Short answer: the Intuaura Reference 2019. It ranks #5 of 450 in-ear headphones by sound quality, rated 4.9/5, at $34.99; the KZ Duonic ranks #85, rated 4.5/5, at $34.99. The price gap is small enough that the sound-quality ranking should decide it.
The Intuaura Reference 2019 is the better-sounding option. In the median of five hobbyist measurements on squig.link, the Reference 2019 posts a preference score of 87 with under 1 dB of unevenness, among the most accurate in-ears measured. The catch: Treble runs a bit lively, with a 5.8 dB peak near 8 kHz and the air band about 2.3 dB high, so bright recordings can sound sharp.
Why pick the KZ Duonic: Five squig.link measurements give the Duonic a preference score of 79.2, a strong showing for a cheap dynamic and planar hybrid. The catch: Air above 10 kHz runs about 5.2 dB hot with a 5.5 dB peak near 8.1 kHz, so cymbals can turn splashy and bright tracks fatiguing.
Buy the Intuaura Reference 2019. It is rated higher for sound quality than the KZ Duonic at the same price, which makes it the one to get unless you need something the other one does better.
Looking for alternatives? See the complete Headphones rankings.
Specifications Side By Side
| Intuaura Reference 2019 | KZ Duonic | |
|---|---|---|
| Price | $34.99 | $34.99 |
| Ranked | #5 of 450 in In-Ear Headphones | #85 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 87 (median of 5 squig.link measurements, calibrated to AutoEQ) | 79 (median of 5 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 0.95 dB standard deviation | 1.55 dB standard deviation |
| Tonal Tilt | -0.04 (negative is warmer, positive brighter) | -0.13 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.5 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid (1 dynamic + 1 planar magnetic) |
| Drivers | 1 x 10mm dynamic | 1 x 8mm dynamic + 1 x planar magnetic |
| Impedance | 32 ohms | 24 ohms |
| Sensitivity | 105 dB/Vrms | 103 dB |
| Frequency Response | 5Hz - 22kHz (Manufacturer specified) | 10Hz - 20kHz (Manufacturer specified) |
| Built-in Microphone | No | - |
Related Headphone Comparisons
More top alternatives to Intuaura Reference 2019:
- EPZ Q1 Pro vs Intuaura Reference 2019
- Intuaura Reference 2019 vs CCA Phoenix
- KZ Duonic vs Ooopusx OP22
- KZ Duonic vs KZ Vader
- KZ Duonic vs TRI Meteor
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.
As an eBay Partner, we may be compensated if you make a purchase.
The Two Headphones In Full
Intuaura Reference 2019: $34.99 Amazon eBay
Pros: In the median of five hobbyist measurements on squig.link, the Reference 2019 posts a preference score of 87 with under 1 dB of unevenness, among the most accurate in-ears measured. Sub-bass sits about 1 dB above target, giving kick drums a satisfying thump, while mids stay neutral. Its single 10 mm dynamic driver is an inexpensive way to get top tier tuning.
Cons: Treble runs a bit lively, with a 5.8 dB peak near 8 kHz and the air band about 2.3 dB high, so bright recordings can sound sharp. The EPZ G10 earns the same rating for less, and there is no microphone for calls.
Full Intuaura Reference 2019 review and specifications →
| Released | Sep 2025 (1 year ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 0.95 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 5Hz - 22kHz (Manufacturer specified) |
| Harman Preference Score | 87 (median of 5 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 105 dB/Vrms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.4 dB at 30 Hz) |
| Tonal Tilt | -0.04 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
KZ Duonic: $34.99 Amazon eBay
Pros: Five squig.link measurements give the Duonic a preference score of 79.2, a strong showing for a cheap dynamic and planar hybrid. Bass sits about 2.7 dB above target with sub-bass extending to 20 Hz, so it delivers warm, energetic low end for V-shaped tastes. It costs less than the equally rated Kefine Klean and Ooopusx OP24.
Cons: Air above 10 kHz runs about 5.2 dB hot with a 5.5 dB peak near 8.1 kHz, so cymbals can turn splashy and bright tracks fatiguing. A 3.5 dB dip near 3.8 kHz and a presence band 2 dB below target recess vocals slightly behind the boosted bass and treble.
Full KZ Duonic review and specifications →
| Released | 2025 (1 year ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 1.55 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 1 planar magnetic) |
| Drivers | 1 x 8mm dynamic + 1 x planar magnetic |
| Form Factor | In-ear |
| Frequency Response | 10Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 79 (median of 5 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 24 ohms |
| Sensitivity | 103 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.5 dB at 30 Hz) |
| Tonal Tilt | -0.13 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons