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Cozoy D2 vs OPPO MH137: which should you buy?

Specs, scores and condensed review verdicts for the Cozoy D2 vs OPPO MH137, side by side. Where a product has no HearWiki score yet, not enough reviews have been aggregated to rate it.

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
  • OPPO MH137
HearWiki score
81
-
Sound
8.5
-
Value
9.0
-
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
  • MH1372024

Specifications

D2MH137
Type
Wired IEMs
Wired IEMs
Price (USD)
$55
$69
HearWiki score
81
Not scored
Released
2026
2024
Availability
Sold new
Discontinued
Driver
2DD
14.2 mm dynamic
Driver type
dynamic
dynamic
Driver configuration
2DD
-
Driver size
-
14.2 mm
Drivers per side
2
1
Frequency response
-
20 Hz - 20 kHz
Impedance
20 Ω
32 Ω
Sensitivity
-
106 dB/mW
Active noise cancelling
-
No
Controls
-
buttons
Voice assistant
-
Yes
Weight
-
15 g
USB-C
-
Yes
Connector
2-pin 0.78 mm
USB-C
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

OPPO MH137

The OPPO MH137 is a lightweight, semi-in-ear wired earphone that connects via USB-C for digital audio transmission. It features a single 14.2mm dynamic driver, an inline microphone, and button controls, making it a simple and affordable option for everyday listening without active noise cancellation.

  • Pro:Lightweight at only 15g for comfortable wear
  • Pro:Digital USB-C connection for clear signal transmission
  • Pro:Includes a microphone and button controls for calls and media
  • Con:No active noise cancellation, so external noise may intrude
  • Con:Semi-in-ear fit may not suit all ear shapes
  • Con:Single-driver design limits soundstage complexity

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 D2OPPO MH137