Short answer: the Tanchjim Fola. It ranks #511 of 1291 in-ear headphones by sound quality, rated 3.9/5, at $199.99; the Erand Resonance 5 ranks #593, rated 3.8/5, at $199.99. The price gap is small enough that the sound-quality ranking should decide it.
Why pick the Tanchjim Fola: The median of 8 hobbyist measurements gives it a solid Harman preference score of 72 with a 2.19 dB spread, and its mids sit within about 0.5 dB of target, so vocals and instruments sound natural. The tradeoff: A 5.4 dB peak near 8.2 kHz can make cymbals and sibilance sound sharp.
Why pick the Erand Resonance 5: A $200 tribrid that measures well (score 71 across thirteen measurements) with bass right on target and full sub-bass, plus swappable 3.5mm and 4.4mm plugs. Watch for: Treble sits about 4.0 dB below target, so it can sound smooth and a little dark next to brighter IEMs.
Buy the Tanchjim Fola. It is rated higher for sound quality than the Erand Resonance 5 at the same price, so only choose the other one for a particular feature it does better.
Still deciding? The full Headphones rankings cover every ranked option.
The median of 8 hobbyist measurements gives it a solid Harman preference score of 72 with a 2.19 dB spread, and its mids sit within about 0.5 dB of target, so vocals and instruments sound natural.
Amazon $199.99 eBay
A $200 tribrid that measures well (score 71 across thirteen measurements) with bass right on target and full sub-bass, plus swappable 3.5mm and 4.4mm plugs.
Amazon $199.99 eBayPrices 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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Specifications Side By Side
| Tanchjim Fola | Erand Resonance 5 | |
|---|---|---|
| Price | $199.99 | $199.99 |
| Ranked | #511 of 1291 in In-Ear Headphones | #593 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 72 (median of 8 squig.link measurements, calibrated to AutoEQ) | 71 (median of 13 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.19 dB standard deviation | 2.09 dB standard deviation |
| Tonal Tilt | +0.26 (negative is warmer, positive brighter) | -0.69 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-4.2 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-0.1 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Dynamic | Tribrid |
| Drivers | 1 x dynamic | 2 x dynamic + 2 x balanced armature + 1 x micro planar |
| Impedance | 16 ohms | 20 ohms |
| Sensitivity | 126 dB/Vrms | 106 dB at 1 kHz |
| Frequency Response | 2Hz - 48kHz (Manufacturer specified) | 10Hz - 35kHz |
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 Fola from aftersound, atechreviews, csi-zone, silicagel, soundcheck39, soundignity, superreview and theaudiostore; the Erand Resonance 5 from aftersound, atechreviews, audioamigo, bassaudio, fernandagunsan, jaytiss, kuping-sensi, lumerion, practiphile, precog, soundcheck39, superreview and tonedeafmonk, all via squig.link.
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