Wired IEMs
Cozoy D2
81Outstanding
$55
Full review dataCozoy D2 vs KZ ZA12: 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 ZA12
69Good
$47
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
- KZ ZA12
HearWiki score
81
69
Sound
8.5
6.8
Value
9.0
7.9
Price (USD)
$55
$47
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
- ZA122024
Specifications
D2ZA12
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $55
- $47
- HearWiki score
- 81
- 69
- Released
- 2026
- 2024
- Availability
- Sold new
- Still sold new
- Driver
- 2DD
- 2DD + 4BA hybrid
- Driver type
- dynamic
- hybrid
- Driver configuration
- 2DD
- 2DD + 4BA
- Driver size
- -
- 10 mm
- Drivers per side
- 2
- 6
- Frequency response
- -
- 20 Hz - 40 kHz
- Impedance
- 20 Ω
- 45 Ω
- Sensitivity
- -
- 103 dB/mW
- Active noise cancelling
- -
- No
- Controls
- -
- both
- Detachable cable
- -
- Yes
- USB-C
- -
- No
- Connector
- 2-pin 0.78 mm
- 3.5 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 ZA12
The KZ ZA12 is a wired hybrid IEM that pairs dual dynamic drivers with four balanced armatures for a clear, analytical sound signature. It offers good detail retrieval and a neutral-leaning tuning, making it a solid budget pick, though its bass output is modest and the treble can occasionally sound sharp. The detachable cable and standard 3.5mm connection add convenience for everyday use.
- Pro:Clear and natural midrange
- Pro:Good detail retrieval for the price
- Pro:Detachable 3.5mm cable
- Con:Limited sub-bass presence
- Con:Treble can be peaky or sibilant
- Con:Sensitive to source impedance
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
Compare something else
Swap either side out, or start again from the picker.