Short answer: the FiiO FH5. It ranks #393 of 450 in-ear headphones by sound quality, rated 3.0/5, at $1,138.53. The DUNU DK4001 ranks #401, rated 2.9/5, at $899, $239.53 cheaper, which does not close the gap in sound quality.
Why pick the FiiO FH5: In oratory1990’s measurement the bass and low mids sit only 0.6 to 1.4 dB above the Harman target, so kick drums and bass guitar have a warm, full body without bloating. The tradeoff: Presence between 3 and 6 kHz runs about 7.3 dB under target, with a 9.6 dB dip near 4.7 kHz, so vocals, snare and guitar attack sound recessed and distant.
What the DUNU DK4001 does well: Its hybrid design pairs a 13mm dynamic driver with four balanced armatures, and at 112 dB sensitivity and 32 ohms it plays loud from a phone. Watch for: Presence is about 8.1 dB under target and air about 7.7 dB under, with a 12 dB hole near 11.9 kHz, so vocals sound distant and cymbals lose shimmer.
Buy the FiiO FH5. It is rated higher for sound quality, and the $239.53 you would save on the DUNU DK4001 does not close the gap.
Looking for alternatives? See the complete Headphones rankings.
Specifications Side By Side
| FiiO FH5 | DUNU DK4001 | |
|---|---|---|
| Price | $1,138.53 | $899.00 |
| Ranked | #393 of 450 in In-Ear Headphones | #401 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 61 (measured by oratory1990, via AutoEQ) | 60 (measured by HypetheSonics, via AutoEQ) |
| Deviation From Target | 2.96 dB standard deviation | 3.52 dB standard deviation |
| Tonal Tilt | -1.08 (negative is warmer, positive brighter) | +0.16 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.7 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-5.1 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 3 balanced armature) | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | 1 x 10mm dynamic + 3 x balanced armature | 1 x 13mm dynamic + 4 x balanced armature |
| Impedance | 19 ohms | 32 ohms |
| Sensitivity | 112 dB/mW | 112 dB |
| Weight | 0 lbs (8 g) per earbud | - |
| Frequency Response | 15Hz - 40kHz (Manufacturer specified) | 5Hz - 40kHz (Manufacturer specified) |
| Back | Closed | Closed |
| Built-in Microphone | - | No |
Related Headphone Comparisons
How FiiO FH5 compares with other leading options:
- Sennheiser IE 900 vs FiiO FH5
- FiiO FH5 vs InEar StageDiver SD5
- FiiO FH5 vs Westone MACH 80
- FiiO FH5 vs Audio-Technica ATH-IEX1
- DUNU DK4001 vs Fidue A91 Sirius
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
FiiO FH5: $1,138.53 Amazon eBay
Pros: In oratory1990’s measurement the bass and low mids sit only 0.6 to 1.4 dB above the Harman target, so kick drums and bass guitar have a warm, full body without bloating. The hybrid design pairs a 10mm dynamic driver with 3 balanced armatures, and the 19 ohm impedance and 112 dB/mW sensitivity mean a phone or dongle drives it easily. Sub-bass is slightly lifted by 0.8 dB, which suits warm and bassy tastes.
Cons: Presence between 3 and 6 kHz runs about 7.3 dB under target, with a 9.6 dB dip near 4.7 kHz, so vocals, snare and guitar attack sound recessed and distant. Air above 10 kHz is down about 3.2 dB, which takes some sparkle off cymbals. A preference score of 61 and an uneven response with a 2.96 dB deviation leave it behind the HIFIMAN RE2000 for tonal accuracy.
Full FiiO FH5 review and specifications →
| Back | Closed |
|---|---|
| Connection | Wired |
| Deviation From Target | 2.96 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 3 balanced armature) |
| Drivers | 1 x 10mm dynamic + 3 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 15Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 61 (measured by oratory1990, via AutoEQ) |
| Impedance | 19 ohms |
| Sensitivity | 112 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.7 dB at 30 Hz) |
| Tonal Tilt | -1.08 (negative is warmer, positive brighter) |
| Weight | 0 lbs (8 g) per earbud |
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 | -2.4 dB | 0.70 |
| Peak | 3,870 Hz | +6.6 dB | 1.63 |
| Peak | 191 Hz | -2.7 dB | 1.11 |
| Peak | 1,347 Hz | -1.8 dB | 1.19 |
| Peak | 9,899 Hz | +2.5 dB | 2.75 |
| High shelf | 10,000 Hz | -1.8 dB | 0.70 |
| Peak | 69 Hz | +0.9 dB | 1.61 |
| Peak | 122 Hz | -0.6 dB | 2.38 |
| Peak | 6,634 Hz | -1.7 dB | 6.00 |
| Peak | 5,997 Hz | +1.5 dB | 6.00 |
- Reviews, Comparisons and Sound Samples
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DUNU DK4001: $899.00 HiFiGo eBay
Pros: Its hybrid design pairs a 13mm dynamic driver with four balanced armatures, and at 112 dB sensitivity and 32 ohms it plays loud from a phone. HypetheSonics’ measurement shows its best match is a warm, bass leaning taste, and its rating equals the Audio-Technica ATH-CK2000Ti. A preference score of 60 leaves plenty of room for listeners willing to apply EQ.
Cons: Presence is about 8.1 dB under target and air about 7.7 dB under, with a 12 dB hole near 11.9 kHz, so vocals sound distant and cymbals lose shimmer. A 6.1 dB peak near 7.7 kHz on top of that uneven treble, 3.52 dB of deviation overall, adds edginess to sibilants. Sub-bass sits about 5.2 dB low, and it rates below the Fatfreq Reference Pro SE and InEar StageDiver SD5.
Full DUNU DK4001 review and specifications →
| Released | 2019 (7 years ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 3.52 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | 1 x 13mm dynamic + 4 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 5Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 60 (measured by HypetheSonics, via AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 112 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-5.1 dB at 30 Hz) |
| Tonal Tilt | +0.16 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -6.2 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 | +2.4 dB | 0.70 |
| Peak | 5,069 Hz | +19.7 dB | 0.43 |
| Peak | 6,458 Hz | -20.0 dB | 1.04 |
| Peak | 1,949 Hz | -18.2 dB | 0.73 |
| Peak | 2,310 Hz | +12.4 dB | 1.07 |
| High shelf | 10,000 Hz | -4.6 dB | 0.70 |
| Peak | 176 Hz | -1.6 dB | 1.09 |
| Peak | 9,726 Hz | +3.0 dB | 3.09 |
| Peak | 705 Hz | +0.9 dB | 1.20 |
| Peak | 1,405 Hz | -1.0 dB | 3.61 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons