Short answer: the InEar StageDiver SD5. It ranks #394 of 450 in-ear headphones by sound quality, rated 3.0/5, at $845; the DUNU DK4001 ranks #401, rated 2.9/5, and costs $899, which makes this an easy call rather than a real tradeoff.
What the InEar StageDiver SD5 does well: With a very high 120 dB sensitivity it reaches loud levels from any phone or stage monitor pack with almost no volume needed. The tradeoff: Its response deviates about 3.2 dB from target on average, an uneven tuning that colors many recordings.
The case for the DUNU DK4001: 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 InEar StageDiver SD5. It is rated higher for sound quality than the DUNU DK4001 and costs less, so it is the default pick unless a specific strength of the other one matters more to you.
Want more options? Browse the full Headphones rankings.
Specifications Side By Side
| InEar StageDiver SD5 | DUNU DK4001 | |
|---|---|---|
| Price | $845.00 | $899.00 |
| Ranked | #394 of 450 in In-Ear Headphones | #401 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 61 (measured by crinacle, via AutoEQ) | 60 (measured by HypetheSonics, via AutoEQ) |
| Deviation From Target | 3.23 dB standard deviation | 3.52 dB standard deviation |
| Tonal Tilt | -0.34 (negative is warmer, positive brighter) | +0.16 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Sensitivity | 120 dB | 112 dB |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) | 5Hz - 40kHz (Manufacturer specified) |
| Built-in Microphone | No | No |
| Sub-bass Extension | - | Within 6 dB of target down to 20 Hz (-5.1 dB at 30 Hz) |
| Driver Type | - | Hybrid (1 dynamic + 4 balanced armature) |
| Drivers | - | 1 x 13mm dynamic + 4 x balanced armature |
| Impedance | - | 32 ohms |
Related Headphone Comparisons
More worthwhile head-to-heads for InEar StageDiver SD5:
- FiiO FH5 vs InEar StageDiver SD5
- InEar StageDiver SD5 vs Audio-Technica ATH-CK2000Ti
- DUNU DK4001 vs Fidue A91 Sirius
- Audio-Technica ATH-CK2000Ti vs DUNU DK4001
- FiiO FH5 vs DUNU DK4001
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
InEar StageDiver SD5: $845.00 Thomann eBay
Pros: With a very high 120 dB sensitivity it reaches loud levels from any phone or stage monitor pack with almost no volume needed. Its preference score of 61 in crinacle’s measurement puts it level in rating with the FiiO FH5, which costs more.
Cons: Its response deviates about 3.2 dB from target on average, an uneven tuning that colors many recordings. Such high sensitivity can also reveal background hiss from noisy sources, and the Shanling ME700 matches its rating for considerably less.
Full InEar StageDiver SD5 review and specifications →
| Back | Closed |
|---|---|
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 3.23 dB standard deviation |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 61 (measured by crinacle, via AutoEQ) |
| Sensitivity | 120 dB |
| Tonal Tilt | -0.34 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -6.8 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 | +1.9 dB | 0.70 |
| Peak | 175 Hz | -4.2 dB | 0.67 |
| Peak | 4,577 Hz | +7.1 dB | 1.51 |
| Peak | 731 Hz | +2.8 dB | 2.02 |
| Peak | 6,942 Hz | -3.4 dB | 3.18 |
| High shelf | 10,000 Hz | +1.2 dB | 0.70 |
| Peak | 1,575 Hz | -2.7 dB | 1.84 |
| Peak | 1,000 Hz | +1.5 dB | 3.37 |
| Peak | 2,757 Hz | +1.4 dB | 3.24 |
| Peak | 488 Hz | +0.4 dB | 2.81 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
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