How We Research
We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a balanced, studio-tuned sound with a beryllium driver's speed and a cable you can swap out over time, choose HIFIXAUDIO Kiwi Ears Cadenza; if you need a lightweight, low-impedance IEM built for gaming and long sessions with an inline mic on the cable, choose TANGZU Wan'er S.G II.
• Kiwi Ears Cadenza — biggest strength: a 10mm beryllium dynamic driver tuned for a balanced signature, with bass that decays fast enough to keep the mids clean and natural.
• Kiwi Ears Cadenza — biggest trade-off: it's a wired, 3.5mm-only IEM with no inline mic mentioned, so it's not built for calls or voice chat out of the box.
• TANGZU Wan'er S.G II — biggest strength: a refined 10mm PET diaphragm driver with low 19Ω impedance, making it easy to drive from phones, handhelds and consoles.
• TANGZU Wan'er S.G II — biggest trade-off: it's aimed at clarity and tonality rather than the punchy, high-tensile bass character a beryllium diaphragm is known for.
• Who each is for: pick the Cadenza if you want a music-first, audiophile-leaning listen; pick the Wan'er S.G II if you want a gaming-friendly, low-impedance all-rounder with a mic option.
The Cadenza's headline is its driver material. Beryllium has the highest tensile strength and surface tension of the materials used in audio diaphragms, and that's the whole point of the 10mm unit inside this shell. In practice, that means a diaphragm that's stiff and light, which moves fast and stops fast. Fast decay is what keeps bass from bleeding into the mids, and it's the reason a beryllium design can sound powerful without sounding thick. Kiwi Ears leans into that here: the Cadenza is tuned as a balanced signature with bass that keeps the character but tightens up, mids that stay natural, and a treble curve that follows the Harman reference — detailed and airy, but described as non-fatiguing rather than sharp.
The housing is a custom 3D-printed cavity specifically engineered around that 10mm driver, which is a meaningful design choice — the acoustic chamber is matched to the driver rather than being a generic shell. Connectivity is a detachable 2-pin system, and the included cable is a 4-core braided copper run with a 3.5mm single-ended termination. The detachable design matters for longevity: if a cable fails or you simply want to try something different later, you replace the cable, not the earphones. Impedance is 32Ω with 110dB sensitivity and a 20Hz–20kHz range, and the earpieces use a bud-style in-ear fit with passive noise cancellation. There's a 1-year warranty and a remote on the cable.
Who should buy it: listeners who care most about music — metal, pop, jazz, R&B, dubstep are all in its wheelhouse per the design brief — and who want a balanced, detail-forward signature they can cable-roll over time.
Who should skip it: anyone who needs an inline microphone for calls or in-game voice chat, and anyone who wants the absolute easiest-to-drive load. At 32Ω it's still phone-friendly, but it asks a little more of a weak source than a 19Ω set does.
The Wan'er S.G II is the second generation of a well-known budget IEM line, and the changes are mostly structural. The 10mm PET diaphragm and the driver chamber around it were both refined this time, with the goal being clarity, natural tonality and reduced distortion. PET is also hypoallergenic, which is a small but real comfort point if silicone or metal shells tend to bother your ears over long sessions.
Where this set really differentiates itself is driveability and fit. Impedance is just 19Ω with 113.5dB sensitivity, which means it plays loud and clean off almost anything — a phone, a PC, a gaming console, a Hi-Res player, even a high-current headphone amp. The housing was reshaped through ergonomic study and user feedback, so the contours are meant to sit securely and stay comfortable for hours. The nozzle end uses TANGZU's patented Tang Sancai eartips with an internal filter zone, which the brand says optimizes the sound path and cuts distortion versus plain silicone tips.
The connector is a 0.78mm flat 2-pin, and the stock cable is silver-plated copper — again detachable, so it's replaceable and upgradeable. The version in this data sheet is the white model with a 3.5mm jack and a mic, plus button media controls. Enclosure materials are metal, plastic and silicone, and the whole package is listed at 200g.
Who should buy it: gamers, commuters and anyone who wants one wired IEM that works with everything they own — including voice chat and calls — without fussing over source gear.
Who should skip it: listeners chasing the specific speed and bass character of a beryllium diaphragm, or anyone who prefers a Harman-style treble curve as their reference point.
Side-by-Side: Which Should You Choose?
• Best for bass character and speed → HIFIXAUDIO Kiwi Ears Cadenza. Beryllium's stiffness is the reason its bass hits hard but decays quickly, keeping mids clean.
• Best for easy driveability → TANGZU Wan'er S.G II. At 19Ω and 113.5dB, it's the friendlier load for weak phone outputs and handhelds.
• Best for cable upgrades and long-term ownership → a tie. Both use detachable 2-pin connectors, though the Cadenza uses standard 2-pin while the Wan'er S.G II uses 0.78mm flat 2-pin — check compatibility before buying a replacement cable.
• Best for a balanced, Harman-referenced tuning → HIFIXAUDIO Kiwi Ears Cadenza. Its treble follows the Harman curve with an airy, non-fatiguing presentation.
• Best for long-session comfort → TANGZU Wan'er S.G II. The ergonomic redesign and hypoallergenic PET material are aimed squarely at extended wear.
• Best for tangle resistance → TANGZU Wan'er S.G II. Its cable is explicitly described as tangle-free, with silver-plated copper conductors.
• Best for a custom-fitted acoustic chamber → HIFIXAUDIO Kiwi Ears Cadenza. Its 3D-printed housing was engineered specifically around the 10mm driver.
In my opinion, if you're buying one wired IEM mainly to listen to music and you want the most technically interesting driver of the two, I'd take the HIFIXAUDIO Kiwi Ears Cadenza. The beryllium diaphragm, the driver-matched 3D-printed cavity and the balanced Harman-leaning tuning give it a clear identity, and the standard 2-pin system keeps it serviceable for years. That said, if your priority is a single pair that handles gaming, calls and every device in your house without strain, I'd point you to the TANGZU Wan'er S.G II — the 19Ω load and mic-equipped cable are exactly what that job needs. Two different briefs, two honest answers.
Not universally — it depends on your priority. The Cadenza's beryllium driver and Harman-referenced tuning suit music listening, while the Wan'er S.G II's 19Ω impedance and mic cable suit gaming and everyday device-hopping. Neither is objectively "better."
The TANGZU Wan'er S.G II, on paper. Its 19Ω impedance and 113.5dB sensitivity mean it needs less power than the Cadenza's 32Ω / 110dB combination, so it should reach a comfortable volume more easily from a weak headphone jack.
Yes, but they're not the same standard. The Cadenza uses a detachable 2-pin connector with a 4-core braided copper cable, and the Wan'er S.G II uses a 0.78mm flat 2-pin with silver-plated copper. Match the exact connector type when buying a replacement.
The TANGZU Wan'er S.G II, in my view. It's positioned as a gaming IEM, uses a low-impedance design that pairs with consoles and PCs, and this version ships with an inline mic and media controls — features the Cadenza's listing doesn't include.
Both sit in the budget wired-IEM space, and pricing shifts over time, so check the current price on Amazon before deciding. Compare what you actually need — mic and easy driveability versus driver material and tuning style — rather than assuming one is cheaper.
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.