The premium-looking dual-driver KZ ZS1 are very good earphones to have, especially if you like decent bass. However, you'll most likely have a trouble fitting these into your ears properly.
KZ ZS1
ø8mm + ø6.8mm Dynamic Drivers
Pros
- Pretty clear sound quality overall.
- The bass goes pretty deep, if you can push the earphones deep enough.
- A very premium design and pretty solid build quality, even if plastic.
Cons
- The bass gets slightly distorted at high volume or deep bass drops (like in Dubstep and Trap music).
- It is very difficult to fit these oddly shaped earphones inside the ears and get a good seal.
Package & Accessories
Corrugated fiberboard
M, black (translucent), ø4mm red bores
S+M+L, black (translucent), ø4mm bores
Build & Materials
Plastic (glossy), ø6mm nozzles (ø2mm bores), memory-wire ear loops
TPE, soft strain reliefs
Silicone (grippy), 118cm, soft, straight
TPE, 90° angled, short, soft strain relief
Comfort & Fit
No matter how I placed it, no matter which tips I tried, they just don't stay all the way inside. I had to push them in as I listened to them to hear the sound properly.
Lows / Bass
The bass has impact and sound nice, but if your seal is too good it gets muddy. Either way, you need to get a perfect seal to hear the bass properly. When the bass gets deep, it's slightly distorted.
Mids / Vocals
The vocals sound nice, but sometimes overpowered by the bass. They are not so bright either, and have a dark-ish signature to them.
Highs / Treble
The highs are loud but not as bright as I would want them to be, which is probably the result of a bit too warm sound signature.