Short answer: the Truthear Pure. Both are rated 3.4/5 for sound quality (#848 and #881 of 1291 in-ear headphones), and the Truthear Pure costs $89.99 against $99.99 for the FiiO FP3, so with nothing between them on sound quality, price settles it.
Why pick the FiiO FP3: Its 14.5mm planar magnetic driver reaches a Harman preference score of 65.8 across six hobbyist measurements on squig.link, with sub-bass held within about half a dB of target so deep bass is present but not exaggerated. The catch: The treble is uneven, with a 6.7 dB peak near 7.9 kHz followed by a 5.7 dB dip near 10.2 kHz, so cymbals can sound sharp and then lose sparkle.
The case for the Truthear Pure: Bass and lower mids sit right on target across 37 measurements, so the sound is clean and uncolored with no bloat. The catch: The sound is subdued up top: the 1 to 3 kHz region is about 3 dB low and presence about 5.5 dB low, with a 6.3 dB dip near 6.3 kHz, so vocals sound recessed and treble lacks detail.
Buy the Truthear Pure. Both are rated the same for sound quality, and it costs $10 less than the FiiO FP3.
Still deciding? The full Headphones rankings cover every ranked option.
Its 14.5mm planar magnetic driver reaches a Harman preference score of 65.8 across six hobbyist measurements on squig.link, with sub-bass held within about half a dB of target so deep bass is present but not exaggerated.
Amazon $99.99 eBay
Bass and lower mids sit right on target across 37 measurements, so the sound is clean and uncolored with no bloat.
Amazon $89.99 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
| FiiO FP3 | Truthear Pure | |
|---|---|---|
| Price | $99.99 | $89.99 |
| Ranked | #881 of 1291 in In-Ear Headphones | #848 of 1291 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) | 67 (median of 37 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.72 dB standard deviation | 2.28 dB standard deviation |
| Tonal Tilt | -0.28 (negative is warmer, positive brighter) | -0.56 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.4 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-2.3 dB at 30 Hz) |
| Connection | Wired | Wired |
| Driver Type | Planar magnetic | Hybrid |
| Drivers | 1 x 14.5mm planar magnetic | 1 x 10mm LCP dynamic + 3 x balanced armature |
| Impedance | 36 ohms | 13.8 ohms |
| Sensitivity | 105 dB/mW | 124 dB/Vrms |
| Weight | 0 lbs (6.5 g) per earpiece | - |
| Frequency Response | 10Hz - 40kHz (Manufacturer specified) | 7Hz - 40kHz (Manufacturer specified) |
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 FiiO FP3 from atechreviews, audioamigo, dchpgall, jaytiss, koi and practiphile; the Truthear Pure from aden, aftersound, aquaphobic, arn, atechreviews, audioamigo, banzai1122, bassaudio, bedrock, bloomaudio, boizoff, breampike, csi-zone, dl, doltonius, fernandagunsan, filk, flare, hobbytalk, hu-fi, iemocean, iemworld, jaytiss, koi, kr0mka, lestat, listener, lown-fi, practiphile, recode, soundignity, superreview, suporsalad, theaudiostore, timmyv, treblewellxtended, vortexreviews and zerostresslevel, all via squig.link.
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