By the looks of it, it's supposed to be the big brother of the great KZ HDS1. How do they compare? KZ ED3 Youth Version wins in all accounts - sound clarity, bass quality, loudness, and even reacts better to amplified sources.
NOTE: This model was most likely discontinued. It is very difficult to find for purchase.
The sound is amazing. Bass is punchy just enough, mids are detailed and the highs are clear and sharp.
A robust and nice looking housing.
The vocals tend to be slightly shrieky, similar to KZ ED10.
The paint on the housings can be scratched and peeled off pretty easily.
The same gut-like cable KZ uses for their products.
The splitter is way lower than chest-level and makes the cable wiggly and hard to control.
Package & Accessories
Ear Tips - Single-Flange:
S+M+L, black (translucent), ?4mm bores
Build & Materials
Metal (painted), ?5mm nozzles, soft strain reliefs
Metal (painted), single-button
TPE, soft strain reliefs
Silicone (grippy), 113cm, soft, straight
TPE, 90° angled, short, soft strain relief
Comfort & Fit
I got a good seal with the pre-applied M-size tips. No problems at all. Still, the generic tips aren't the best at keeping the earphones inside.
Lows / Bass
A great bass quality and depth, just in the right amount, not too much sub-bass. Doesn't overwhelm higher frequencies, but also lacks significant impact.
Mids / Vocals
The vocals are very clear and precise. The great clarity and warm sound signature result in an enjoyable and exciting experience.
Highs / Treble
The highs are bright and crisp, but slightly cold and overemphasized, almost as bright as KZ ED9.