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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
If you want a wired, low-impedance in-ear monitor that you can wear snug while you move — and yes, I'll say it plainly, even if you're hunting for a gaming headset for swimming — choose CCA ND Planet IEM; if you need wireless over-ear listening with active noise cancellation and long battery life for the office, commute or travel, choose YGVCDRY Metal.
• CCA ND Planet IEM — biggest strength: a 12mm beryllium-plated dynamic driver with a dual magnetic system and dual-cavity design, running 32 ohm at 112 dB sensitivity across an unusually wide 20Hz–40KHz range, wired through a detachable 2-pin cable.
• CCA ND Planet IEM — biggest trade-off: it's strictly a wired in-ear with no noise cancellation and no Bluetooth, so it's tethered to your source and the "Without Mic" style means no inline mic for calls.
• YGVCDRY Metal — biggest strength: Bluetooth 5.3 wireless freedom, hybrid active noise cancellation rated to cut ambient noise substantially, a transparency mode, and a rechargeable battery with fast charging.
• YGVCDRY Metal — biggest trade-off: the frequency response is listed as 20Hz–1200Hz and impedance is a low 16 ohm, so it's built for convenience and everyday listening rather than critical monitoring.
• Who each is for: the ND Planet suits listeners who want a wired, isolating in-ear for focused listening and movement; the YGVCDRY Metal suits anyone who wants untethered over-ear comfort with ANC.
The ND Planet is the "sit down and actually listen" option here. Its 12mm beryllium-plated driver is paired with a dual magnetic system and a dual-cavity acoustic chamber, a combination CCA says is aimed at cutting distortion and widening the soundstage. Whether or not you buy the marketing language, the spec sheet backs up the intent: 32 ohm impedance, 112 dB sensitivity, and a claimed 20Hz–40KHz frequency range. That's a wired, low-impedance, easy-to-drive design — the kind of thing that runs happily off a phone dongle or a cheap USB DAC without demanding a dedicated amplifier.
The build story matters too. The housing is high-transparency resin, the tips are soft silicone, and the whole thing weighs 65.5 g including cable. In-ear resin shells with silicone tips are the classic recipe for passive isolation — they block sound by sealing your ear canal, not by electronics. That's why this is the one I'd point to if you're the type of person searching for over ear headphones for swimming or a wireless headphones for swimming setup and slowly realizing that the seal, not the wireless chip, is what keeps water and noise out. It won't survive a lap pool, but for gym sessions, runs and sweaty commutes where a snug in-ear fit is the whole point, the ergonomic resin shell is the right shape.
Skip it if you need Bluetooth, active noise cancellation, a microphone, or a battery. This is a "Without Mic" wired in-ear with a 2.5mm jack listed in the specs and a detachable 2-pin cable — a repair-friendly, source-dependent tool, not a do-everything gadget.
The YGVCDRY Metal is the opposite philosophy: convenience first. It's an over-ear wireless headphone running Bluetooth 5.3 with a 10-metre range, hybrid active noise cancellation, and a one-key transparency mode for when you need to hear the world again. The 10mm dynamic driver handles the audio, and the whole package is aimed at commuters, office workers and travellers rather than studio engineers.
Comfort and battery are where it makes its case. The enclosure is ABS with PU padding, there's a PU head pad, and the frame is adjustable and retractable for different head shapes at roughly 190 g — light for an over-ear. Battery figures are quoted as 12 hours average playback, up to 30 hours total with the charging case, a 2-hour full charge, and fast charging that gives you a few hours of playback from a short top-up. Touch controls handle play/pause, volume and voice assistant, and game mode pushes latency down to around 60ms.
The trade-offs are real and worth naming. Impedance is 16 ohm and the listed frequency range is 20Hz–1200Hz — a narrow figure next to the ND Planet's 20Hz–40KHz, which tells you this is tuned for everyday listening rather than detail retrieval at the extremes. IPX5 sweat resistance and four sizes of silicone tips suggest it's fine for light exercise, but over-ear headphones for swimming is not what this is; IPX5 handles sweat and splashes, not submersion.
• Best for critical, wired listening → CCA ND Planet IEM. 32 ohm, 112 dB, 20Hz–40KHz, dual magnetic driver.
• Best for wireless freedom and travel → YGVCDRY Metal. Bluetooth 5.3, 10 m range, over-ear design.
• Best for blocking noise without electronics → CCA ND Planet IEM. Resin shells plus silicone tips seal your ear canal for passive isolation.
• Best for blocking noise with electronics → YGVCDRY Metal. Hybrid ANC with a transparency mode toggle.
• Best for long sessions away from a charger → YGVCDRY Metal. Rechargeable battery with fast charging.
• Best for movement and sweat → CCA ND Planet IEM for a secure in-ear seal; YGVCDRY Metal if you want over-ear with IPX5.
• Best for calls and voice → YGVCDRY Metal. Built-in mic and touch controls; the ND Planet's listed style is "Without Mic."
• Best for repairability → CCA ND Planet IEM. Detachable 2-pin cable means a dead cable isn't a dead earphone.
In my opinion, if your priority is sound quality per dollar of engineering — a wide frequency range, low distortion design and a genuinely isolating fit — I'd buy the CCA ND Planet IEM. It's the more specialised tool, and the 20Hz–40KHz range and dual magnetic driver are the specs I'd actually care about for focused listening. If instead you want one pair for the office, the commute and the gym without a cable in the way, I'd buy the YGVCDRY Metal for its ANC, Bluetooth 5.3 and battery life. And to close the loop on that swimming idea: neither is a pool headphone, but if you're chasing a snug, sealed fit for water-adjacent workouts, the wired in-ear is the closer match.
FAQ
do high impedance headphones sound better
Not automatically. Higher impedance mainly changes how much voltage a headphone needs from your source, so high-impedance models often want a dedicated amplifier. Both of these are low impedance — 32 ohm and 16 ohm — so they're easy to drive from ordinary devices.
is high impedance good for headphones
are high impedance headphones better
Not inherently. Impedance is a matching spec, not a quality score. What actually separates these two is design intent: the ND Planet is wired with a 20Hz–40KHz range, while the YGVCDRY Metal is wireless with ANC and a 20Hz–1200Hz range.
why are high impedance headphones better
They aren't universally better — the advantage shows up when a powerful amp is in the chain and the driver benefits from it. If you're plugging into a phone, a low-impedance set like the CCA ND Planet at 32 ohm or the YGVCDRY Metal at 16 ohm will simply get louder and cleaner without extra gear.
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