The Audeze MM-500 is 18Ω at 100.0 dB/mW; the Dan Clark Audio Stealth is 23Ω at 90.0 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 Dan Clark Audio Stealth needs 10.0 dB more than the Audeze MM-500 to reach the same loudness — 10 mW against 1.0 mW.
| Specification | Audeze MM-500 | Dan Clark Audio Stealth |
|---|---|---|
| Impedance | 18 Ω | 23 Ω |
| Sensitivity | 100.0 dB/mW | 90.0 dB/mW |
| Sensitivity (voltage) | 117.4 dB/V | 106.4 dB/V |
| Power for 100 dB | 1.0 mW | 10 mW |
| Voltage for 100 dB | 0.13 V | 0.48 V |
| Current for 100 dB | 7.5 mA | 20.9 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 2.25 Ω | 2.88 Ω |
| Sources that reach 100 dB out of 280 | 280 | 279 |
1 of the 280 sources has the power for the Audeze MM-500 but not for the Dan Clark Audio Stealth — Steinberg UR22C.
279 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: Audeze MM-500 and Dan Clark Audio Stealth. Every figure on this page comes from what Audeze and Dan Clark Audio published, or is derived from it — what Audeze publishes and what Dan Clark Audio publishes, both counted.