Wired IEMs
Cozoy D2
81Outstanding
$55
Full review dataCozoy D2 vs Sennheiser CX 150BT: 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
Sennheiser CX 150BT
57Average
$76
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 6 measures.
- Cozoy D2
- Sennheiser CX 150BT
HearWiki score
81
57
Sound
8.5
6.6
Battery
-
7.0
Calls
-
6.6
Value
9.0
7.3
Price (USD)
$55
$76
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 6 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 6 years between them, that is a thin return - treat this as a restyle rather than a new platform.
- D220266 yr newer
- CX 150BT2020
Specifications
D2CX 150BT
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $55
- $76
- HearWiki score
- 81
- 57
- Released
- 2026
- 2020
- Availability
- Sold new
- Still sold new
- Driver
- 2DD
- 9.7 mm dynamic
- Driver type
- dynamic
- dynamic
- Driver configuration
- 2DD
- -
- Driver size
- -
- 9.7 mm
- Drivers per side
- 2
- 1
- Frequency response
- -
- 17 Hz - 20 kHz
- Impedance
- 20 Ω
- 28 Ω
- Sensitivity
- -
- 112 dB/mW
- Bluetooth
- -
- 5.0
- Codecs
- -
- SBC, AAC
- Multipoint pairing
- -
- Yes
- Battery life
- -
- 10 h
- Full charge time
- -
- 90 min
- Active noise cancelling
- -
- No
- Weight
- -
- 13 g
- Water resistance
- -
- none
- USB-C
- -
- Yes
- 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
Sennheiser CX 150BT
The Sennheiser CX 150BT offers a balanced, natural sound with clear vocals and tight bass, making it a solid choice for music and spoken-word content. Its 10-hour battery life, Bluetooth 5.0 with AAC support, and multipoint pairing provide reliable wireless convenience, though cable noise and build quality are notable drawbacks.
- Pro:Balanced, natural sound with clear vocals
- Pro:Good bass impact and depth for the price
- Pro:Reliable wireless stability with Bluetooth 5.0 and AAC
- Con:Cable noise is noticeable during use
- Con:Build quality feels less premium
- Con:Detail retrieval is somewhat limited
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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