You can check this post by ericpalonen https://www.head-fi.org/threads/unveiled-meet-the-hd-620s.972764/page-8#post-18116790 and solderdude's measurement:

An interesting and overall very positive and informative review by Solderdude: https://diyaudioheaven.wordpress.com/headphones/measurements/brands-s-se/hd620s/ -- despite his rig not being industry standard; taking it with a grain of salt, it's still somewhat interesting for relative...

Dynamic drivers :blue_heart:

The graph is available on their weibo page (+ marketing stuff): Plotted it on REW for a better scaling reference:

Great work! Will the beyer ones slip on the notch of the DT1990?

Hey, does anyone from NA know a place to buy the stock analytical pads? They are my fav for providing the flattest FR and thus easier to EQ it to my taste but I can't find it on beyer's website, only the EU one but unfortunately they don't ship it overseas.

SoftEars is coming up with an entry-level product. 1DD+2BA. More than 1000CNY should be realistically around 200-250USD? Interesting.

@MOONDROP out of curiosity, is that normal for the KATO's brass filter to start showing signs of oxidation? I've been using it for 3-4 days and storing it inside a pelican case with silica packets but it seems only the area that was with the eartip mounted on is starting to turn green-ish.

I also got a shipping notification from the official store on Ali. Just hoping it's indeed the matte version that I ordered. :stuck_out_tongue:

I was checking the Moondrop's Taobao, and wow the 'K' cable is way thicker than I thought.

Regarding the Quarks' driver:

Well, somehow it seems crinacle's rig adds a couple of dBs at the pinna region. The official measurement using a B&K 4128 the pinna region is at ~14dB. You can observe the same effect in Tanchjim Tanya since it's hitting close to 20dB on his rig as well. UPDATE: New graphs:

They shared more details and a graph on Weibo as well: It looks cool at the first look, but using WPD to grab the graph and when placing it into a more conventional scaling it seems a very spicy tuning and the most upper-mid forward among Tanchjim's lineup. (both graphs normalized at...

Hey @HuoYuanJia, do you have any info about this new "mystery" IEM? I got this from a Weibo user: plain translation from chrome: I know "moving iron" means BA when translated and "moving-coil" means DD, but "one ring" bugged me a bit.

The new version of Tanchjim Hana is available now on Shenzhenaudio: https://shenzhenaudio.com/collections/all/products/tanchjim-new-hana-earphone-dynamic-hifi-in-ear-iem-monitoring Interesting they listened to the community feedback, I'd guess the tuning now would be very similar to Oxygen...

Full video: https://imgur.com/kZFyvMw From their weibo:

I had the same question so I contacted Linum, that's the answer:

Might the graph is interesting for some. :D

https://precog.squig.link/ :wink:

From Shenzhenaudio rep: Then someone sent this pic asking if it was Prism:

WPD is your friend. EVO RA-0045 x Harman IE: EVO RA0045 x EVO Precog (just for fun):

Most reviewers seem to use the 3.5mm variant connected to an Apple dongle + adapter for mic and headphone out. Example: crinacle's rig

New Ikko is up to buy now: https://ikkoaudio.com/product/ikko-oh1s-gems-earphones/ Might 'bad' news for some but it seems they switched to MMCX.

Herbert (Moondrop's CEO) posted a graph on their discord for the "Variations": Dunno if it's just a prototype or final tuning, but FR-wise it follows their traditional harman-ish target. And also their new ultra-budget (~$10 USD):

If by "stop working" you mean one side getting considerably quieter than the other it very likely could be ear moisture building up and slowly clogging the nozzle screen filter, which sort of blocks the air passage (so letting it sit/dry out fixes the issue as described by you). This issue is...