Ø9mm Dynamic Driver
UiiSii US90 is identical to UiiSii HM7 in every aspect, from build quality to nozzle diameter and tips, The sound signature is the same since it also contains the same exact drivers the HM7 has. US90 has lost a point just because, as you can also see by the graphs, the quality assurance wasn't great on this one, even if it's barely noticeable. Still, if you're going for these, I'd recommend going for the HM7 instead, they just look more mature.
Package & Accessories
Paperboard + soft plastic (clear)
Ear Tips - Single-Flange:
M, white (translucent), Ø6mm grey bores
S+L, white (translucent), Ø6mm bores
Build & Design
Metal, Ø6mm nozzles (Ø5mm openings), soft strain reliefs
Plastic (matte), single-button
Metal, no strain reliefs
Silicone (rugged), 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 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.
Reviewed on 2016-02-11 12:38:38 (UTC)