Short answer: a tie on sound quality. Both are rated 4.2/5 (#188 and #176 of 450 in-ear headphones), so choose on features and fit.
The case for the Fatfreq Hayabusa: A preference score of 76 in crinacle’s measurement places its tuning reasonably close to the Harman target most listeners prefer. The catch: The response is uneven, at 1.94 dB standard deviation from target, so some frequency regions stand out or fall back.
Buy the Fatfreq Hayabusa or the NiceHCK Rockies on features: they are rated the same for sound quality at close to the same price.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| Fatfreq Hayabusa | NiceHCK Rockies | |
|---|---|---|
| Price | - | $489.00 |
| Ranked | #188 of 450 in In-Ear Headphones | #176 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 76 (measured by crinacle, via AutoEQ) | 77 (median of 12 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.94 dB standard deviation | 1.57 dB standard deviation |
| Tonal Tilt | +0.29 (negative is warmer, positive brighter) | -0.30 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Sub-bass Extension | - | Within 6 dB of target down to 20 Hz (-2.1 dB at 30 Hz) |
| Driver Type | - | Hybrid (1 dynamic + 2 balanced armature + 2 electrostatic) |
| Drivers | - | 1 x 10mm dynamic + 2 x balanced armature + 2 x electrostatic |
| Impedance | - | 9.8 ohms |
| Sensitivity | - | 121 dB/Vrms |
| Frequency Response | - | 20Hz - 20kHz (Manufacturer specified) |
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Prices on this page were last checked October 11, 2026 at 4:59 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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The Two Headphones In Full
Fatfreq Hayabusa FATfreq eBay
Pros: A preference score of 76 in crinacle’s measurement places its tuning reasonably close to the Harman target most listeners prefer. As a closed, wired in-ear it isolates from outside noise.
Cons: The response is uneven, at 1.94 dB standard deviation from target, so some frequency regions stand out or fall back. It is a wired design with no wireless option.
Full Fatfreq Hayabusa review and specifications →
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 1.94 dB standard deviation |
| Form Factor | In-ear |
| Harman Preference Score | 76 (measured by crinacle, via AutoEQ) |
| Tonal Tilt | +0.29 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -2.8 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +2.6 dB | 0.70 |
| Peak | 188 Hz | -1.4 dB | 0.82 |
| Peak | 5,241 Hz | +3.0 dB | 3.70 |
| Peak | 9,076 Hz | +2.0 dB | 2.95 |
| Peak | 69 Hz | +0.6 dB | 1.28 |
| High shelf | 10,000 Hz | -4.2 dB | 0.70 |
| Peak | 1,470 Hz | -2.0 dB | 2.41 |
| Peak | 2,478 Hz | +2.4 dB | 2.85 |
| Peak | 3,671 Hz | -1.6 dB | 3.87 |
| Peak | 855 Hz | +1.0 dB | 1.93 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
NiceHCK Rockies: $489.00 Amazon eBay
Full NiceHCK Rockies review and specifications →
| Released | Jul 2025 (1 year ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.57 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 2 balanced armature + 2 electrostatic) |
| Drivers | 1 x 10mm dynamic + 2 x balanced armature + 2 x electrostatic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 77 (median of 12 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 9.8 ohms |
| Sensitivity | 121 dB/Vrms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.1 dB at 30 Hz) |
| Tonal Tilt | -0.30 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons