How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a featherweight, low-distortion wired IEM that disappears in your ears and plays clean across the whole frequency range, choose TANCHJIM Bunny; if you need a warm, sub-bass-heavy in-ear with a metal faceplate, a DLC driver and a cable choice of 3.5mm or USB-C, choose Linsoul Kiwi Ears x.
• TANCHJIM Bunny — biggest strength: A dual-chamber dynamic driver rated at under 0.05% harmonic distortion at 94dB, paired with a 3.5g-per-side build and a wide 8Hz–48kHz frequency range. In my opinion that distortion figure is the headline here — it points to a clean, controlled midrange and bass rather than a coloured one.
• TANCHJIM Bunny — biggest trade-off: Wired only, with a 3.5mm jack and no active noise cancellation. There's no USB-C option and no app-based tweaking on this version, so you're locked to whatever the tuning gives you.
• Linsoul Kiwi Ears x — biggest strength: A 10mm Diamond-Like Carbon diaphragm tuned for a warm, engaging signature with roughly 10dB of sub-bass impact, plus a CNC metal faceplate and a choice of 3.5mm or USB-C cable.
• Linsoul Kiwi Ears x — biggest trade-off: Its 20Hz–20kHz range is narrower on paper than the Bunny's, and at 32 ohm it asks a touch more of a weak source. The tuning is deliberately coloured, which is a plus if you want warmth and a minus if you want neutrality.
• Who each pick is for: Bunny → listeners who want light, neutral-ish, low-distortion sound for long sessions. Kiwi Ears x → listeners who want bass weight, durability and connection flexibility.
The Bunny is built around one idea: squeeze distortion out of a single dynamic driver. TANCHJIM rates it at less than 0.05% harmonic distortion at 94dB, and that number is what shapes everything else. When a driver keeps distortion that low, the midrange and bass stop smearing into each other — vocals stay separated from low-end instruments instead of thickening into one blob. The dual-chamber layout and the acoustic maze cavity are the mechanical means to that end, deepening low frequencies without letting them bleed upward. There's also a patented smooth inner cavity wall that the brand says reduces high-frequency damping and controls dispersion, which is the kind of detail that usually shows up as cleaner treble extension rather than a dramatic tonal shift.
Buy the Bunny if you want a near-weightless wired IEM for long listening sessions, gaming, or casual monitoring where clarity and low distortion matter more than thump. Skip it if you need USB-C, active noise cancellation, or a tuning you can adjust — this version gives you a fixed, balanced presentation and a 3.5mm plug, nothing more.
Linsoul Kiwi Ears x: Who It's For
This one is a collaboration between Kiwi Ears and B_Media (Axel Bostrom), an audio reviewer with a substantial following known for blunt, real-world-oriented critique. That framing tells you the target: a budget IEM tuned by someone who listens for enjoyment rather than measurement graphs alone. The driver is a 10mm Diamond-Like Carbon diaphragm — a material that's been used in IEMs for over a decade and is valued for rigidity and tension, which translates to fast transient response. Kiwi Ears rates it at under 0.1% THD at 1kHz.
The tuning is the personality here. Kiwi Ears describes a warm, balanced tone with roughly 10dB of sub-bass impact, explicitly compared to the feel of a subwoofer. The mids are described as lush and velvety, with a 3kHz pinna peak that follows the shape of the human ear, and the treble uses a slow decay to pull out microdetails. Read that together and you get an IEM that leans full and musical rather than clinical — the low end has real presence, the midrange is smooth rather than sharp, and the top end lingers a little longer than a strictly neutral set would.
Build-wise, the faceplate is CNC metal with a commemorative Kiwi Ears x B_Media logo, which should hold up better than plastic against keys and pocket wear. Sensitivity is 103dB, impedance is 32 ohm, and the frequency range is 20Hz–20kHz. You get a choice of 3.5mm or USB-C cable, and each unit ships with a two-core silver-plated cable intended to preserve high-frequency detail while keeping the natural warmth. Passive noise cancellation comes from the seal, not electronics. One-year warranty.
Buy the Kiwi Ears x if you want a warm, bass-forward IEM with a metal faceplate, a replaceable silver-plated cable, and the flexibility of USB-C or 3.5mm. Skip it if you want the flattest possible response, the lightest possible shell, or you're chasing the lowest distortion spec of the two.
• Best for lowest distortion → TANCHJIM Bunny. Under 0.05% at 94dB versus under 0.1% at 1kHz on the Kiwi Ears x. Different test conditions, but the Bunny is the cleaner-leaning design on paper.
• Best for bass weight → Linsoul Kiwi Ears x. Its ~10dB sub-bass shelf is a deliberate, physical-feeling low end. The Bunny deepens bass through its maze cavity, but it's tuned balanced rather than boosted.
• Best for long-session comfort → TANCHJIM Bunny. 3.5g per earbud in a transparent PC shell is about as light as wired IEMs get. The Kiwi Ears x carries a metal faceplate, which adds mass and durability in the same move.
• Best for connection flexibility → Linsoul Kiwi Ears x. 3.5mm or USB-C at purchase. The Bunny here is 3.5mm only with a mic.
• Best for wide frequency coverage → TANCHJIM Bunny. 8Hz–48kHz is a much wider stated range than the Kiwi Ears x's 20Hz–20kHz.
• Best for on-call use → TANCHJIM Bunny. The 3.5mm-with-mic version includes a microphone; this Kiwi Ears x configuration is listed without one.
• Best for durability and looks → Linsoul Kiwi Ears x. CNC metal faceplate with a collaboration logo, plus a silver-plated two-core cable you can swap.
• Best for driveability from a phone or laptop → TANCHJIM Bunny, narrowly. 30 ohm and 30 dB-class sensitivity versus 32 ohm and 103dB — both are easy loads, but the Bunny asks marginally less of a weak output.
My Verdict
The Bunny's low distortion and controlled midrange suit positional cues, and its light shell helps during long sessions. The Kiwi Ears x has a faster DLC driver and stronger sub-bass, which many gamers prefer for immersion. Both are wired, so latency isn't an issue either way.
This configuration is listed without one — it's the 3.5mm, no-mic version. If you need calls or chat, the TANCHJIM Bunny's 3.5mm-with-mic model includes a microphone.
On paper, the Bunny. At 3.5g per earbud in a transparent PC shell it's noticeably lighter than a set with a CNC metal faceplate, and lighter shells usually mean less pressure over time.
It depends what you mean by better. The Kiwi Ears x has a deliberately boosted ~10dB sub-bass for a warm, subwoofer-like feel. The Bunny aims for depth and control through its acoustic maze cavity rather than a boost, so it sounds tighter but less full.
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