KZ ZS3 Review: Best Earphones For People With Active Lifestyle

8.8 Total Score

An amazing pair of earphones that offer great value for money. Characterized by good sound quality and great comfort. The best pair of headphones for everyone with an active lifestyle.

  • Great comfort & isolation
  • Wide soundstage
  • Deep bass
  • Earbuds really stay on place!
  • High's could be a bit better
User Rating: 4.67 (6 votes)

Knowledge Zenith (KZ) is a well known Chinese manufacturer of high quality earphones for a low price. KZ have released a wide variety of earphones, that always have a good price quality ratio. In this KZ ZS3 review I will discuss the KZ3 into more detail. Overall KZ delivered another great pair of earphones, which positively surprised me on many aspects, like comfort, isolation and its soundstage.




The KZ ZS3 are delivering a great sound, marked by a wide soundstage containing a deep bass and clear mid’s. The most remarkable aspect of the KZ ZS3 is the soundstage it’s able to deliver. The earbuds of the KZ ZS3 are positioned deep into your ears, which enables to deliver a deeper soundstage then other earphones. When you listening to music with these earphones, your really get surrounded with the sound, like it’s all around you. This aspect is something the KZ ZS3 is really setting itself apart from other earphones. The bass of the earphones are also really nice, they deliver a deep bass, that is punchy, and being well presented in the music. Usually I don’t prefer a overemphasized bass, but I have the feeling that the combination of the wide sound stage, with the well presented bass, provides a great listening experience. On higher volume’s the bass, can be sometimes a bit overwhelming and pushing the mid’s away. However, I only experience this with ‘bassy’ songs. The mid’s are also of great detail, vocals are really clear, and being pushed a bit into the front.  Finally, the high’s are good but not excellent, I feel they could be a bit more presented, however for me this is always a trade-off. In the case the high’s are more presented, they earphones usually get unpleasant listening to them for longer hours, which is with the KZ ZS3 definitely not the case. Overall, they provide a really great sound that is pleasant listening to for long listening sessions.


Build Quality & Design

The KZ ZS3 build quality is great, as most of the earphones KZ released on the market. The earbuds are created of plastic, but the black shining paint is making them feel and looking great. The cable feels strong and has a L-shaped headphone jack, which is for me always a must, since they won’t break that fast. Besides the materials of which the KZ ZS3 is created, the earbuds are detachable. You can unplug the earbuds of the earphone cable. I detached them a few times, but it’s hard to get them back on the cable. I suggest to not detach them a lot, because I have the feeling you can easily break the pins on the cable. Something I really love about the these earphones, is that the end of the cables, the part where the cables are getting connected to the earbuds, is made of stiff material. You can bend the cable around your ears, so they will fit stay on place, and makes it almost impossible for the earbuds to fall out.

KZ ZS3 headphone jack
KZ ZS3 cable


As I mentioned in the introduction, the comfort is the part where the KZ ZS3 really surprised me. I never thought I would put so much value on comfort since I own the KZ ZS3. First of all, the shape of the earbuds makes them fit really comfortable in your ears. They sit deep and comfortable in your ears. In combination with the stiff cable ends, as I mentioned before, you can bend the cable around your ears. This combination makes the earphones perfect for using them being active, like working out. I like to go to them gym or to go running, and these earphones are my new favorites for this. They stay perfect in place, and besides the comfort they offer great isolation. You don’t hear any outside sounds, when you wearing the KZ ZS3.


KZ ZS3 controller
KZ ZS3 accessoires


Overall I am really surprised by the value the KZ ZS3 delivered to me. They exceeded my expectations by far. They sound they deliver is great, defined by it’s great sound stage, a deep bass and great mid’s. The build quality and comfort is also of a great level, which you can hardly find at this price level. Finally, the comfort is the part the KZ ZS3 distinguish them from it’s competition. The shape of the earbuds, he stiff part of the cables, and the great isolation makes them perfect for using them while working out and running. All in all, these are currently the best earphones you can get for everyone with an active lifestyle.


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