KZ ZST

The KZ ZST's sound quality is in the 88th percentile, making it one of the best-sounding pairs of earphones you can get for under $20. The social proof is even higher, in the 96th percentile, so a massive number of buyers agree. The trade-off is a cheap-feeling cable and a mediocre mic, but for pure audio performance, this thing is a steal.

The main event here is the sound, and it's a standout. The hybrid 1DD+1BA configuration pushes out a lively, detailed sound that's well above average. Bass has a satisfying thump without bleeding into the mids, and the treble has enough sparkle to make cymbals and high-hats sound crisp. The 120 dB/mW sensitivity means they're dead easy to drive from a phone or laptop headphone jack. The mic quality is a different story, landing in a mediocre 45th percentile. It's fine for a quick call, but don't expect to record a podcast with it. The build quality is a weak spot, sitting in the 35th percentile, and the cable feels like the first thing you'll want to replace.

Stacked against the competition, the KZ ZST carves out a clear niche. The Soundcore P31i and EarFun Air Pro TW230B are wireless, so they win on convenience, but they can't touch the ZST's raw sound quality for the price. The JLab Jbuds Pods ANC and TOZO Crystal Pods offer active noise cancelling, a feature completely absent here, but their sound signatures are often more processed and less natural. The JBL Endurance Race 2 has a much more durable, sport-focused build, which is the ZST's biggest weakness. You're trading build quality and features for pure, unadulterated audio performance at a rock-bottom price.

Value is where the KZ ZST goes from a good recommendation to a no-brainer. With a price range of $19 to $42 across vendors, you're getting sound quality that multiple owners compare to models costing three or four times as much. The budget score of 55.9 out of 100 doesn't fully capture the sheer bang-for-your-buck here, especially when the user sentiment score sits at a strong 80th percentile. If you're on a tight budget, this is the pair to beat.

The KZ ZST is a budget in-ear monitor that lands in the 88th percentile for sound quality in our database, which is frankly ridiculous for a pair of earphones that can be found for under $20. You're getting a hybrid dual-driver setup that delivers a fun, V-shaped sound with punchy bass and surprisingly clear highs. The social proof is through the roof too, sitting in the 96th percentile, meaning a ton of people have bought and loved these things.

Skip the KZ ZST if build quality and durability are your top priorities. The 35th percentile build score isn't just a number, it's a reflection of a cable and housing that multiple owners describe as cheap and flimsy. If you're rough on your gear, need a reliable pair for daily commuting where they'll get tossed in a bag, or absolutely require a great microphone for calls, you'll be frustrated. The call score is a dismal 25.4 out of 100, so look elsewhere if you're primarily taking calls.

The KZ ZST is a legend in the budget audio space for a reason. The sound quality is the absolute star of the show, performing far above its price point and making it a top pick for anyone who wants to hear what a good pair of earphones can do without spending a lot. Just know what you're getting into: the cable and mic housing feel cheap, and you'll need to make sure the connection is fully seated. If you can live with those quirks, this is some of the best sound money can buy for under $30.