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Cozoy D2 vs HiFiMAN ES100: 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.

Score 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
  • HiFiMAN ES100
HearWiki score
81
50
Sound
8.5
5.9
Value
9.0
4.8
Price (USD)
$55
$69

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
  • ES1002024

Specifications

D2ES100
Type
Wired IEMs
Wired IEMs
Price (USD)
$55
$69
HearWiki score
81
50
Released
2026
2024
Availability
Sold new
Discontinued
Driver
2DD
15 mm dynamic
Driver type
dynamic
dynamic
Driver configuration
2DD
-
Driver size
-
15 mm
Drivers per side
2
-
Frequency response
-
15 Hz - 20 kHz
Impedance
20 Ω
150 Ω
Sensitivity
-
113 dB/mW
Active noise cancelling
-
No
Weight
-
13 g
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

HiFiMAN ES100

The HiFiMAN ES100 is a wired in-ear monitor featuring a 15mm dynamic driver in a lightweight 13g housing, aiming for detailed, spacious sound with high sensitivity for easy pairing with phones and portable players. Its 150-ohm impedance and balanced tuning deliver clear highs and mids, though bass response is more restrained than emphasized. The package includes a carry pouch and spare silicone tips for convenience.

  • Pro:Lightweight and comfortable at 13g
  • Pro:High sensitivity (113 dB) for easy driving
  • Pro:Clear, well-balanced mids and highs
  • Con:Bass lacks deep low-end emphasis
  • Con:150-ohm impedance may require more power from weak sources
  • Con:Wired only with 3.5mm connector, no ANC or USB-C

Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.

Compare something else

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New comparisonCozoy D2HiFiMAN ES100