UiiSii US90

ø9mm Dynamic Driver


UiiSii US90 probably has the same drivers that the HM6 and HM7 have, and even the build quality, nozzle diameter and tips are the same as HM7. The sound signature is basically the same, but the mid-bass is more boosted and the clarity in the mids and highs are not as good, for some reason.

If you're planning to buy these, I'd recommend going for the HM7 instead - they look more serious and sound a bit better.


  • Nice level of detail with a bright sound signature, and enough bass to keep things warm.
  • The build quality is simple, yet very nice.
  • These earphones smell amazing!


  • There is a bit of mid-bass bloat and some dirt in the mids.
  • There is basically no sub-bass, but I bet it's the intended sound signature.
  • The cable could be sturdier with a harder jacket and some proper strain reliefs.

Package & Accessories


Soft paperboard + soft plastic (clear)

Ear Tips - Single-Flange:

M, white (translucent), ø6mm grey bores

S+L, white (translucent), ø6mm bores

Build & Materials


Metal, ø6mm nozzles (ø5mm bores), soft strain reliefs


Plastic (matte), single-button


Metal, no strain reliefs


Silicone (rugged), 130cm, soft, straight


Metal, straight, short, soft strain relief

Comfort & Fit

The earphones are tiny, light and comfortable. They have an orb-like shape, and fit in a very specific way into your ears and stay there firmly.

Lows / Bass

These earphones don't have extraordinary sub-bass. There's quite a noticeable mid-bass boost, that is more noticeable on US90 than it is on HM7, which adds some muddiness to the sound.

Mids / Vocals

Very clear and vivid vocals, and also pretty loud. There's some clarity degradation compared to HM7 and vocals sound a bit more fat.

Highs / Treble

The treble is quite excellent for such cheap earphones, yet a bit worse on the clarity department compared to HM7. Overall, the highs are bright a crisp, but just a bit dirty.

Frequency Response

Published on 2016-02-11 12:38:38 (GMT)
DT200 GT500 HM6 HM7 i1