Short answer: a tie on sound quality. Both are rated 4.1/5 (#213 and #216 of 450 in-ear headphones), so choose on features and fit.
The case for the AUNE Jasper: Crinacle’s measurement gives it a preference score of 75, and across six hobbyist measurements on squig.link every band from bass to upper mids lands within 1.5 dB of target, so vocals and instruments sound natural and evenly balanced. Watch for: Sub-bass sits about 2.5 dB under target, so the deepest synth and organ notes have a little less weight than the best tunings deliver.
Why pick the ThieAudio Legacy 2: Crinacle’s measurement gives it a preference score of 75, and the median of 13 squig.link measurements keeps sub-bass, bass, low mids and upper mids within 0.7 dB of target, so vocals and instruments sound clean and correctly weighted. The tradeoff: Presence runs about 2.9 dB and air about 3.4 dB below target, with a 6.8 dB dip near 11.9 kHz, so cymbals lack some sparkle and the top end feels slightly reserved.
Buy the AUNE Jasper or the ThieAudio Legacy 2 on features: they are rated the same for sound quality at close to the same price.
Looking for alternatives? See the complete Headphones rankings.
Specifications Side By Side
| AUNE Jasper | ThieAudio Legacy 2 | |
|---|---|---|
| Price | $239.00 | - |
| Ranked | #213 of 450 in In-Ear Headphones | #216 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Harman Preference Score | 75 (measured by crinacle, via AutoEQ) | 75 (measured by crinacle, via AutoEQ) |
| Deviation From Target | 2.29 dB standard deviation | 2.10 dB standard deviation |
| Tonal Tilt | +0.01 (negative is warmer, positive brighter) | +0.11 (negative is warmer, positive brighter) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Hybrid (1 dynamic + 1 balanced armature) |
| Drivers | 1 x 10mm dynamic | 1 x 10mm dynamic + 1 x balanced armature |
| Impedance | 32 ohms | 32 ohms |
| Sensitivity | 102 dB/mW | 108 dB |
| Frequency Response | 5Hz - 40kHz (Manufacturer specified) | 20Hz - 20kHz (Manufacturer specified) |
| Back | Closed | Closed |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.1 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.7 dB at 30 Hz) |
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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
AUNE Jasper: $239.00 Amazon eBay
Pros: Crinacle’s measurement gives it a preference score of 75, and across six hobbyist measurements on squig.link every band from bass to upper mids lands within 1.5 dB of target, so vocals and instruments sound natural and evenly balanced. A slight 1.5 dB bass lift adds warmth without bloat, and sub-bass stays within 6 dB of target all the way to 20 Hz. The 32 ohm, 102 dB/mW load runs comfortably from a phone or dongle.
Cons: Sub-bass sits about 2.5 dB under target, so the deepest synth and organ notes have a little less weight than the best tunings deliver. A 6.1 dB dip near 11.2 kHz in the squig.link median trims some air and shimmer from cymbals. The Shuoer S12 Pro rates nearly as high for less money.
Full AUNE Jasper review and specifications →
| Released | Jan 2021 (5 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.29 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x 10mm dynamic |
| Form Factor | In-ear |
| Frequency Response | 5Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 75 (measured by crinacle, via AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 102 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-3.1 dB at 30 Hz) |
| Tonal Tilt | +0.01 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -4.9 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 | +3.1 dB | 0.70 |
| Peak | 8,520 Hz | +7.5 dB | 0.86 |
| Peak | 155 Hz | -2.7 dB | 0.52 |
| Peak | 801 Hz | +3.1 dB | 0.84 |
| Peak | 3,153 Hz | -3.0 dB | 0.40 |
| High shelf | 10,000 Hz | -4.4 dB | 0.70 |
| Peak | 6,182 Hz | +2.1 dB | 5.90 |
| Peak | 4,821 Hz | -1.4 dB | 5.25 |
| Peak | 3,710 Hz | +0.8 dB | 4.25 |
| Peak | 38 Hz | -0.3 dB | 2.66 |
- Reviews, Comparisons and Sound Samples
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ThieAudio Legacy 2 AliExpress eBay
Pros: Crinacle’s measurement gives it a preference score of 75, and the median of 13 squig.link measurements keeps sub-bass, bass, low mids and upper mids within 0.7 dB of target, so vocals and instruments sound clean and correctly weighted. The hybrid pairing of a 10mm dynamic driver with a balanced armature holds deep bass to 20 Hz, and 108 dB sensitivity at 32 ohms makes it easy to drive from a phone.
Cons: Presence runs about 2.9 dB and air about 3.4 dB below target, with a 6.8 dB dip near 11.9 kHz, so cymbals lack some sparkle and the top end feels slightly reserved. A 4.4 dB peak near 10.3 kHz just below that dip makes the upper treble a little uneven.
Full ThieAudio Legacy 2 review and specifications →
| Released | Jun 2021 (5 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.10 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) |
| Drivers | 1 x 10mm dynamic + 1 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 20kHz (Manufacturer specified) |
| Harman Preference Score | 75 (measured by crinacle, via AutoEQ) |
| Impedance | 32 ohms |
| Sensitivity | 108 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.7 dB at 30 Hz) |
| Tonal Tilt | +0.11 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -6.3 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 | 223 Hz | -2.5 dB | 1.18 |
| Peak | 1,933 Hz | -2.7 dB | 1.52 |
| Peak | 9,528 Hz | +4.3 dB | 0.46 |
| Peak | 225 Hz | +0.7 dB | 1.37 |
| High shelf | 10,000 Hz | +3.3 dB | 0.70 |
| Peak | 858 Hz | +1.1 dB | 2.58 |
| Peak | 7,553 Hz | -3.0 dB | 5.71 |
| Peak | 6,208 Hz | +2.3 dB | 5.96 |
| Peak | 4,888 Hz | -1.8 dB | 5.37 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons