True Wireless
Nothing CMF Buds 2a
78Great
$42
Full review dataNothing CMF Buds 2a vs Tronsmart Onyx Pure: which should you buy?
On aggregated review scores the Nothing CMF Buds 2a comes out ahead with an HearWiki score of 78. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Nothing CMF Buds 2a - Great overall at around $42.
True Wireless
Tronsmart Onyx Pure
62Average
$25
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
Nothing CMF Buds 2a
Sound8.0
Noise cancelling7.5
Battery7.0
Calls6.5
Value9.0
Tronsmart Onyx Pure
Sound6.5
Battery5.0
Calls5.5
Value7.0
Specifications
| Spec | Nothing CMF Buds 2a | Tronsmart Onyx Pure |
|---|---|---|
| Type | True Wireless | True Wireless |
| Price (USD) | $42 | $25 |
| HearWiki score | 78 / 100 · Great | 62 / 100 · Average |
| Released | 2024 | 2022 |
| Audio | ||
| Driver | 12.4mm Bio-fibre | Dynamic Driver + Balanced Armature |
| Driver size | 12.4 mm | 10 mm |
| Drivers per side | 2 | 2 |
| Frequency response | 20Hz-20kHz | 20Hz-20kHz |
| Impedance | - | 32 Ω |
| Wireless | ||
| Bluetooth | 5.4 | 5.x |
| Bluetooth version | 5.4 | 5.3 |
| Codecs | AAC, SBC | AAC, SBC |
| Multipoint pairing | Yes | No |
| Latency | - | 30 ms |
| Wireless range | - | 10 m |
| Battery | ||
| Battery life | 8 h | 7 h |
| Battery life (ANC on) | 5 h | - |
| Battery incl. case | 35.5 h | 32 h |
| Full charge time | 89 min | 120 min |
| Quick charge | 10 min = 5.5 h | - |
| Wireless charging | No | No |
| Features | ||
| Active noise cancelling | Yes | No |
| ANC type | feedforward | none |
| Transparency mode | Yes | No |
| Companion app | Yes | No |
| Custom EQ | Yes | Yes |
| Wear detection | No | No |
| Controls | touch | touch |
| Voice assistant | Yes | - |
| Design | ||
| Weight | 4.28 g | 38 g |
| Case weight | 42.75 g | - |
| Water resistance | IP54 | IPX5 |
| USB-C | Yes | Yes |
| Model code | - | Tronsmart Onyx Pure |
| Calls | ||
| Microphones | 4 | 2 |
What reviewers said
Nothing CMF Buds 2a
The Nothing CMF Buds 2a deliver a compelling mix of solid audio performance, adaptive noise cancellation, and long battery life at a very accessible price point. They are a practical pick for budget-conscious listeners who want reliable everyday earbuds with app-based customization, though they come with some expected trade-offs in materials and features.
- Pro:Strong value for the price
- Pro:Adaptive ANC with 42 dB reduction
- Pro:Good battery life with case
- Con:Plasticky build quality
- Con:No in-ear detection
- Con:Limited codec support (AAC, SBC)
Tronsmart Onyx Pure
The Tronsmart Onyx Pure delivers a lively and energetic sound signature at a very wallet-friendly price point, making it a strong contender in the budget TWS arena. It pairs a dynamic driver with a balanced armature for hybrid output, offers touch controls, and provides a solid 32 hours of total playback with its case. While it lacks features like active noise cancellation and multipoint connectivity, its punchy audio and low latency make it a worthwhile pick for casual listeners on a tight budget.
- Pro:Energetic, engaging sound with hybrid dual drivers
- Pro:Excellent value for the sub-$30 price range
- Pro:Decent 5-hour battery life per charge, 32 hours with the case
- Con:No active noise cancellation or transparency mode
- Con:No multipoint pairing for switching between devices
- Con:Lacks companion app support for further tuning
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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