How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-09-26 · 6 min read · Independent comparison
• BASN ASONE 14.2mm — biggest strength: a single 14.2mm planar magnetic driver (2-micron diaphragm, double-sided N52 magnet array) built for wide soundstage and low distortion, plus two detachable MMCX cables (single-crystal copper and an in-line mic cable).
• BASN ASONE 14.2mm — biggest trade-off: one driver means no tuning switch, so you get the planar house sound as-is, and 16 ohms is a low-impedance load that can hiss on noisy sources.
• KZ AS24 — biggest strength: a 24 balanced-armature array (31736 high, 29689 mid, 22955 low) with an 8-level tuning switch and DLP 3D-printed acoustic chambers, so you can reshape the sound yourself.
• KZ AS24 — biggest trade-off: 24 BAs and a tuning system add complexity, and 116 dB sensitivity makes it very easy to drive — sensitive to source noise and volume control discipline.
• Who each is for: BASN ASONE for listeners and musicians who want a warm, wide, plug-and-play planar experience; KZ AS24 for stage/studio users who want to dial in their own tuning.
The BASN ASONE is built around a 14.2mm planar magnetic driver. Planar designs are known for wide soundstage and low distortion, and the ASONE leans into that: a 2-micron diaphragm driven by a double-sided array of N52 magnets, with a 16-ohm impedance, 100 dB sensitivity, and a 20Hz–20,000Hz range. In practice that spec sheet points to a smooth, transparent presentation with deep bass and clear mids — the kind of tuning that flatters a wide range of genres rather than one.
What makes it stand out for everyday use is the cable situation. BASN ships two detachable MMCX cables: a high-purity single-crystal copper cable woven with a Litz shielding structure, and a second in-line mic cable with volume control. That means one set of earphones covers both critical listening and calls or casual use — you swap the cable, not the IEM. The kit is also unusually complete: silicone tips and memory foam tips in S/M/L, an aluminum storage box, a 1/4-inch adapter, a cable pull-out clamp, a mini cleaning brush, and a cable clip.
Buy the ASONE if you want a single, well-tuned planar IEM you can wear for long sessions and use for both music and voice. Skip it if you want to change the tuning yourself, or if you need something designed specifically for hands-on stage monitoring — there is no tuning switch here, and the sound is what it is.
The KZ AS24 Pro is the opposite philosophy: instead of one driver doing everything, it uses a matrix of 24 balanced-armature drivers split by role — 31736 drivers handling high and ultra-high frequencies, 29689 drivers for the mids, and a 22955 driver for the low end. The claim is full-spectrum coverage, and the numbers back up the "easy to drive" side: 19-ohm impedance, 116 dB sensitivity, 20Hz–20,000Hz.
The headline feature is the 8-level tuning switch. A built-in electronic filter lets you adjust the sound yourself, and KZ positions it as more precise than traditional damping-based tuning. For anyone mixing, tracking, or playing live, that flexibility is the point — you can nudge the response toward what the room or the track needs without buying a second pair. The housings are DLP 3D-printed to a 0.01mm tolerance, which lets KZ shape the internal acoustic chambers precisely, and the fit is described as ergonomic and secure based on ear-canal data.
Buy the AS24 if you want control over your tuning and a driver complement aimed at stage and studio work. Skip it if you prefer a set-and-forget IEM, or if you want the specific character of a planar driver — 24 balanced armatures simply sound like a different design.
• Best for wide soundstage and low distortion → BASN ASONE 14.2mm. Planar magnetic drivers are the reason to pick it.
• Best for user-adjustable tuning → KZ AS24. The 8-level switch is a feature the ASONE does not offer.
• Best for calls and casual listening → BASN ASONE 14.2mm. The included in-line mic cable with volume control makes it a two-in-one set.
• Best for stage and studio monitoring → KZ AS24. The driver array and tuning range are aimed squarely at that job.
• Best for easy driveability → KZ AS24. At 116 dB sensitivity it gets loud from almost any source.
• Best for source flexibility with low noise → BASN ASONE 14.2mm. At 100 dB it is less prone to hiss on imperfect outputs.
• Best for a complete out-of-the-box kit → BASN ASONE 14.2mm. Two cables, two tip types in three sizes, adapter, case, brush, and clip.
• Best for long-term serviceability → KZ AS24. KZ describes every part as replaceable rather than a throwaway design.
In my opinion, the BASN ASONE 14.2mm is the one I would buy if I wanted a single IEM to live with: the planar driver, the two included MMCX cables, and the full accessory kit make it the more versatile daily companion for music and calls alike. I would pick the KZ AS24 only if tuning control and a stage-oriented, high-sensitivity design matter more to me than plug-and-play simplicity. You genuinely cannot go wrong either way — it comes down to whether you want to shape the sound or just enjoy it.
FAQ
how to fit in ear headphones
how to clean in ear headphones
Wipe the tips and nozzles with a dry cloth after use, and remove tips periodically to clear any wax build-up. The BASN ASONE kit includes a mini cleaning brush, which is the right tool for the nozzle and mesh; never push moisture or sharp objects into the driver housing.
how to open in ear headphones
Neither the ASONE nor the AS24 is intended to be opened by the user — the drivers are sealed inside the housing. If a cable needs replacing, both use detachable MMCX-style connections, so you swap the cable rather than opening the shell; KZ also describes the AS24's parts as serviceable.
how to ear headphones
If you mean how to wear them, orient each earpiece so the cable runs down and forward, then seat it with a gentle twist until it feels stable. Both are wired 3.5mm in-ear designs with sound isolation, and a correct seal is what makes the isolation and bass response work as intended.
As an Amazon Associate I earn from qualifying purchases.
We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon and affiliated sites.
When you buy through links on this page, we may earn a commission from qualifying purchases at no extra cost to you.
Amazon and the Amazon logo are trademarks of Amazon or its affiliates. This site is an independent third-party review and is not affiliated with, endorsed by, or sponsored by Amazon or the product brands mentioned.
See also: Yamaha HPH-MT120BL vs beyerdynamic DT 770: Studio Monitor, Linsoul KZ ZS10 vs RK ROYAL KLUDGE HG101, SAMSUNG Galaxy Buds Fan vs YouthWhisper Open Ear Bone, Stouchi 2-in-1 vs HOOTEK USB C Headphones