I have a Lavricables Grand on the way for IE900,
review coming soon. Speaking of which...
My full review of PW Audio's co-flagship First Times Shielding is now online here. Enjoy the read.
I completely agree with the notes about bass and technicalities. It's quick and tight! But with the black background and copper character.
I can't agree about the highs, as I have even personally started to use FTS to tame Multiverse Mentor wild highs. And it seems to work even better than the darkish PWA MAS in this regard. There's a caveat that my hearing may be more tired in recent days due to many things going on, so I still need some time to confirm this for 100%.
What a stunner! +1 for measurements.
Only sorry that it's just a 5BA basic tier IEM

I hope he will develop more upper-end things in the future, as we can see he knows how to tune!
I took the opportunity to reformat this flattened graph a bit, maybe someone will find this helpful.
Now we see the bass bumped up to 7-10 dB from the middle mids maybe not at 1kHz but 800-900 Hz, and it's clearer there the upper mids and highs are relative to that.
I used to think that he doesn't compromise on quality.
Someone wrote that they are scaling up the production, and you know what that means? Interns

Lol, but most hi-end companies in portable have problems with quality. We even recently saw the Raven drama, then also N30LE rebias drama, etc.
My theory is that they might be used to compensate for driver variance
Don't think that anyone would have time to do this.
Companies base their production on
finished product design specifications.
If there are different components, that means that an intern has mistaken one component for another.
And maybe he is responsible for his own quality control (measurement) because the company doesn't want to afford a separate QC employee.
Or... mismatching a component may not be visible on a graph if it's a similar component. 1-2dB channel imbalance may fly under the radar.
Or maybe two drivers are used by a company interchangeably as they are very similar (or even the same).