Short answer: a tie on sound quality. Both are rated 3.9/5 (#280 and #304 of 450 in-ear headphones) at nearly the same price ($199 vs $199.99), so choose on features and fit.
The case for the IKKO OH10: In oratory1990’s measurement it earns a preference score of 73 with a smooth 1.9 dB standard deviation, so few frequencies stick out. The catch: A dip of about 4.5 dB near 6.2 kHz slightly softens the edge of cymbals and consonants.
Buy the IKKO OH10 or the Tanchjim Fola on features: they are rated the same for sound quality at close to the same price.
Want more options? Browse the full Headphones rankings.
Specifications Side By Side
| IKKO OH10 | Tanchjim Fola | |
|---|---|---|
| Price | $199.00 | $199.99 |
| Ranked | #280 of 450 in In-Ear Headphones | #304 of 450 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Harman Preference Score | 73 (measured by oratory1990, via AutoEQ) | 72 (median of 8 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 1.94 dB standard deviation | 2.19 dB standard deviation |
| Tonal Tilt | -0.63 (negative is warmer, positive brighter) | +0.26 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-4.2 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) | Dynamic |
| Drivers | 1 x dynamic + 1 x balanced armature | 1 x dynamic |
| Impedance | 18 ohms | 16 ohms |
| Sensitivity | 106 dB/mW | 126 dB/Vrms |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) | 2Hz - 48kHz (Manufacturer specified) |
| Built-in Microphone | No | - |
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Prices on this page were last checked October 11, 2026 at 4:59 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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The Two Headphones In Full
IKKO OH10: $199.00 IKKO eBay
Pros: In oratory1990’s measurement it earns a preference score of 73 with a smooth 1.9 dB standard deviation, so few frequencies stick out. Bass is lifted about 3 dB from 60 to 200 Hz and sub-bass reaches 20 Hz with a slight boost, giving a warm, full low end for bass lovers. It matches the rating of the Fearless Audio Shangri-la while costing a little less.
Cons: A dip of about 4.5 dB near 6.2 kHz slightly softens the edge of cymbals and consonants. Its 106 dB/mW sensitivity is fine for a phone but less efficient than many in-ears. The Shuoer S12 Pro is rated higher for less money.
Full IKKO OH10 review and specifications →
| Released | 2020 (6 years ago) |
|---|---|
| Back | Closed |
| Built-in Microphone | No |
| Connection | Wired |
| Deviation From Target | 1.94 dB standard deviation |
| Driver Type | Hybrid (1 dynamic + 1 balanced armature) |
| Drivers | 1 x dynamic + 1 x balanced armature |
| Form Factor | In-ear |
| Frequency Response | 20Hz - 40kHz (Manufacturer specified) |
| Harman Preference Score | 73 (measured by oratory1990, via AutoEQ) |
| Impedance | 18 ohms |
| Sensitivity | 106 dB/mW |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+1.3 dB at 30 Hz) |
| Tonal Tilt | -0.63 (negative is warmer, positive brighter) |
EQ preset to match the Harman target
Set a preamp of -4.4 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| Low shelf | 105 Hz | -1.1 dB | 0.70 |
| Peak | 170 Hz | -3.0 dB | 0.93 |
| Peak | 768 Hz | +3.3 dB | 1.01 |
| Peak | 3,004 Hz | -2.4 dB | 0.56 |
| Peak | 6,462 Hz | +4.9 dB | 1.20 |
| High shelf | 10,000 Hz | -5.0 dB | 0.70 |
| Peak | 9,565 Hz | +2.8 dB | 2.87 |
| Peak | 4,023 Hz | -1.6 dB | 6.00 |
| Peak | 3,320 Hz | +1.0 dB | 4.13 |
| Peak | 6,049 Hz | +1.1 dB | 6.00 |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
Tanchjim Fola: $199.99 Amazon eBay
Full Tanchjim Fola review and specifications →
| Released | 2025 (1 year ago) |
|---|---|
| Back | Closed |
| Connection | Wired |
| Deviation From Target | 2.19 dB standard deviation |
| Driver Type | Dynamic |
| Drivers | 1 x dynamic |
| Form Factor | In-ear |
| Frequency Response | 2Hz - 48kHz (Manufacturer specified) |
| Harman Preference Score | 72 (median of 8 squig.link measurements, calibrated to AutoEQ) |
| Impedance | 16 ohms |
| Sensitivity | 126 dB/Vrms |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-4.2 dB at 30 Hz) |
| Tonal Tilt | +0.26 (negative is warmer, positive brighter) |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons