Wired IEMs
Cozoy D2
81Outstanding
$55
Full review dataCozoy D2 vs Kefine Klean SV: which should you buy?
On aggregated review scores the Cozoy D2 comes out ahead with a HearWiki score of 81. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Cozoy D2 - Outstanding overall at around $55.
Wired IEMs
Kefine Klean SV
67Good
$54
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Cozoy D2 leads on 3 of 4 measures.
- Cozoy D2
- Kefine Klean SV
HearWiki score
81
67
Sound
8.5
6.7
Value
9.0
7.5
Price (USD)
$55
$54
Generation & platform
The scores rank quality. This is the other question: is the newer one actually newer technology, or the same platform in a new shell?
Same generation
Both shipped in 2026. These are the same generation of hardware - nothing in the radio, the codecs or the noise cancelling separates them. Nothing separates them on convenience features either, so the choice comes down to tuning and price.
- D22026
- Klean SV2026
Specifications
D2Klean SV
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $55
- $54
- HearWiki score
- 81
- 67
- Released
- 2026
- 2026
- Availability
- Sold new
- Sold new
- Driver
- 2DD
- 10 mm dynamic
- Driver type
- dynamic
- dynamic
- Driver configuration
- 2DD
- -
- Driver size
- -
- 10 mm
- Drivers per side
- 2
- -
- Impedance
- 20 Ω
- -
- Active noise cancelling
- -
- No
- Connector
- 2-pin 0.78 mm
- -
What reviewers said
Cozoy D2
The Cozoy D2 is a budget-friendly wired IEM that pairs a 6 mm beryllium driver with a 10 mm graphene-composite driver for a dual-dynamic setup. It offers a flexible connection via a 2-pin 0.78 mm cable that includes swappable 3.5 mm and 4.4 mm plugs, catering to both standard and balanced sources. With a 20-ohm impedance, it's easy to drive from most devices.
- Pro:Dual-driver hybrid design for detailed sound
- Pro:Interchangeable 3.5 mm and 4.4 mm plugs
- Pro:Low impedance (20 ohms) for easy pairing
- Con:No active noise cancellation
- Con:Wired only, limiting portability
- Con:Budget build may not suit all users
Kefine Klean SV
The Kefine Klean SV is a wired, single-dynamic IEM that presents a neutral, well-balanced sound signature with notable clarity for its modest price. Its all-metal build and refined tuning make it a thoughtful evolution of the original Klean, offering strong transparency and detail that belies its budget positioning.
- Pro:Refined, balanced tuning
- Pro:Solid all-metal construction
- Pro:Impressive clarity and detail for the price
- Con:No active noise cancellation
- Con:Wired-only design limits portability conveniences
- Con:Not a radical departure from its predecessor
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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