Short answer: a tie on sound quality. Both are rated 3.4/5 (#900 and #905 of 1369 in-ear headphones) at nearly the same price ($6.99 vs $6), so choose on features and fit.
What the Tanchjim Ola II does well: A broadly balanced tuning with a preference score of 66 against the Harman target. The catch: An uneven response, 2.6 dB standard deviation from target.
What the TRN TA4 does well: A broadly balanced tuning with a preference score of 66 against the Harman target. Watch for: Treble about 3 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the Tanchjim Ola II or the TRN TA4 on features: they are rated the same for sound quality at close to the same price.
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A broadly balanced tuning with a preference score of 66 against the Harman target.
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A broadly balanced tuning with a preference score of 66 against the Harman target.
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Specifications Side By Side
| Tanchjim Ola II | TRN TA4 | |
|---|---|---|
| Price | 6.99 | 6.00 |
| Ranked | #900 of 1369 in In-Ear Headphones | #905 of 1369 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 66 (median of 6 squig.link measurements, calibrated to AutoEQ) | 66 (median of 4 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.58 dB standard deviation | 2.82 dB standard deviation |
| Tonal Tilt | -0.35 (negative is warmer, positive brighter) | -0.21 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.8 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-3.8 dB at 30 Hz) |
| Driver Type | Hybrid | Hybrid |
| Drivers | 1 dynamic driver + 1 balanced armature (10mm DMT5 dynamic + PURE Hi balanced armature) | 2 dynamic drivers + 2 balanced armatures (10mm beryllium DD + 6mm titanium DD + dual Knowles 33518 BA) |
| Impedance | 30 ohms | 20 ohms |
| Sensitivity | 121 dB/Vrms | 105 dB |
| Frequency Response | 8Hz - 48kHz | 20Hz - 40kHz |
| Weight | 0 lbs (5 g) | - |
| Connection | Wired | Wired |
Frequency Response Compared
Both headphones’ measurements overlaid on the Harman target. Above the target sounds louder in that range, below it quieter. Each curve is the median of several independent measurements, shifted so its 500 Hz to 2 kHz average sits at 0 dB, so only the tuning is compared.
Measurement data: the Tanchjim Ola II from aftersound, atechreviews, audioamigo, csi-zone, samreviews and soundignity; the TRN TA4 from arn, eplv, ianfann and tonedeafmonk, all via squig.link.
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