The THIEAUDIO Legacy 3 ranks #757 out of 1253 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: Thieaudio
Prices on this page were last checked October 16, 2026 at 5:46 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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#757 THIEAUDIO Legacy 3: $119 Discontinued eBay
Same family: the ThieAudio Legacy 2 (lower-end model, ranked higher, rated 4.1/5), the ThieAudio Legacy 4 (higher-end model, ranked higher, rated 4.8/5), the ThieAudio Legacy 5 (higher-end model, ranked lower, rated 3.2/5) and the ThieAudio Legacy 9 (higher-end model, ranked lower, rated 2.6/5).
Pros: A broadly balanced tuning with a preference score of 69 against the Harman target.
Cons: Treble about 5 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones. An uneven response, 2.3 dB standard deviation from target. Discontinued.
Is the THIEAUDIO Legacy 3 right for you?
Buy it if
- you are sensitive to bright or sharp treble (treble sits 4.7 dB below target).
- you are happy to use EQ: our preset lifts its Harman match by about 15 points.
Skip it if
- you want to buy it new: it is discontinued.
| Back | Closed |
|---|---|
| Connection | Wired (3.5mm) |
| Deviation From Target | 2.33 dB standard deviation |
| Driver Type | Hybrid |
| Drivers | 1 Dynamic, 2 Balanced Armature |
| Form Factor | In-ear |
| Harman Preference Score | 69 (median of 6 squig.link measurements, calibrated to AutoEQ) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-1.1 dB at 30 Hz) |
| Tonal Tilt | -0.56 (negative is warmer, positive brighter) |
EQ Presets
Harman target
Set a preamp of -6.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 6 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 84 out of 100, up from 69.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.4 dB | 0.70 |
| High shelf | 10,000 Hz | +1.0 dB | 0.70 |
| Peak | 1,768 Hz | -2.5 dB | 4.23 |
| Peak | 4,656 Hz | +6.0 dB | 1.23 |
Neutral target
Set a preamp of -6.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 6 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 84 out of 100, up from 38.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -7.2 dB | 0.70 |
| High shelf | 10,000 Hz | +1.0 dB | 0.70 |
| Peak | 1,768 Hz | -2.5 dB | 4.24 |
| Peak | 4,655 Hz | +6.0 dB | 1.23 |
Studio flat target
Set a preamp of -6.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 6 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 84 out of 100, up from 19.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -9.7 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 199 Hz | -3.3 dB | 0.87 |
| Peak | 4,021 Hz | +6.0 dB | 0.97 |
Warm target
Set a preamp of -5.0 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 6 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 91 out of 100, up from 79.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +1.6 dB | 0.70 |
| High shelf | 10,000 Hz | -2.4 dB | 0.70 |
| Peak | 218 Hz | -1.4 dB | 1.79 |
| Peak | 1,791 Hz | -2.8 dB | 4.48 |
| Peak | 2,932 Hz | +1.7 dB | 2.93 |
| Peak | 5,345 Hz | +5.0 dB | 1.48 |
| Peak | 7,647 Hz | -2.0 dB | 6.00 |
Bass target
Set a preamp of -6.1 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 6 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 86 out of 100, up from 67.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.2 dB | 0.70 |
| High shelf | 10,000 Hz | +1.0 dB | 0.70 |
| Peak | 1,768 Hz | -2.5 dB | 4.22 |
| Peak | 4,657 Hz | +6.0 dB | 1.23 |
Bright target
Set a preamp of -6.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 6 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 77 out of 100, up from 25.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -7.2 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 202 Hz | -1.6 dB | 1.09 |
| Peak | 1,761 Hz | -2.7 dB | 3.96 |
| Peak | 2,833 Hz | +1.7 dB | 3.80 |
| Peak | 4,321 Hz | +6.0 dB | 1.10 |
| Peak | 5,657 Hz | +1.8 dB | 6.00 |
V-shaped target
Set a preamp of -6.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by Speaker Ranking from the median of 6 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 74 out of 100, up from 57.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +5.8 dB | 0.70 |
| High shelf | 10,000 Hz | +2.0 dB | 0.70 |
| Peak | 1,708 Hz | -2.6 dB | 3.30 |
| Peak | 2,776 Hz | +1.7 dB | 4.10 |
| Peak | 4,056 Hz | +6.0 dB | 1.04 |
| Peak | 5,634 Hz | +2.3 dB | 6.00 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the THIEAUDIO Legacy 3 measures across the audible range, against the Harman in-ear target that most listeners prefer in blind tests. Where the line sits above the target that range sounds louder (more bass, brighter treble), below it quieter. The curve is the median of 6 independent measurements, so one odd sample or rig cannot skew it, and both lines are shifted so their 500 Hz to 2 kHz average sits at 0 dB.
Measurement data: median of 6 measurements from the squig.link databases of elrics, harutohiroki, hbb, mmagtech, musicafe and sl0the. Thanks to each of them for publishing their work.