This page does not review anything Tanchjim makes. It counts one thing: how much of what this database says about their products came out of their own documents, and how much had to be worked out or left blank.
| Model | Impedance | Sensitivity | Source of the figure |
|---|---|---|---|
| EA FORCE | 17 Ω | 120.0 dB | Unit not stated |
| FOLA | 16 Ω | 108.0 dB/mW | Converted from per volt |
| NORA | 16 Ω | 107.0 dB/mW | Converted from per volt |
| OLA II | 30 Ω | 105.8 dB/mW | Converted from per volt |
| ORIGIN (Lost Manor) | 16 Ω | 106.0 dB/mW | Converted from per volt |
| SODA | 15.5 Ω | 101.9 dB/mW | Converted from per volt |
Impedance is almost always printed. Sensitivity is the one that goes wrong, because a decibel figure means two very different things depending on whether it is per milliwatt or per volt — about five decibels apart at 300 Ω and eighteen at 16 Ω. The conversion is here.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| EA FORCE | 8-48 kHZ | not printed | not printed |
| FOLA | 2-48 kHZ | not printed | not printed |
| NORA | 2-48 kHZ | not printed | not printed |
| OLA II | 8-48 kHZ | not printed | not printed |
| ORIGIN (Lost Manor) | 2-48KHZ | not printed | not printed |
| SODA | 8-48 kHZ | not printed | not printed |
Tanchjim prints a frequency range for all 6 models here whose sheets have been read.
Not one of those ranges comes with a tolerance in decibels. Without a ±dB figure a range says nothing about how loud the headphone is at either end of it, which puts Tanchjim with the majority: of the 490 models across this database whose maker prints a range, 58 print the tolerance.
Every range stands under the same heading: “频响范围”.
No measurement is published here — only what was printed. The whole count, maker by maker, is in the frequency response audit.
The hardest of the 6 to drive is the Tanchjim SODA: 0.65 mW and 0.10 V for a 100 dB SPL peak. Their impedances run from 15.5 to 30 Ω, which matters because the voltage a headphone wants rises with impedance while the power falls.
280 of the 280 sources here reach 100 dB on all 6, and the cheapest of them is the Apple USB-C dongle (EU) at $9. “Reaches” means the maker’s own published power figure is enough at that load; it is not a judgement of how it sounds.
On hiss the count is smaller, because most of the industry does not publish a noise figure at all: of the 83 sources here that do, 15 stay under the threshold of hearing on all 6 of their in-ears. The one to watch is the Tanchjim EA FORCE at 138 dB/V — the more sensitive the in-ear, the more of the amplifier’s own noise you hear.
Their lowest impedance is the Tanchjim SODA at 15.5 Ω, so a source wants an output impedance at or below 1.9 Ω to satisfy the one-eighth rule on everything they make. 131 of the 169 sources that publish an output impedance manage that.
These counts use figures the source makers published themselves. A product that publishes nothing is not counted as a pass anywhere above, which is why the three numbers differ so much. The collection matcher runs the same arithmetic over whatever you actually own.
| Product | Into 32Ω | Output impedance | Output noise |
|---|---|---|---|
| Tanchjim Stargate II | 75 mW | not published | not published |
| Tanchjim Space | 125 mW | not published | 1.1 µV |
| Tanchjim LUNA | 285 mW | not published | 1.3 µV |
Power decides whether it gets loud enough, output impedance decides whether it tilts the response of a multi-driver in-ear, and the noise figure decides whether you hear hiss with sensitive ones. All three fit on one line of a spec sheet; most of the industry prints one of them.
Tanchjim publishes a power figure at a stated load on 3 of 3, output impedance on 0, a noise figure on 2. Of the 12 power figures this site displays for them at 32, 150, 300 and 600 Ω: 3 printed by Tanchjim at that exact load, 9 worked out by holding output voltage steady across loads.
Most of what this site says about Tanchjim came from them, with the rest derived and labelled as derived.
The rule used here is the same for every maker and is described on the manufacturer index. Every figure behind it can be opened on the product page it came from, with the document it came from linked.