UiiSii HM7
ø9mm Dynamic Driver

After the HM6, I tested the newer HM7, which have the same drivers, as proven both by the specifications and by measurement. However, these pretty and well-constructed gems sound much better! The lows have slightly improved, but the highs have improved noticeably and now the sound is crisp and precise. It is also slightly louder. It may have something to do with the much wider nozzles, or the wider tips you get with them. Anyway, these share the same qualities as the boarseman CX98 - a bright and precise sound, with a moderate bass response and slightly less brightness in the highs.

Sound signature: V-shaped

Buy on
  • Extreme level of detail with a bright sound signature, and enough bass to keep things warm.
  • The build quality is superb.
  • These earphones smell amazing!
  • In my opinion, the package is very nicely designed, just like ROCK's products.
  • There is basically no sub-bass, but I bet it's the intended sound signature.
Package & Accessories

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 openings), soft strain reliefs


Plastic (matte), single-button


Metal, no strain reliefs


Silicone (rugged), 128cm, 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. They have an orb-like shape, and fit in a very specific way into your ears and stay there firmly.

Lows / Bass

These earphones still don't have a superb bass, but it's less flat than the previous HM6, which makes HM7 more fun to listen to. There is enough bass to fill the mids with pleasant warmth.

Mids / Vocals

Extremely clear and vivid vocals, and are also pretty loud. Mesmerizing channel separation. The high-mids and highs were indeed improved in clarity.

Highs / Treble

The treble has improved significantly, and the sound has a pleasing brilliance to it.

Frequency Response