Short answer: the Truthear Pure. It ranks #848 of 1291 in-ear headphones by sound quality, rated 3.4/5, at $89.99; the Tangzu Fudu ranks #911, rated 3.3/5, at $89. Close enough in price that the sound-quality gap is the deciding factor.
Why pick 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 tradeoff: 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.
The case for the Tangzu Fudu: Bass is lifted about 2.7 dB with extension to 20 Hz, giving kick drums and bass lines extra weight. The catch: Presence sits about 3.7 dB low with a 5.9 dB dip near 5.9 kHz, so vocals and instruments lose some bite.
Buy the Truthear Pure. It is rated higher for sound quality, and the $0.99 you would save on the Tangzu Fudu does not close the gap.
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Bass and lower mids sit right on target across 37 measurements, so the sound is clean and uncolored with no bloat.
Amazon $89.99 eBay
Bass is lifted about 2.7 dB with extension to 20 Hz, giving kick drums and bass lines extra weight.
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Specifications Side By Side
| Truthear Pure | Tangzu Fudu | |
|---|---|---|
| Price | $89.99 | $89.00 |
| Ranked | #848 of 1291 in In-Ear Headphones | #911 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Hybrid | Hybrid |
| Drivers | 1 x 10mm LCP dynamic + 3 x balanced armature | 1 x 10mm dynamic + 2 x balanced armature |
| Impedance | 13.8 ohms | 16 ohms |
| Sensitivity | 124 dB/Vrms | - |
| Frequency Response | 7Hz - 40kHz (Manufacturer specified) | - |
| Harman Preference Score | 67 (median of 37 squig.link measurements, calibrated to AutoEQ) | 65 (median of 12 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.28 dB standard deviation | 2.41 dB standard deviation |
| Tonal Tilt | -0.56 (negative is warmer, positive brighter) | -0.88 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (-2.3 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (+0.9 dB at 30 Hz) |
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 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; the Tangzu Fudu from bassyalexander, csi-zone, harpo, hbb, ianfann, koi, mmagtech, rg, soundcheck39, soundignity, therollo9 and timmyv, all via squig.link.
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