The Dan Clark Audio Ether C Flow 1.1 is 23Ω at 94.0 dB (no figure from the maker at all); 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 Stealth needs 4.0 dB more than the Ether C Flow 1.1 to reach the same loudness — 10 mW against 4.0 mW.
| Specification | Ether C Flow 1.1 | Stealth |
|---|---|---|
| Impedance | 23 Ω | 23 Ω |
| Sensitivity | 94.0 dB | 90.0 dB/mW |
| Sensitivity (voltage) | 110.4 dB/V | 106.4 dB/V |
| Power for 100 dB | 4.0 mW | 10 mW |
| Voltage for 100 dB | 0.30 V | 0.48 V |
| Current for 100 dB | 13.2 mA | 20.9 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 2.88 Ω | 2.88 Ω |
| Sources that reach 100 dB out of 280 | 280 | 279 |
One caution before reading the rows. For Dan Clark Audio Ether C Flow 1.1 the maker publishes no sensitivity figure at all. The number in the table was collected when this database was first built and has never been traced to a manufacturer document, so treat every row below it as an estimate rather than a specification.
1 of the 280 sources has the power for the Ether C Flow 1.1 but not for the 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: Dan Clark Audio Ether C Flow 1.1 and Dan Clark Audio Stealth. Each figure on this page is labelled on those pages with where it came from, including the ones Dan Clark Audio never published — what that maker publishes, counted.