The TRN ST2 ranks #1063 out of 1398 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.
Brand: TRN
Prices on this page were last checked October 19, 2026 at 10:32 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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#1063 TRN ST2: $13.80 Discontinued eBay
Pros: A budget hybrid with one dynamic driver and one balanced armature at around $14, whose bass and midrange stay within 2 dB of target with sub bass reaching to 20 Hz, and 107 dB sensitivity runs from any phone.
Cons: Treble from 8 to 12 kHz sits about 9 dB above target, with peaks over 10 dB from 8.4 to 11.5 kHz after a dip near 6 kHz, so it sounds bright and sibilant. Deviation is high at 3 dB, and it is discontinued.
Is the TRN ST2 right for you?
Buy it if
- you want sub-bass rumble that reaches down to 20 Hz.
- you are happy to use EQ: our preset lifts its Harman match by about 13 points.
Skip it if
- you want to buy it new: it is discontinued.
| Released | Jun 2021 (5 years ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 3.04 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) |
| Drivers | 1 x 10mm dual-magnet dynamic + 1 x 30095 balanced armature |
| Form Factor | In-ear |
| Harman Preference Score | 63 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 22 ohms |
| Sensitivity | 107 dB |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-0.2 dB at 30 Hz) |
| Tonal Tilt | +0.18 (negative is warmer, positive brighter) |
EQ Presets
Harman target
Set a preamp of -5.4 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Harman match with this EQ: 76 out of 100, up from 63.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| High shelf | 10,000 Hz | -5.6 dB | 0.70 |
| Peak | 149 Hz | -3.3 dB | 1.00 |
| Peak | 2,250 Hz | -5.1 dB | 2.27 |
| Peak | 3,927 Hz | -2.6 dB | 6.00 |
| Peak | 5,582 Hz | +6.0 dB | 3.95 |
Neutral target
Set a preamp of -5.4 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Neutral match with this EQ: 78 out of 100, up from 38.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -8.3 dB | 0.70 |
| High shelf | 10,000 Hz | -5.6 dB | 0.70 |
| Peak | 134 Hz | -3.4 dB | 0.83 |
| Peak | 2,250 Hz | -5.1 dB | 2.27 |
| Peak | 3,927 Hz | -2.6 dB | 6.00 |
| Peak | 5,582 Hz | +6.0 dB | 3.95 |
Studio flat target
Set a preamp of -5.8 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Studio flat match with this EQ: 80 out of 100, up from 27.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -10.9 dB | 0.70 |
| High shelf | 10,000 Hz | -0.5 dB | 0.70 |
| Peak | 157 Hz | -5.1 dB | 0.82 |
| Peak | 2,072 Hz | -3.5 dB | 3.95 |
| Peak | 3,980 Hz | -3.7 dB | 6.00 |
| Peak | 5,615 Hz | +6.0 dB | 4.61 |
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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Warm match with this EQ: 79 out of 100, up from 58.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +0.5 dB | 0.70 |
| High shelf | 10,000 Hz | -6.0 dB | 0.70 |
| Peak | 24 Hz | +0.8 dB | 1.26 |
| Peak | 140 Hz | -3.1 dB | 0.99 |
| Peak | 749 Hz | +2.3 dB | 1.73 |
| Peak | 2,301 Hz | -6.1 dB | 2.12 |
| Peak | 3,943 Hz | -4.4 dB | 6.00 |
| Peak | 5,619 Hz | +6.0 dB | 5.04 |
| Peak | 8,000 Hz | -5.5 dB | 6.00 |
Bass target
Set a preamp of -5.4 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bass match with this EQ: 77 out of 100, up from 54.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +4.0 dB | 0.70 |
| High shelf | 10,000 Hz | -5.6 dB | 0.70 |
| Peak | 149 Hz | -3.3 dB | 1.00 |
| Peak | 2,250 Hz | -5.1 dB | 2.26 |
| Peak | 3,927 Hz | -2.6 dB | 6.00 |
| Peak | 5,582 Hz | +6.0 dB | 3.95 |
Bright target
Set a preamp of -6.6 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted Bright match with this EQ: 80 out of 100, up from 31.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -8.4 dB | 0.70 |
| High shelf | 10,000 Hz | -1.7 dB | 0.70 |
| Peak | 136 Hz | -3.4 dB | 0.83 |
| Peak | 749 Hz | +1.9 dB | 1.98 |
| Peak | 2,195 Hz | -5.0 dB | 2.69 |
| Peak | 4,804 Hz | +2.4 dB | 6.00 |
| Peak | 5,442 Hz | +6.0 dB | 3.05 |
V-shaped target
Set a preamp of -6.6 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 3 squig.link measurements, in the filter layout AutoEQ uses. Predicted V-shaped match with this EQ: 78 out of 100, up from 58.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | +4.7 dB | 0.70 |
| High shelf | 10,000 Hz | -0.3 dB | 0.70 |
| Peak | 128 Hz | -2.1 dB | 1.20 |
| Peak | 2,163 Hz | -4.4 dB | 2.80 |
| Peak | 4,771 Hz | +2.1 dB | 6.00 |
| Peak | 5,402 Hz | +6.0 dB | 2.85 |
- Reviews, Comparisons and Sound Samples
Frequency Response
How the TRN ST2 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 3 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 3 measurements from the squig.link databases of iemworld, pw and vortexreviews. Thanks to each of them for publishing their work.