Short answer: the KZ AS24. It ranks #271 of 450 in-ear headphones by sound quality, rated 4.0/5, at $138. The Juzear x Koto Nebula ranks #296, rated 3.9/5, at $129.99, $8.01 cheaper, which does not close the gap in sound quality.
Buy the KZ AS24. It is rated higher for sound quality, and the $8.01 saving on the Juzear x Koto Nebula is not enough to make up the difference.
Looking for alternatives? See the complete Headphones rankings.
Specifications Side By Side
| KZ AS24 | Juzear x Koto Nebula | |
|---|---|---|
| Price | $138.00 | $129.99 |
| Ranked | #271 of 450 in In-Ear Headphones | #296 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 73 (median of 6 squig.link measurements, calibrated to AutoEQ) | 73 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.15 dB standard deviation | 2.00 dB standard deviation |
| Tonal Tilt | +0.21 (negative is warmer, positive brighter) | -0.70 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-4.2 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+0.7 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Balanced armature | Hybrid (1 dynamic + 3 balanced armature + 1 planar) |
| Drivers | 12 x balanced armature | 1 x dynamic + 3 x balanced armature + 1 x micro planar |
| Sensitivity | 109 dB | 110 dB |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) | 20Hz - 20kHz (Manufacturer specified) |
| Impedance | - | 32 ohms |
| Weight | - | 0 lbs (6.1 g) per earbud |
| Built-in Microphone | - | No |
Related Headphone Comparisons
More top alternatives to KZ AS24:
- KZ AS24 vs Tin HiFi T5S
- KZ AS24 vs Twistura Woodnote
- Colorfly Silver Reference vs Juzear x Koto Nebula
- Etymotic ER2XR vs Juzear x Koto Nebula
- Juzear x Koto Nebula vs Oriveti Bleqk Purecaster
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
KZ AS24: $138.00 Amazon eBay
Full KZ AS24 review and specifications →
| Released | Jun 2023 (3 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.15 dB standard deviation |
| Driver Type | Balanced armature |
| Drivers | 12 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 73 (median of 6 squig.link measurements, calibrated to AutoEQ) |
| Sensitivity | 109 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-4.2 dB at 30 Hz) |
| Tonal Tilt | +0.21 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Juzear x Koto Nebula: $129.99 Amazon eBay
Full Juzear x Koto Nebula review and specifications →
| Released | 2026 (this year) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 2.00 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 3 balanced armature + 1 planar) |
| Drivers | 1 x dynamic + 3 x balanced armature + 1 x micro planar |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 73 (median of 7 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 110 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.7 dB at 30 Hz) |
| Tonal Tilt | -0.70 (negative is warmer, positive brighter) |
| Weight | 0 lbs (6.1 g) per earbud |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons