Had the pleasure of visiting Andrew and Leo at MusicTeck earlier this week where they kindly let me demo some IEMs including: Aroma Audio Fei Wan, UM Amber Pearl, and UM Multiverse Mentor.
Here are some impressions off my iBasso 320MAX Ti:
Aroma Audio Fei Wan (4.7k USD)
Mid-centric set with forward, lush vocals. Midrange resolution was pretty good, maybe a tier under the Annihilator 23's. There was some shout on certain tracks.
The bass was a bit of a letdown. Ill-defined transient edges and lack of slam with average texture as well.
The treble was mostly okay on the tracks I listened to, but there's definitely some treble glare present on some tracks. There's a large peak somewhere that adds definition to the leading edge of guitar plucks but also adds harshness that I found unpleasant.
Stage width and height were decent, but stage depth felt crowded by the more forward vocals. Imaging was pretty good.
Lastly, I have some build concerns with the resin shells. I think Fei Wan could have benefitted from using a sturdier material for the shells.
UM Amber Pearl (8k USD)
Very well-tuned IEM with no obvious tuning flaws. The bass was visceral, well-textured, and very engaging.
AP as a whole had a warm-learning, slightly analogue timbre. Resolution was relative to Annihilator 23's but could be slightly higher or lower. From what I remember of my Storm demo, I think Storm was slightly more technical across the board.
The treble was fairly neutral, so neither dark nor boosted, and it sounded mostly even. I found the dynamics to be very good as well. Staging was decent, similar to Fei Wan's but with a deeper stage. Imaging was pretty good.
As a whole, I found AP to have a very engaging, gripping presentation. The tuning, timbre, and techs combined put it among the best IEMs I've heard to date.
UM Multiverse Mentor (4.5k USD)
Also a very well-tuned set. Neutral/warm timbre with decent bass overall. Resolution was pretty good, relative to Fei Wan's.
The midrange tuning sounded similar to AP's but with less of the warmth and analog timbre.
The treble was slightly more bright leaning than AP's with more sparkle present. Very tastefully done.
Staging was pretty good and felt evenly distributed. I'd consider MM a well-executed neutral monitor. MM was less engaging than Amber Pearl, but it was a very pleasant listen overall.