Short answer: the Tanchjim Ola II. It ranks #900 of 1369 in-ear headphones by sound quality, rated 3.4/5, at $6.99; the Rose Technics Photon Pro ranks #958, rated 3.3/5, and costs $7.59, so there is little reason to consider the other one.
What the Tanchjim Ola II does well: A broadly balanced tuning with a preference score of 66 against the Harman target. The tradeoff: An uneven response, 2.6 dB standard deviation from target.
What the Rose Technics Photon Pro does well: A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap. The tradeoff: An uneven response, 2.7 dB standard deviation from target.
Buy the Tanchjim Ola II. It is rated higher for sound quality than the Rose Technics Photon Pro and costs less, so only choose the other one for a particular feature it does better.
Looking for alternatives? See the complete Headphones rankings.
A broadly balanced tuning with a preference score of 66 against the Harman target.
Linsoul eBay
A published AutoEQ preset corrects its response toward the Harman target, so a few minutes of EQ setup closes most of the gap.
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Specifications Side By Side
| Tanchjim Ola II | Rose Technics Photon Pro | |
|---|---|---|
| Price | 6.99 | 7.59 |
| Ranked | #900 of 1369 in In-Ear Headphones | #958 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) | 65 (median of 3 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.58 dB standard deviation | 2.70 dB standard deviation |
| Tonal Tilt | -0.35 (negative is warmer, positive brighter) | -0.42 (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 (-1.2 dB at 30 Hz) |
| Driver Type | Hybrid | Dynamic |
| Drivers | 1 dynamic driver + 1 balanced armature (10mm DMT5 dynamic + PURE Hi balanced armature) | 1 x 8mm PEK PU dynamic driver |
| Impedance | 30 ohms | 32 ohms |
| Sensitivity | 121 dB/Vrms | 100 dB |
| Frequency Response | 8Hz - 48kHz | 20Hz - 20kHz |
| Weight | 0 lbs (5 g) | 0 lbs (1.8 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 Rose Technics Photon Pro from audioamigo, digaoreviews, elrics, lumerion and soundignity, all via squig.link.
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