Short answer: the Tangzu Li Zhi. Both are rated 3.3/5 for sound quality (#923 and #911 of 1291 in-ear headphones), and the Tangzu Li Zhi costs $79 against $89 for the Tangzu Fudu, so with nothing between them on sound quality, price settles it.
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.
What the Tangzu Li Zhi does well: A broadly balanced tuning with a preference score of 65 against the Harman target. The tradeoff: Treble about 3 dB below target from 3 to 10 kHz, which can sound dull or veiled next to brighter headphones.
Buy the Tangzu Li Zhi. Both are rated the same for sound quality, and it costs $10 less than the Tangzu Fudu.
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Bass is lifted about 2.7 dB with extension to 20 Hz, giving kick drums and bass lines extra weight.
Amazon $89.00 eBay
A broadly balanced tuning with a preference score of 65 against the Harman target.
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Specifications Side By Side
| Tangzu Fudu | Tangzu Li Zhi | |
|---|---|---|
| Price | $89.00 | 79.00 |
| Ranked | #911 of 1291 in In-Ear Headphones | #923 of 1291 in In-Ear Headphones |
| Form Factor | In-ear | In-ear |
| Back | Closed | Closed |
| Connection | Wired | Wired |
| Driver Type | Hybrid | Dynamic |
| Drivers | 1 x 10mm dynamic + 2 x balanced armature | 1 x 10mm CVD diamond crystal evaporated diaphragm dynamic driver |
| Impedance | 16 ohms | 18 ohms |
| Harman Preference Score | 65 (median of 12 squig.link measurements, calibrated to AutoEQ) | 65 (median of 5 squig.link measurements, calibrated to AutoEQ) |
| Deviation From Target | 2.41 dB standard deviation | 2.38 dB standard deviation |
| Tonal Tilt | -0.88 (negative is warmer, positive brighter) | -0.81 (negative is warmer, positive brighter) |
| Sub-bass Extension | Within 6 dB of target down to 20 Hz (+0.9 dB at 30 Hz) | Within 6 dB of target down to 20 Hz (-1.2 dB at 30 Hz) |
| Sensitivity | - | 107.5 dB |
| Frequency Response | - | 20Hz - 20,000Hz |
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 Tangzu Fudu from bassyalexander, csi-zone, harpo, hbb, ianfann, koi, mmagtech, rg, soundcheck39, soundignity, therollo9 and timmyv; the Tangzu Li Zhi from bassaudio, csi-zone, dl, soundcheck39 and soundignity, all via squig.link.
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