True Wireless
KZ S2
58Average
$30
Full review dataKZ S2 vs Soundcore Space A40: which should you buy?
On aggregated review scores the Soundcore Space A40 comes out ahead with an HearWiki score of 78. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: Soundcore Space A40 - Great overall at around $41.
True Wireless
Soundcore Space A40
78Great
$41
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
KZ S2
Sound5.5
Battery3.0
Calls4.8
Value5.0
Soundcore Space A40
Sound7.5
Noise cancelling8.5
Battery7.0
Calls7.0
Value8.0
Specifications
| Spec | KZ S2 | Soundcore Space A40 |
|---|---|---|
| Type | True Wireless | True Wireless |
| Price (USD) | $30 | $41 |
| HearWiki score | 58 / 100 · Average | 78 / 100 · Great |
| Released | 2020 | 2022 |
| Audio | ||
| Driver | hybrid | dynamic |
| Driver size | 7 mm | 10 mm |
| Drivers per side | 2 | 2 |
| Frequency response | 20Hz-40000Hz | - |
| Impedance | 24 Ω | 16 Ω |
| Sensitivity | 98 dB/mW | - |
| Wireless | ||
| Bluetooth | 5.0 | 5.2 |
| Bluetooth version | 5.0 | 5.2 |
| Codecs | SBC, AAC | SBC, AAC, LDAC |
| Multipoint pairing | No | Yes |
| Wireless range | 20 m | 10 m |
| Battery | ||
| Battery life | 3 h | 10 h |
| Battery life (ANC on) | - | 8 h |
| Battery incl. case | 18 h | 50 h |
| Full charge time | 120 min | - |
| Quick charge | - | 10 min = 4 h |
| Wireless charging | No | Yes |
| Features | ||
| Active noise cancelling | No | Yes |
| ANC type | - | adaptive |
| Transparency mode | - | Yes |
| Custom EQ | - | Yes |
| Wear detection | - | No |
| Controls | - | touch |
| Design | ||
| Weight | - | 4.9 g |
| Case weight | - | 48.4 g |
| Water resistance | IPX5 | IPX4 |
| USB-C | Yes | Yes |
| Calls | ||
| Microphones | - | 6 |
What reviewers said
KZ S2
The KZ S2 are budget true wireless earbuds that offer a hybrid dual-driver setup, Bluetooth 5.0 with multipoint, and a lightweight, comfortable fit. While they deliver punchy bass and clear detail for the price, their short single-charge battery life, occasional treble harshness, and inconsistent wireless performance keep them from being a standout in their class.
- Pro:Very affordable
- Pro:Comfortable and lightweight fit
- Pro:Strong bass and clear detail
- Con:Short battery life per charge
- Con:Treble can be harsh or splashy
- Con:Connection stability issues reported
Soundcore Space A40
The Soundcore Space A40 earbuds deliver a well-rounded budget experience, combining effective adaptive noise cancellation, balanced audio, and long battery life with multipoint connectivity. They offer strong value at around $100, with a comfortable fit and support for LDAC, though a few ergonomic and performance quirks keep them from being flawless.
- Pro:Effective adaptive ANC for the price
- Pro:Balanced, pleasant sound with LDAC support
- Pro:Long battery life with wireless charging case
- Con:Microphone quality is mediocre
- Con:Touch controls can be inconsistent
- Con:Case hinge feels less sturdy
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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