Short answer: the HIFIMAN RE400, though neither ranks well in its class. It ranks #1015 of 1291 in-ear headphones by sound quality, rated 2.9/5, at $19.99; the NiceHCK DB2 ranks #1061, rated 2.7/5, and costs $22.99, so there is not much of a tradeoff to weigh. Both are rated below 3.0/5 among the 1291 in-ear headphones; for better sound, the EPZ G10 ranks #16 at $23.74.
Why pick the HIFIMAN RE400: A very low price makes it an easy spare pair or first wired earphone. The catch: Across hobbyist measurements on squig.link sub-bass sits 7.5 dB below target and falls 6 dB short by 53 Hz, while presence drops 5.8 dB and a 9.4 dB dip near 11.9 kHz dulls the top end, so music sounds lean down low and muted up high.
The case for the NiceHCK DB2: Bass is lifted about 2.9 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. Watch for: Presence sits about 4.5 dB low with a 10.3 dB dip near 4.6 kHz, so vocals and instruments lose some bite.
Buy the HIFIMAN RE400. It is rated higher for sound quality than the NiceHCK DB2 and costs less, so only choose the other one for a particular feature it does better.
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A very low price makes it an easy spare pair or first wired earphone.
Amazon $19.99 eBay
Bass is lifted about 2.9 dB with extension to 20 Hz, giving kick drums and bass lines extra weight.
NiceHCK $22.99 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
| HIFIMAN RE400 | NiceHCK DB2 | |
|---|---|---|
| Price | $19.99 | $22.99 |
| Ranked | #1015 of 1291 in In-Ear Headphones | #1061 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 60 (measured by crinacle, via AutoEQ) | 58 (median of 13 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 3.29 dB standard deviation | 3.13 dB standard deviation |
| Tonal Tilt | +0.63 (negative is warmer, positive brighter) | -0.75 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid |
| Drivers | 1 x 8.5mm dynamic | 1 x 10mm dynamic + 1 x balanced armature |
| Impedance | 32 ohms | 16 ohms |
| Sensitivity | 102 dB/mW | 107 dB/mW |
| Built-in Microphone | No | - |
| Back | Closed | Closed |
| Sub-bass Extension | Falls 6 dB below target at 53 Hz (-8.0 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+1.6 dB at 30 Hz) |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
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 HIFIMAN RE400 from aftersound, digaoreviews, fahryst and iemworld; the NiceHCK DB2 from achoreviews, audioamigo, awsmdanny, cqtek, eplv, jaytiss, obodio, riz, silicagel, suporsalad, theaudiostore, tonedeafmonk and treblewellxtended, all via squig.link.
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