Short answer: the Hidizs MS2 Pro. It ranks #512 of 1291 in-ear headphones by sound quality, rated 3.9/5, at $83.99; the Kefine Delci AE ranks #552, rated 3.8/5, and costs $85.49, which makes this an easy call rather than a real tradeoff.
What the Hidizs MS2 Pro does well: The median of 7 hobbyist measurements gives it a solid Harman preference score of 72 with a 2.12 dB spread, and its mids sit within about 0.6 dB of target, so vocals and instruments sound natural. Watch for: A 7.7 dB peak near 8.2 kHz can make cymbals and sibilance sound sharp.
The case for the Kefine Delci AE: A special edition of the Kefine Delci with a DLC dynamic driver and interchangeable tuning nozzles. Watch for: A 1.94 dB spread from the target still leaves some peaks and dips.
Buy the Hidizs MS2 Pro. It is rated higher for sound quality than the Kefine Delci AE and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Headphones rankings.
The median of 7 hobbyist measurements gives it a solid Harman preference score of 72 with a 2.12 dB spread, and its mids sit within about 0.6 dB of target, so vocals and instruments sound natural.
Amazon $83.99 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
| Hidizs MS2 Pro | Kefine Delci AE | |
|---|---|---|
| Price | $83.99 | $85.49 |
| Ranked | #512 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 | 72 (median of 7 squig.link measurements, calibrated to AutoEQ) | 72 (median of 9 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.12 dB standard deviation | 1.94 dB standard deviation |
| Tonal Tilt | -0.38 (negative is warmer, positive brighter) | -0.66 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.6 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.1 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) | Dynamic |
| Drivers | 1 x 10.2mm dynamic + 1 x balanced armature | 1 x 10mm dynamic (DLC) |
| Impedance | 17 ohms | - |
| Sensitivity | 111 dB | - |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) | - |
| Built-in Microphone | No | - |
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 Hidizs MS2 Pro from audioamigo, digaoreviews, joycesreview, soundcheck39, soundignity, tdl and treblewellxtended; the Kefine Delci AE from audioamigo, gadgetrytech, practiphile, regancipher, sl0the, soundcheck39, superreview, tonedeafmonk and vortexreviews, all via squig.link.
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