Wired IEMs
Cozoy D2
81Outstanding
$55
Full review dataCozoy D2 vs KZ ZSA: 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 ZSA
39Weak
$48
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 ZSA
HearWiki score
81
39
Sound
8.5
5.1
Value
9.0
-
Price (USD)
$55
$48
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 7 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. For 7 years between them, that is a thin return - treat this as a restyle rather than a new platform.
- D220267 yr newer
- ZSA2019
Specifications
D2ZSA
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $55
- $48
- HearWiki score
- 81
- 39
- Released
- 2026
- 2019
- Availability
- Sold new
- Discontinued
- Driver
- 2DD
- 1DD + 1BA hybrid
- Driver type
- dynamic
- hybrid
- Driver configuration
- 2DD
- 1DD + 1BA
- Driver size
- -
- 8 mm
- Drivers per side
- 2
- 2
- Frequency response
- -
- 7 Hz - 40 kHz
- Impedance
- 20 Ω
- 18 Ω
- Sensitivity
- -
- 101 dB/mW
- Active noise cancelling
- -
- No
- Weight
- -
- 19 g
- Detachable cable
- -
- Yes
- USB-C
- -
- No
- Connector
- 2-pin 0.78 mm
- -
- Microphones
- -
- 1
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 ZSA
The KZ ZSA is a budget-friendly hybrid IEM with a warm, energetic sound, highlighted by deep bass and crisp, detailed treble. Its sturdy metal build and detachable cable add value, though the forward treble and sometimes heavy bass may not suit all listeners. Fit can be inconsistent depending on ear shape.
- Pro:Sturdy metal construction
- Pro:Deep, impactful bass
- Pro:Clear mids and detailed highs
- Con:Bass can be overpowering for some
- Con:Treble may come across as sharp
- Con:Fit issues reported by certain users
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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