UiiSii HM6
ø9mm Dynamic Driver

These are the first UiiSii earphones I'm testing. These pretty and well-constructed gems are a pleasure to use and take with you. The sound is clear and detailed enough, but slightly lacking loudness in the highs.

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  • The sound is really good and flat (some people like it).
  • The build quality is superb.
  • These earphones smell amazing!
  • In my opinion, the package is very nicely designed, just like ROCK's products.
  • The sound signature might be boring to some. Its treble is not remarkably fun to listen to, and the lows lack sub-bass.
Package & Accessories

Paperboard + soft plastic (clear)

Ear Tips - Single-Flange:

M, white (translucent), ø4mm grey bores

S+L, white (translucent), ø4mm bores

Build & Materials

Metal, ø5mm nozzles, soft strain reliefs


Plastic (matte), single-button


Metal, no strain reliefs


Silicone (rugged), 127cm, soft, straight


Metal, straight, short, soft strain relief

  • The cable has an extremely pleasant bubblegum-like smell.
Comfort & Fit

The earphones are tiny, light and comfortable. Their shape and size make it easy to keep them in your ears.

Lows / Bass

These earphones have bass, but basically no sub-bass. More than enough to enjoy the sound though.

Mids / Vocals

The vocals are loud but are somewhat off-note (darkened), which affects the detail of vocals.

Highs / Treble

The highs are slightly colored/darkened, and just a little brilliance to the sound. Still, sounds pretty good.

Frequency Response