Short answer: the OnePlus Buds 4. It ranks #956 of 1291 in-ear headphones by sound quality, rated 3.2/5, at $114. The Kiwi Ears Quartet ranks #978, rated 3.1/5, at $109, $5 cheaper, a saving that is not big enough to make up the sound-quality gap.
Why pick the OnePlus Buds 4: True wireless buds with active noise cancelling, Bluetooth 5.4, LHDC alongside AAC and SBC, and IP55 resistance cover most commuter needs. The catch: The extra bass bleeds upward with midbass 2.8 dB and low mids 1.6 dB above target, so vocals can sound thick, and the air band jumps 5.9 dB with a 6.5 dB peak at 8.1 kHz, adding a tizzy edge to cymbals.
Why pick the Kiwi Ears Quartet: Bass is thick and punchy, sitting about 3.7 dB above target from 60 to 250 Hz with extension to 20 Hz, and tuning switches let you dial the low end up or down. The catch: The midbass lift makes some tracks sound boomy, presence dips about 4.3 dB with a 6.6 dB hole near 4.4 kHz, and a 6.3 dB treble peak near 8.2 kHz can sound splashy.
Buy the OnePlus Buds 4. It is rated higher for sound quality, and the $5 saving on the Kiwi Ears Quartet is not enough to make up the difference.
Still deciding? The full Headphones rankings cover every ranked option.
True wireless buds with active noise cancelling, Bluetooth 5.4, LHDC alongside AAC and SBC, and IP55 resistance cover most commuter needs.
Amazon $114.00 eBay
Bass is thick and punchy, sitting about 3.7 dB above target from 60 to 250 Hz with extension to 20 Hz, and tuning switches let you dial the low end up or down.
Amazon $109.00 eBayPrices on this page were last checked October 16, 2026 at 5:46 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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Specifications Side By Side
| OnePlus Buds 4 | Kiwi Ears Quartet | |
|---|---|---|
| Price | $114.00 | $109.00 |
| Ranked | #956 of 1291 in In-Ear Headphones | #978 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 64 (median of 2 squig.link measurements, calibrated to AutoEQ) | 62 (median of 29 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.50 dB standard deviation | 2.78 dB standard deviation |
| Tonal Tilt | -1.12 (negative is warmer, positive brighter) | -0.75 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+4.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.4 dB at 30 Hz) |
| Connection | True wireless | Wired |
| Active Noise Cancelling | Yes | - |
| Battery Life | 11 hours (45 with case, Manufacturer specified) | - |
| Bluetooth Version | 5.4 | - |
| Bluetooth Codecs | SBC, AAC, LHDC | - |
| Built-in Microphone | Yes | - |
| IP Rating | IP55 | - |
| Driver Type | - | Hybrid |
| Drivers | - | 2 x 10mm dynamic + 2 x balanced armature |
| Impedance | - | 32 ohms |
| Sensitivity | - | 110 dB/mW |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
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