Over-Ear
Harmonicdyne Poseidon
76Great
$120
Full review dataHarmonicdyne Poseidon vs Nothing CMF Headphone Pro: which should you buy?
On aggregated review scores the Nothing CMF Headphone Pro comes out ahead with an HearWiki score of 84. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Nothing CMF Headphone Pro - Great overall at around $140.
Over-Ear
Nothing CMF Headphone Pro
84Great
$140
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Harmonicdyne Poseidon
Sound7.5
Value7.8
Nothing CMF Headphone Pro
Sound8.0
Noise cancelling8.5
Battery9.5
Calls7.5
Value9.0
Specifications
| Spec | Harmonicdyne Poseidon | Nothing CMF Headphone Pro |
|---|---|---|
| Type | Over-Ear | Over-Ear |
| Price (USD) | $120 | $140 |
| HearWiki score | 76 / 100 · Great | 84 / 100 · Great |
| Released | 2021 | 2025 |
| Audio | ||
| Driver | dynamic | 40mm custom nickel-plated dynamic drivers |
| Driver size | 50 mm | 40 mm |
| Drivers per side | 2 | 2 |
| Frequency response | 10Hz-40kHz | 20Hz-20kHz |
| Impedance | 64 Ω | 16 Ω |
| Sensitivity | 103 dB/mW | - |
| Wireless | ||
| Bluetooth | - | 5.4 |
| Bluetooth version | - | 5.4 |
| Codecs | - | AAC, SBC, LDAC |
| Multipoint pairing | - | Yes |
| Latency | - | 120 ms |
| Wireless range | - | 10 m |
| Battery | ||
| Battery life | - | 100 h |
| Battery life (ANC on) | - | 50 h |
| Full charge time | - | 120 min |
| Quick charge | - | 5 min = 8 h |
| Wireless charging | - | No |
| Features | ||
| Active noise cancelling | - | Yes |
| ANC type | - | hybrid |
| Transparency mode | - | Yes |
| Companion app | - | Yes |
| Custom EQ | - | Yes |
| Wear detection | - | Yes |
| Controls | - | both |
| Design | ||
| Weight | 380 g | 283 g |
| Water resistance | - | IPX2 |
| Foldable | - | No |
| Detachable cable | Yes | Yes |
| USB-C | No | Yes |
| Balanced connection | Yes | - |
| Calls | ||
| Microphones | - | 5 |
| Call noise reduction | - | 3-mic ENC architecture |
What reviewers said
Harmonicdyne Poseidon
The Harmonicdyne Poseidon is a wired, open-back over-ear headphone featuring a 50mm nickel-coated dynamic driver, designed for clear, low-distortion sound. With a 64-ohm impedance and 103 dB sensitivity, it can be driven by portable gear, though its open-back nature means it leaks audio. Build quality, comfort, and a generous accessory set—including balanced and single-ended cables—are highlights, making it a strong value in its price bracket.
- Pro:Excellent build and premium materials
- Pro:Comfortable for long listening sessions
- Pro:Includes both balanced and single-ended cables
- Con:Open-back design leaks sound significantly
- Con:Requires a quiet listening environment
- Con:Tuning may not suit all musical tastes
Nothing CMF Headphone Pro
The CMF Headphone Pro from Nothing is a budget-friendly over-ear wireless headphone that punches well above its price point, offering a robust feature set including hybrid ANC, LDAC support, multipoint Bluetooth, and an impressive 100-hour battery life with ANC off. Its sound is lively and well-tuned for the price, while the build and controls feel solid for the cost, though some compromises exist in water resistance and EQ customization. Overall, it's a standout value pick for anyone seeking long battery life and capable noise cancellation without spending a fortune.
- Pro:Exceptional battery life of up to 100 hours
- Pro:Effective hybrid ANC for the price
- Pro:Supports high-quality LDAC codec
- Con:Basic IPX2 water resistance only
- Con:EQ customization is limited
- Con:Not foldable for easy portability
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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