KZ Starline are tips that come with some KZ iems. There is a mod to reverse them. They become super soft and grippy a little bit like CP100 but wider bore and are very comfortable
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The flip tip.
You can do that with a lot of narrow bore tips to create a wide bore tip.
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I have flipped tips before. Canāt remember which but it was early days with the dunu zen. (might have been a stock tip for them)
The oxygen are just weird because they work with cp100+ SS (just got them) all the way up to XL and still have that floaty feeling.
Anyway, itās just odd. Just about every tip works. Maybe I am not used to IEMs actually fitting in my ears.
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I get that with the BL-05s that has super short nozzle so I have to use larger tips and they donāt feel that they are in my ear at all and float. In the end if the seal is good they sound good and they are super comfy.
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Now waiting to receive my O2 so weāll see how they compare for wise
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Received the O2 today. I donāt have any pictures because I wouldnāt take them out of my ears. Since they are supposed to be the king for acoustic music I listened to my favorite classical/baroque and they are amazing.
Then o switched to some Techno and toy surprise they are great at that too. They more analytical than fun but still a good listen.
For my library they are super versatile.
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Nice! Did you get yours during 11.11 sales too? Iām still waiting for mine to clear customs 
Also, people mentioned that the Oxygen 2-pin connectors have reversed polarityā¦which means any third party cable will need to be inverted before being connected. Does it impact the sound at all if you donāt reverse the polarity?
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I did with Express shipping. I hope you like it as well.
I didnāt know about this. Iāll have to check tonight. I hope that not the case because I ordered a cable on Linsoul.
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Iāll have to verify this today with a multimeter.
Iām using a third party cable and nothing seems āoffā as mentioned in PM.
EDIT: Verifiedā¦ 
Seems to be standard to me. Tip is left +, ring is right + and sleeve is ground. On the IEM end this translates to the + being the one with the dot (blue or red) being the one at the bottom when worn (i.e. ground is the one on top).
Iāve tested a few other cables including the one Iām using (from the Teas) and NiceHCK one and theyāre the same on the IEM end (both are TRRS though).
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Many thanks for checking! Maybe Tanchjim fixed thisā¦ From what Iāve seen on head fi, at one point they did acknowledge that the polarities were reversed. Glad to hear that the polarities are normal as I purchased an upgrade cable just for the Oxygen 
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I need to bite on this. If these are analytical, what are your fun IEMs? Or headphones.
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To be clear, this was when listening to Techno like Extrawelt. I like bass but it needs to be clean. Right now my fun IEM are Tape Pro modded with tuning foam and the Sora Light modded with the vent under the tips + Final ear hook.
Before this I had the Final E2000 (too warm but good SS) and the BL-05s (slow bass + bass bleed makes it boomy and muddy).
Iāve progressed pretty slowly but I have recently purchased more IEMs with different sound signature to figure what I like.
I have been doing A/B testing of my IEMs lately listening to various music genre I have on my music library. Itās been very helpful to me. For example, I liked the bass on the BL-05s before, but listening back to back with the Sora, I realized that the bass quantity was there but the quality was lacking. I found it slow, boomy and with bass bleed. Overall the sound was too warm on the Blon and also less detailed than Sora.
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Iāve asked on Discord and i got the same answer. Shouldnāt be a problem. Donāt trust everything you read on Head-Fi
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Thatās a relief! But you asked Tanchjim customer support and they said it was reversed polarity? Because someone posted screenshots showing their exchange with Tanchjim, and a reputable reviewer also wrote on their website that the polarities are reversedā¦
But, if thereās nothing to worry about and if I can use my aftermarket cables without having to reverse the earhooks, I am more than happy lol
Released my 3dt, fdx1, oxygen review. Was tough to get everything I wanted to say into this format. But here it is:
As always, constructive criticism, questions and any other helpful comments are always welcome!
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Hi, great review. I found it very informative.
A few points of feedback:
- It would be good if you could explain what you are trying to listen for in each song. For example I knew about the foot steps in M. Jackson song but not everybody would. Same thing for the other songs used in your review.
- You use the word ābalancedā a lot but it is very subjective and can mean many things.
- I like the simple conclusion at the end.
- I like the fact that you skip the unboxing and description of the box, tips, accessories, etc.
One question, when you mention treble in the review do you mean upper mid range?
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Ha! I knew I missed something. I normally do. Gonna add that to things to check for.
Great point! I am trying to stay away from audiophile terminology and I havenāt developed all the ways to describe things well. I am trying to target non-audiophiles as well. Gotta work on that.
This was an experiment. I am trying to avoid subjective recommendations based on my own bias. But, I also want to give some advice. So that was the solution.
Yep. The ālightningā in the name for me means sub 10 minutes for a 3 IEM comparison. I am trying to keep the content to things that canāt be looked up easily and requires possession of the headphones. Anything else is considered filler.
I typically mean roughly the right third of an FR graph when said generically. When I talk about midrange I typically say that. It is possible some of what I was hearing came from the upper mid range though. Just as I should describe what I am listening for, that would help avoid this confusion. I should screen capture playback controls for songs to identify locations as well. For me, the part I need to convey is āthis part of the song sounds scratchy or extremely intenseā etcā¦
I opted not to show the graphs on this review. And to only focus on music. It was a conscious decision that came out of targeting the non-audiophile more so than the audiophile. But, popping up the graph periodically might still be valuable.
Thanks so much for the feedback!
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I think you somehow read my mind and chose IEMs that I really wanted someone to compare! So yeah, I loved the IEM selection - spot on, especially for people looking to get a very nice DD IEM. I know you couldāve added others (e.g., Yuan Li, Hana 2021, Kbear Aurora, Penon FAN), but I like that you chose 3 highly-regarded sets to compare.
In addition to @Cameleon30ās excellent points, here are my two cents:
- Maybe you can list your test tracks, or link to a playlist?
- Add your source in the description
- Mention which tips you used (sorry if you do this already; I just donāt recall from the top of my head)
- I also like that you didnāt include the unboxing, but maybe you could talk about the fit?
Keep the videos coming! Thanks again 
P.S. Have you heard of Penon Serial? I saw youāre selling your 3DT, but it sounds like Penon Serial might be an improvement over the 3DT.
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They still vary a bit. I listen to a lot of music and occasionally some other song gets injected. But I will try and compile the list. (This one has it as indexes on the video. But not like an apple playlist). I have about 60 songs on my test list and the same few are usually selected. But not always. Still trying to figure out the best way to do this.
The video description should have the source info and tips. (In this case Qudelix 5k wired to macbook with epro horn shaped tips and apple lossless. But I will check.)
Not yet! But people keep asking!
Next is dq6, bl-max and mele. 
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Ooooh yes thatās a nice mix! Maybe KZ KEX as well??