The Moondrop Stellaris is 36Ω at 102.6 dB/mW; the Moondrop Void is 64Ω at 98.1 dB/mW. This page is only about what they ask of an amplifier — not how they sound, which no specification on either sheet can tell you.
The Void needs 4.5 dB more than the Stellaris to reach the same loudness — 1.5 mW against 0.55 mW.
| Specification | Stellaris | Void |
|---|---|---|
| Impedance | 36 Ω | 64 Ω |
| Sensitivity | 102.6 dB/mW | 98.1 dB/mW |
| Sensitivity (voltage) | 117.0 dB/V | 110.0 dB/V |
| Power for 100 dB | 0.55 mW | 1.5 mW |
| Voltage for 100 dB | 0.14 V | 0.31 V |
| Current for 100 dB | 3.9 mA | 4.9 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 4.50 Ω | 8.00 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
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.
1 source is low enough in output impedance for the Void under the one-eighth rule but not for the Stellaris (Shanling H5).
280 of the 280 sources here reach 100 dB on both. That count is about power only — the output-impedance and hiss lines above are separate questions, and a source can pass this one and fail those.
Each model has a page of its own with the full source list, the hiss estimate and the provenance of every figure above: Moondrop Stellaris and Moondrop Void. Every figure on this page comes from what Moondrop published, or is derived from it — what that maker publishes, counted.