Here is my take on the Hidizs MP145 IEM and they use a 14.5mm planar driver and three different pairs of tuning nozzles for different tunings.

Purchase link :

https://www.kickstarter.com/projects/...


Store link :

https://www.hidizs.net/products/hidiz...

Graphs - https://vortexreviews.squig.link/?sha...

Timecodes :
0:00 Introduction and disclaimer
0:31 Specs, unboxing and first look
3:47 Review intro
4:00 Cable overview
4:19 Comfort ( also minor vacuum effect )
5:24 Instrument separation
5:32 Timbre
5:47 Technicalities
5:55 Stage
6:17 Tuning nozzles
6:35 Different tunings
6:57 Bass
7:20 Mids
8:00 Treble
9:27 Conclusion