Short answer: the TRN Azure Dragon. Both are rated 4.0/5 for sound quality (#254 and #253 of 450 in-ear headphones), and the TRN Azure Dragon costs $210 against $219 for the HiBy Project Ace, and with sound quality even, the cheaper one is the better buy.
Buy the TRN Azure Dragon. Both are rated the same for sound quality, and it costs $9 less than the HiBy Project Ace.
Looking for alternatives? See the complete Headphones rankings.
Specifications Side By Side
| HiBy Project Ace | TRN Azure Dragon | |
|---|---|---|
| Price | $219.00 | $210.00 |
| Ranked | #253 of 450 in In-Ear Headphones | #254 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 74 (median of 4 squig.link measurements, calibrated to AutoEQ) | 74 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.07 dB standard deviation | 2.16 dB standard deviation |
| Tonal Tilt | +0.15 (negative is warmer, positive brighter) | +0.02 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.5 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.9 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Planar magnetic |
| Drivers | 1 x 12mm dynamic | 1 x 14.6mm planar magnetic |
| Impedance | 32 ohms | 32 ohms |
| Sensitivity | 115 dB | 108 dB |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) | 7Hz - 40kHz (Manufacturer specified) |
| Weight | 0 lbs (8.3 g) | 0 lbs (8.2 g) per earbud |
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- Edifier Stax Spirit S10 vs TRN Azure Dragon
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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
HiBy Project Ace: $219.00 Amazon eBay
Full HiBy Project Ace review and specifications →
| Released | 2024 (2 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.07 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 12mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 74 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 115 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.5 dB at 30 Hz) |
| Tonal Tilt | +0.15 (negative is warmer, positive brighter) |
| Weight | 0 lbs (8.3 g) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
TRN Azure Dragon: $210.00 Amazon eBay
Full TRN Azure Dragon review and specifications →
| Released | Mar 2024 (2 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.16 dB standard deviation |
| Driver Type | Planar magnetic |
| Drivers | 1 x 14.6mm planar magnetic |
| Form Factor | In-ear |
| Frequency Response | 7Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 74 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 108 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.9 dB at 30 Hz) |
| Tonal Tilt | +0.02 (negative is warmer, positive brighter) |
| Weight | 0 lbs (8.2 g) per earbud |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons