Short answer: the DUNU Titan S. It ranks #468 of 1291 in-ear headphones by sound quality, rated 3.9/5, at $88.99; the Kefine Delci AE ranks #552, rated 3.8/5, at $85.49. The price gap is small enough that the sound-quality ranking should decide it.
The case for the DUNU Titan S: Crinacle’s measurement gives it a preference score of 73, and across 34 hobbyist measurements on squig.link the bass, low mids and upper mids all land within half a decibel of the Harman target. The tradeoff: Hobbyist measurements put sub-bass about 3.2 dB below target, so the deepest synth and cinematic bass hits carry less rumble than the Harman curve calls for.
The case for the Kefine Delci AE: A special edition of the Kefine Delci with a DLC dynamic driver and interchangeable tuning nozzles. The catch: A 1.94 dB spread from the target still leaves some peaks and dips.
Buy the DUNU Titan S. It is rated higher for sound quality, and the $3.50 you would save on the Kefine Delci AE does not close the gap.
Looking for alternatives? See the complete Headphones rankings.
Crinacle’s measurement gives it a preference score of 73, and across 34 hobbyist measurements on squig.link the bass, low mids and upper mids all land within half a decibel of the Harman target.
AliExpress $88.99 eBay
A special edition of the Kefine Delci with a DLC dynamic driver and interchangeable tuning nozzles.
Amazon $85.49 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
| DUNU Titan S | Kefine Delci AE | |
|---|---|---|
| Price | $88.99 | $85.49 |
| Ranked | #468 of 1291 in In-Ear Headphones | #552 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 73 (measured by crinacle, via AutoEQ) | 72 (median of 9 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.29 dB standard deviation | 1.94 dB standard deviation |
| Tonal Tilt | +0.29 (negative is warmer, positive brighter) | -0.66 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Dynamic |
| Drivers | 1 x 11mm dynamic | 1 x 10mm dynamic (DLC) |
| Impedance | 32 ohms | - |
| Sensitivity | 110 dB | - |
| Frequency Response | 5Hz - 40kHz (Manufacturer specified) | - |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.1 dB at 30 Hz) |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the DUNU Titan S from achoreviews, aden, aftersound, ankramutt, arc, arn, atechreviews, bassaudio, bedrock, boizoff, bryaudioreviews, cqtek, dentreviews, ekaudio, harutohiroki, hbb, ianfann, iemworld, musicafe, nymz, practiphile, precog, pw, ragnarok, recode, rg, soundignity, superreview, suporsalad, tedthepraimortis, therollo9, timmyv, vortexreviews and vsg; the Kefine Delci AE from audioamigo, gadgetrytech, practiphile, regancipher, sl0the, soundcheck39, superreview, tonedeafmonk and vortexreviews, all via squig.link.
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