Both are dongles, $140 against $70. This page puts them side by side on the only three things a maker can be held to — power, output impedance and noise — and then asks the question that actually matters: which headphones do they treat differently?
The Tanchjim LUNA reaches 100 dB on 565 of the 567 models here, the Tanchjim Space on 561.
| Specification | Tanchjim LUNA | Tanchjim Space |
|---|---|---|
| Power into 32Ω | 285 mW | 125 mW |
| Power into 150Ω | 80 mW | 27 mW |
| Power into 300Ω | 54 mW | 13 mW |
| Power into 600Ω | 27 mW | 6.7 mW |
| Output impedance | not published | not published |
| Output noise | 1.3 µV | 1.1 µV |
| Price | $140 | $70 |
| Headphones it reaches 100 dB on out of 567 | 565 | 561 |
A figure marked not published is missing from the maker’s own material, which is not the same as being good or bad. Where one of these two publishes a number and the other does not, the comparison on that axis cannot be made at all — and saying so is more useful than guessing.
4 headphones reach 100 dB on the Tanchjim LUNA but not on the Tanchjim Space — Moondrop COSMO, Symphonium Crimson, Symphonium Helios, 1 more.
561 of the 567 models here reach 100 dB on both. That is a power count and nothing more; whether either source suits a given headphone also depends on the two lines above.
Each has a page of its own with every power figure traced to what the maker published and a full headphone list: Tanchjim LUNA and Tanchjim Space. Or put either against your own headphones in the source comparison tool.