About the product.

Tanchjim Oxygen is a single 10mm dynamic driver in-ear monitor which sells for around $270. It is available in 2 color options, silver and black.


Included in the box.

  • Oxygen
  • 2 Cables – One with mic and one without.
  • Silicone eartips – 7 pairs
  • Carry Case
  • Metal sticker with brand name and logo
  • Warranty card, counterfeit protection card and short user guide


Build Quality.

Tanchjim gave me choice of color and I chose black. The shells are made of metal and are finished very well. One shell spots their logo and the other spots the name ‘Oxygen’. The seam between the faceplate and the shell is done perfectly too. The color plating is so good that there isn’t a scratch on the shell or the nozzle in my 2-month’s usage. Or maybe I haven’t used them in extreme conditions enough.

They’re one of the few companies who include 2 cables in this price range, one with mic and one without. But sadly, both the cables don’t live up to the premium feel of the package and IEMs. I would’ve been happier if they included a higher quality cable as stock in the package even if they had to chuck the mic cable to cut costs.

Tanchjim Upgrade Cable.

Tanchjim however sent me their upgrade cable too and I love it! The wire is 5N single crystal copper. It is covered in a black cloth sheath which looks very good and gives me an impression of being solidly built. The connectors and jack are of good quality too. This cable conducts better than the stock and is definitely an upgrade.

Fit and Comfort.

Oxygen’s shells are extremely light to be comfortably worn for long periods but if you’re looking for a snug fit where the nozzle goes in and the rest of the shell fills up the concha, sadly this is where the Oxygen falls short. As some people reported, the nozzles really are short and stout. It would’ve been great if they had designed it to be a little bit longer. Nevertheless, the shells sit in my ear well and don’t fall out if my shake my head heavily. Most of the time when I’m wearing it, I don’t even know they are there.


Page 2 – Sound analysis, Comparison, and Conclusion.

4 thoughts on “Tanchjim Oxygen

  1. Hello, I want to ask something. Can you give the impression of oxygen upgrade cable? I want to buy it but doubt that it’ll that good compared to the other cable with same price bracket haha


    1. Hey! It’s actually quite a good cable and I have it paired with KXXS at the moment. The only downside is that it doesn’t have a chin slider. As for cable pairing impressions, you need to tell me what your current IEM and cable pairing is or the IEM you’re wanting a cable upgrade for.

      It’s surely an upgrade over Oxygen and KXXS’s stock cables but then brands like Electro Acousti (EAC) and Null Audio have very nice UP-OCC Litz cables for the cheap starting at around $80-85, which I would suggest going for instead, unless you like the cloth wrap look of the Tanchjim upgrade cable and $60 is your budget limit.

      Here is my review of 2 EAC cables -https://twister6.com/2019/11/27/electro-acousti-cryo-litz-7n-up-occ-7n-scc-cables/


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s