KZ ZST in-ear headphones will give you the best overall performance you can get at under $20.
Should You Buy These?
If you’re looking for earbuds under $20 that will satisfy your needs for good audio and user experience, these are the ones to buy.
They’re comfortable to wear, although you have to get used to them because they’re a little bigger in size and are worn behind the ears. Once you get used to the behind-the-ear fit, you’ll appreciate their light weight.
It’s worth getting extra foam eartips to get the best comfort, sound, and noise isolation as this makes them perform like much more expensive earphones.
Add a memory wire that helps them stay in the same place and the lack of cable noise, and you’re getting fantastic value for the money.
There’s not much to complain about. The only thing might be the lack of foam eartips—you get only silicone tips—which would make them perfect.
Considering the price, the sound is terrific. Slightly V-shaped sound signature makes every music delightful. They have a capable and controlled bass with detailed treble without any harshness or sibilance.
The ZST sound like a poor audiophile’s in-ear monitors.
KZ ZST are enjoyable, durable, earphones, with a somewhat balanced frequency response (slighly V-shaped), that will satisfy your ears and your wallet. Easily the best earbuds for $20.