I was looking for an IEM that is as close to Stealth as possible without having to do any EQ'ing and at the top of my list was the Thieaudio Monarch MK2. Two days ago I found out that it is also
available here in Germany, so I ordered a pair immediately and I received it today. I am not an IEM expert, so I started fiddling with the tips, trying to find a comfortable position, as I have narrow ear canals.
If I insert them too deep (which is the normal thing for most people, I guess, but for my ears it is uncomfortable), it becomes a bass head machine. It can give you shivers. I had a few "oh, crap" moments. Pulling them out a bit it gets closer to what you see below. But I think it is much closer to Expanse than Stealth, which is not a bad thing. If you position it a little bit more further out, than it is much closer to Stealth, but it starts to lose its balance and the mids start to become nasal.
One nice thing is that, these are higher impedance IEMs (36 ohms) IEMs, which is a good thing as the output impedance of the DAP / amplifier has less effect on the sound in such a multi driver configuration. Sensitivity is OK at 108dB.
All in all, I think Monarch MK2 has a very good tuning and can satisfy the Expanse and Stealth lovers that are looking for a well tuned IEM for occasional use.