Wired IEMs
Cozoy D2
81Outstanding
$55
Full review dataCozoy D2 vs KZ ZS12 Pro X: 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
KZ ZS12 Pro X
76Great
$58
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Cozoy D2 leads on 4 of 4 measures.
- Cozoy D2
- KZ ZS12 Pro X
HearWiki score
81
76
Sound
8.5
7.7
Value
9.0
8.2
Price (USD)
$55
$58
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
The Cozoy D2 is 2 years newer, but it is 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.
- D220262 yr newer
- ZS12 Pro X2024
Specifications
D2ZS12 Pro X
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $55
- $58
- HearWiki score
- 81
- 76
- Released
- 2026
- 2024
- Availability
- Sold new
- Still sold new
- Driver
- 2DD
- 1DD + 5BA hybrid
- Driver type
- dynamic
- hybrid
- Driver configuration
- 2DD
- 1DD + 5BA
- Driver size
- -
- 10 mm
- Drivers per side
- 2
- 6
- Frequency response
- -
- 20 Hz - 40 kHz
- Impedance
- 20 Ω
- 25 Ω
- Sensitivity
- -
- 106 dB/mW
- Active noise cancelling
- -
- No
- Controls
- -
- buttons
- USB-C
- -
- 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
KZ ZS12 Pro X
The KZ ZS12 Pro X is a wired hybrid in-ear monitor combining one dynamic driver with five balanced armatures for a lively, energetic sound signature. It delivers punchy bass, clear mids, and detailed highs while remaining easy to drive, and its four dip-switches allow users to tweak the tuning to their preference.
- Pro:Punchy, engaging bass response
- Pro:Easy to drive with most sources
- Pro:Adjustable tuning via four dip-switches
- Con:V-shaped tuning may not suit neutral listeners
- Con:Build quality feels typical for the price
- Con:Not a class leader in overall technical performance
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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