My impression early below (repost from discovery thread).
AFUL is flexing again.
Plus: easily the most technical earbuds I have ever listened / built. It has a unique tactility sensation, snappy transient. The sound is also very “big”. Yet, the midrange is very “normal”, not much weirdness that happens when manufacturers try to squeeze “technical performance” (likely treble) out of these earbuds.
The wide stem of these shells work wonder with the fit.
Cons / deal breaker:
- It’s kinda hot in the upper frequencies. Maybe 4-5kHz.
- The stage is big, but also strongly “in-the-head” (edit: highly track dependent. Some tracks sound seriously large and not in-the-head). Like, cavernous stage inside your head rather than having the sound everywhere around your head like the sensation of some IEMs with tuning tricks + BCD.
- Pretty much mid-focused sound. There are enough energy at both ends, but it’s more (upper)mid-focused than usual AFUL.
- MMCX connector.
In general, I have never heard a portable gear that sounds like this. It feels like some sorts of open / semi-open headphones.
If you don’t like earbuds, I don’t think you should run out and preorder one unit as this one would not magically make earbuds work better for you. If you are deep in earbuds hobby, have a try. If you are just curious about AFUL newest R&D, maybe have a try. Just don’t expect other earbuds would sound this incisive if you happen to bite the earbuds bug
Edit: the midrange kinda reminds me of the tuning style of some HiBy IEMs. The way it emphasises the midrange makes some minute details in the voices pop out in a way thay even Cantor does not do, simply because it does not emphasis those frequencies like that.
Edit 2: forgot to mention. AFUL uses 15.4mm drivers rather than 14.2mm drivers like FiiO and Dunu. So if your ears cannot fit the old school earbuds (MX500 shells, these would not fit). If your ears are too big for the smaller 14.2mm driver, these AFUL buds would be good option.
If you are unfamiliar with IEM world, AFUL is a pretty decent IEM boutique. They tune well and engineers their IEMs well with interesting techniques based on simulation and their precise 3d printing. They like to do some excessive R&D projects sometimes, like their MagicOne IEM.