The Tangzu Li Zhi is 18Ω at 107.5 dB (no reference unit printed); the Tangzu The King Wukong is 22Ω at 112.0 dB (no reference unit printed). This page covers what they ask of an amplifier, not how they sound.
The Li Zhi needs 4.5 dB more than the The King Wukong to reach the same loudness — 0.18 mW against 0.06 mW.
| Specification | Li Zhi | The King Wukong |
|---|---|---|
| Impedance | 18 Ω | 22 Ω |
| Sensitivity | 107.5 dB | 112.0 dB |
| Sensitivity (voltage) | 124.9 dB/V | 128.6 dB/V |
| Power for 100 dB | 0.18 mW | 0.06 mW |
| Voltage for 100 dB | 57 mV | 37 mV |
| Current for 100 dB | 3.1 mA | 1.7 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 2.25 Ω | 2.75 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
One caution before reading the rows. Tangzu Li Zhi and Tangzu The King Wukong printed a decibel figure with no reference unit, so this page reads it as per milliwatt. If it is really per volt, each of them needs far more than the table says. Why the two readings differ by so much.
Every source in the database that drives one of them drives the other. On power, the choice between these two changes nothing about what amplifier you need.
9 sources stay below the audible-hiss threshold with the Li Zhi but cross it with the The King Wukong (Grace Design m900, FiiO M33 R2R, Schiit Lyr 5, 6 more).
280 of the 280 sources here reach 100 dB on both.
The Li Zhi is more demanding than 16% of the 567 non-electrostatic models in this database; the The King Wukong than 5%.
| dB SPL | Li Zhi power | Li Zhi voltage | The King Wukong power | The King Wukong voltage |
|---|---|---|---|---|
| 80 | 1.8 µW | 6 mV | 0.6 µW | 4 mV |
| 85 | 5.6 µW | 10 mV | 2.0 µW | 7 mV |
| 90 | 0.02 mW | 18 mV | 6.3 µW | 12 mV |
| 95 | 0.06 mW | 32 mV | 0.02 mW | 21 mV |
| 100 | 0.18 mW | 57 mV | 0.06 mW | 37 mV |
| 105 | 0.56 mW | 0.10 V | 0.20 mW | 66 mV |
| Source | Price | Headroom, Li Zhi | Headroom, The King Wukong | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 19.8 dB | 25.1 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 31.2 dB | 35.4 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 28.1 dB | 32.3 dB | 0.6 Ω | 1.0 µV |
Of the 280 sources here, 280 reach 100 dB on both. 53 of them also publish an output impedance low enough for both under the one-eighth rule and a noise figure that stays below the audible-hiss threshold with both.
The cheapest of the 53 is the JadeAudio JA11, at $20. It leaves 19.8 dB of headroom on the Li Zhi and 25.1 dB on the The King Wukong, its output impedance is 0.5 Ω against a one-eighth limit of 2.25 Ω and 2.75 Ω, and its noise figure puts the hiss floor 10 dB and 7 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| Li Zhi | 20Hz-20.000kHz | not printed | not printed |
| The King Wukong | 20Hz-20kHz | not printed | not printed |
Tangzu prints 20Hz-20.000kHz for the Li Zhi and 20Hz-20kHz for the The King Wukong.
Li Zhi: Tangzu prints the top of the range as “20.000kHz”. As a decimal point that is 20 kHz; as a thousands separator it would be twenty megahertz. Either way the range it describes is the audible band and nothing beyond it.
Neither range has a tolerance printed beside it, so a wider range on one sheet is not deeper bass or more treble.
Not a measurement; maker by maker.
Both have a page of their own. In full: Tangzu Li Zhi and Tangzu The King Wukong. Each figure on this page is labelled on those pages with where it came from, including the ones Tangzu never published — what that maker publishes, counted.