Had the pleasure of visiting Andrew and Leo at MusicTeck a few days ago to demo some of their wares including the new $8.5k USD
UM Mason FS Soleil Tombé
All demoes were done on a 320MAX Ti and a Shanling M9+.
UM Mason FS Soleil Tombé:
The Soleil Tombé has a neutral to
slightly neutral-warm tone. It's more neutral-toned than both Mentor and AP. Soleil Tombé is very clean sounding without sounding dry. It's more detailed than both AP and Mentor by a good margin, and is the second most resolving IEM I've ever heard, second only to STORM. I'm able to pick up trailing tones very clearly, and the transients are very detailed, bordering on sharp.
Soleil Tombé is fairly balanced across the frequency spectrum. The bass is decent, the mids and treble are well-done. Imaging and dynamics are around AP level.
Amber Pearl to me has the superior bass, while the Soleil Tombé outclasses AP in sheer resolution.
Soleil Tombé has a perceived peak in the upper-mids/lower-treble where it can come across shouty or edgy in this region. Mentor had a similar issue to me but the peak on Soleil Tombé sounds sharper. I was able to control the Mentor's peak with tip-rolling but I was unable to on the Soleil Tombé.
For my personal preferences, AP > Soleil Tombé >= Mentor.
MusicTeck is now offering the Soleil Tombé without the stock cable at $6.2K USD:
https://shop.musicteck.com/collections/um-unique-melody/products/um-mason-fs-soleil-tombe