Short answer: the Fearless Audio S6Rui. It ranks #372 of 450 in-ear headphones by sound quality, rated 3.3/5, at $389. The FiiO FH7S ranks #375, rated 3.2/5, at $299.99, $89.01 cheaper, a saving that is not big enough to make up the sound-quality gap.
The case for the Fearless Audio S6Rui: Six balanced armature drivers per side earn a preference score of 65 in crinacle’s measurement, a serviceable match to the Harman target. Watch for: A 2.7 dB standard deviation from target points to an uneven response that benefits from some EQ.
The case for the FiiO FH7S: Oratory1990 measured bass about 4.6 dB above the Harman target, so kick drums and bass lines hit with real weight for a hybrid built around a 13.6mm dynamic driver and four balanced armatures. The catch: Low mids run 2.4 dB hot on top of the bass lift, which can make male vocals and bass instruments thick.
Buy the Fearless Audio S6Rui. It is rated higher for sound quality, and saving $89.01 with the FiiO FH7S does not make up for the sound-quality gap.
Still deciding? The full Headphones rankings cover every ranked option.
Specifications Side By Side
| Fearless Audio S6Rui | FiiO FH7S | |
|---|---|---|
| Price | $389.00 | $299.99 |
| Ranked | #372 of 450 in In-Ear Headphones | #375 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 65 (measured by crinacle, via AutoEQ) | 64 (measured by oratory1990, via AutoEQ) |
| Deviation From Target | 2.70 dB standard deviation | 2.76 dB standard deviation |
| Tonal Tilt | -0.55 (negative is warmer, positive brighter) | -0.63 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Driver Type | Balanced armature | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | 6 x balanced armature | 1 x 13.6mm dynamic + 4 x balanced armature |
| Impedance | 20 ohms | 18 ohms |
| Sensitivity | 113 dB | 104 dB/mW |
| Frequency Response | 15Hz - 20kHz (Manufacturer specified) | 10Hz - 40kHz (Manufacturer specified) |
| Built-in Microphone | No | - |
| Sub-bass Extension | - | Within 6 dB of target down to 20 Hz (-0.9 dB at 30 Hz) |
| Weight | - | 0 lbs (9 g) per earbud |
Related Headphone Comparisons
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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
Fearless Audio S6Rui: $389.00 Linsoul eBay
Pros: Six balanced armature drivers per side earn a preference score of 65 in crinacle’s measurement, a serviceable match to the Harman target. A 20 ohm impedance and 113 dB sensitivity let it reach loud levels straight from a phone or dongle. It earns the same rating as the OpenAudio Mercury for noticeably less money.
Cons: A 2.7 dB standard deviation from target points to an uneven response that benefits from some EQ. The Fearless Audio S8F from the same maker rates higher for a modest step up in price.
Full Fearless Audio S6Rui review and specifications →
| Back | Closed |
|---|---|
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 2.70 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 6 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 15Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 65 (measured by crinacle, via AutoEQ) |
| Impedance | 20 ohms |
| Sensitivity | 113 dB |
| Tonal Tilt | -0.55 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -6.5 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 | +1.8 dB | 0.70 |
| Peak | 166 Hz | -4.4 dB | 0.48 |
| Peak | 851 Hz | +3.4 dB | 1.06 |
| Peak | 2,720 Hz | +2.4 dB | 3.00 |
| Peak | 1,770 Hz | -1.3 dB | 2.18 |
| High shelf | 10,000 Hz | +6.5 dB | 0.70 |
| Peak | 5,650 Hz | +6.2 dB | 2.53 |
| Peak | 4,718 Hz | -4.5 dB | 3.03 |
| Peak | 8,599 Hz | +3.3 dB | 2.26 |
| Peak | 3,846 Hz | -1.8 dB | 6.00 |
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FiiO FH7S: $299.99 Amazon AliExpress eBay
Pros: Oratory1990 measured bass about 4.6 dB above the Harman target, so kick drums and bass lines hit with real weight for a hybrid built around a 13.6mm dynamic driver and four balanced armatures. Treble is close to target, and an 18 ohm impedance makes it easy to drive from a phone despite the 104 dB/mW sensitivity. It suits warm, bassy tastes.
Cons: Low mids run 2.4 dB hot on top of the bass lift, which can make male vocals and bass instruments thick. A 6.1 dB peak near 8 kHz can make cymbals and sibilants sharp. The Tin HiFi P1 Max and FiiO FD5 both have higher ratings.
Full FiiO FH7S review and specifications →
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.76 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | 1 x 13.6mm dynamic + 4 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 64 (measured by oratory1990, via AutoEQ) |
| Impedance | 18 ohms |
| Sensitivity | 104 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.9 dB at 30 Hz) |
| Tonal Tilt | -0.63 (negative is warmer, positive brighter) |
| Weight | 0 lbs (9 g) per earbud |
EQ preset to match the Harman target
Set a preamp of -5.4 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 | +0.5 dB | 0.70 |
| Peak | 174 Hz | -4.7 dB | 0.67 |
| Peak | 5,596 Hz | +4.4 dB | 1.65 |
| Peak | 779 Hz | +3.3 dB | 1.24 |
| Peak | 2,065 Hz | +1.6 dB | 3.03 |
| High shelf | 10,000 Hz | -3.5 dB | 0.70 |
| Peak | 3,961 Hz | +1.5 dB | 3.23 |
| Peak | 3,138 Hz | -1.8 dB | 4.83 |
| Peak | 6,273 Hz | +2.3 dB | 5.99 |
| Peak | 5,471 Hz | -1.8 dB | 6.00 |
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