How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a music-first in-ear monitor with a warm, bass-forward sound and a huge eartip kit to dial in the fit, choose BASN MMCX; if you need a brighter, more analytical hybrid with metal-and-resin build quality and a cable that can go Bluetooth later, choose CCA KZ ZS10.
• BASN MMCX — biggest strength: a 2DD+1BA triple-driver hybrid tuned for rich low end and vocal clarity, plus 12 pairs of eartips and two detachable MMCX cables in the box.
• BASN MMCX — biggest trade-off: 18 ohm impedance makes it easy to drive, but the plastic shell and minimalist look won't appeal to anyone who wants a jewelry-grade finish.
• CCA KZ ZS10 — biggest strength: a 4BA+1DD hybrid with a 20 Hz–40 kHz range, aluminum alloy faceplate and translucent resin cavity that hugs the ear.
• CCA KZ ZS10 — biggest trade-off: 29 ohm impedance and a 2-pin cable system mean it asks a bit more of your source and locks you into a different cable ecosystem.
• Choose BASN MMCX if you want maximum fit options and a sound that flatters bass-heavy and vocal music.
• Choose CCA KZ ZS10 if you want a brighter, more detailed listen and the option to convert to wireless down the road.
The BASN MMCX is built around a triple-driver hybrid setup: two dynamic drivers plus one balanced armature. In practice that combination is what gives it its character. The dynamic drivers handle the low end, and BASN explicitly tunes this model for a powerful bass burst while keeping highs delicate and mids full of vocals. If you listen to pop, symphony, chamber strings, or anything where you want the bottom end to feel present rather than polite, this is the tuning profile that suits you.
The fit story here is unusually generous. BASN ships 12 pairs of eartips in total — nine silicon and three memory foam — across different sizes, plus adjustable memory earhooks. That is a lot of material for getting a proper seal, and a proper seal is what makes the claimed noise isolation actually work. The nozzle is a rounded tip and the enclosure is plastic, which keeps the shell light in the ear. Two detachable MMCX cables are included, both 1.5 m, one with an inline remote and mic for volume control and one upgraded silver cable. A hard carrying case, a cleaning brush, a T-shirt clip and a 1/4 adapter round out the kit.
CCA KZ ZS10: Who It's For
The CCA KZ ZS10 (sold as the KZ ZS10 PRO X) is an upgraded take on a well-known platform, and the spec sheet shows where the effort went. It uses a 10 mm dynamic driver paired with four balanced armatures — two 300195 units and one 50024s — with the armatures specifically developed to improve high-frequency processing. The result the brand describes is a wider sound field and stronger analytical capability. Deep, solid bass, a smooth midrange and clear, bright highs is the intended signature.
The build is the other headline. The faceplate is aluminum alloy and the cavity is translucent resin, shaped to sit in the ear like a custom earbud. It's rated at just 0.06 kg, so despite the metal faceplate it stays light. The cable is a flat silver-plated design with 500D nylon added to each wire core, which the brand says reduces the stethoscope effect — that rustling noise you get when a cable rubs against your shirt. The 2-pin interface lets you swap or upgrade cables, and it can be paired with a Bluetooth cable to turn these into wireless earbuds, though that cable isn't included. Frequency range runs 20 Hz to 40 kHz, impedance is 29 ohm, and sensitivity is 112 dB.
Who should buy it: singers, bass players, guitarists, DJs and gamers who want detail and separation, and anyone who plans to go wireless later via a 2-pin Bluetooth cable. The noise control is listed as active noise cancellation with remote media controls. Who should skip it: listeners who want a thick, warm, bass-first tuning, or anyone who prefers the MMCX connector standard.
Side-by-Side: Which Should You Choose?
• Best for bass weight → BASN MMCX. Two dynamic drivers and a tuning explicitly aimed at a "bass burst" put it ahead for low-end presence.
• Best for detail and high-frequency extension → CCA KZ ZS10. Four balanced armatures and a 40 kHz top end are built for brightness and analysis.
• Best for build materials → CCA KZ ZS10. Aluminum alloy faceplate and translucent resin beat a plastic shell on paper.
• Best for easy driving from a phone → BASN MMCX. At 18 ohm it's the lower-impedance, more forgiving load.
• Best for going wireless later → CCA KZ ZS10. The 2-pin interface accepts a Bluetooth cable, whereas the BASN uses MMCX.
• Best for cable durability and quiet handling → CCA KZ ZS10. Nylon-reinforced cores are designed to cut cable noise.
• Best as an all-in-one gift or starter kit → BASN MMCX. Two cables, a hard case, a brush, a clip and an adapter ship together.
In my opinion, the CCA KZ ZS10 is the one I'd buy. The four-armature plus dynamic-driver setup, the 20 Hz–40 kHz range, the aluminum faceplate over a resin cavity, and the 2-pin cable that can become Bluetooth later make it the more versatile long-term pick for someone who wants detail now and wireless options down the road. The BASN MMCX is the better choice if your priority is warmth, bass, and a perfectly dialed fit out of the box — its eartip selection is genuinely hard to beat. But if I had to hand one pair to a friend and walk away, it would be the KZ ZS10.
how to fit in ear headphones
Start by choosing the eartip size that gives a light but complete seal — if you hear the bass thin out, the tip is too small. Insert with the nozzle angled slightly forward and up, then let the memory earhook or the cable settle behind your ear without pulling. With the BASN MMCX you have nine silicon and three foam pairs to test; foam usually seals best for noisy environments.
how to clean in ear headphones
Wipe the nozzle and eartips after every session, since earwax is what kills treble first. Pull the tips off and rinse them in lukewarm water, then let them dry fully before refitting. Use the cleaning brush included with the BASN MMCX to clear the mesh, and never push liquid down into the nozzle or the driver housing.
how to open in ear headphones
If you mean opening the retail box, both sets arrive ready to use — no assembly beyond attaching a cable and fitting tips. If you mean the shell itself, don't: neither the BASN MMCX nor the CCA KZ ZS10 is designed to be opened by the user, and prying the cavity apart will damage the drivers and void any coverage. To swap cables, unplug at the connector — MMCX on the BASN, 2-pin on the KZ ZS10.
how to ear headphones
Wear them with the cable routed over the top of your ear and down your back, which keeps the wire from snagging and reduces cable noise. Slide the T-shirt clip (included with the BASN MMCX) onto your collar to hold the cable steady. The CCA KZ ZS10's flat silver-plated cable is designed to reduce that rubbing noise further, so it's the calmer option when you're moving around.
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