The Dan Clark Audio AEON RT is 13Ω at 90.0 dB/mW; the Dan Clark Audio Ether C Flow 1.1 is 23Ω at 94.0 dB (no figure from the maker at all). 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 AEON RT needs 4.0 dB more than the Ether C Flow 1.1 to reach the same loudness — 10 mW against 4.0 mW.
| Specification | AEON RT | Ether C Flow 1.1 |
|---|---|---|
| Impedance | 13 Ω | 23 Ω |
| Sensitivity | 90.0 dB/mW | 94.0 dB |
| Sensitivity (voltage) | 108.9 dB/V | 110.4 dB/V |
| Power for 100 dB | 10 mW | 4.0 mW |
| Voltage for 100 dB | 0.36 V | 0.30 V |
| Current for 100 dB | 27.7 mA | 13.2 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 1.62 Ω | 2.88 Ω |
| Sources that reach 100 dB out of 280 | 272 | 280 |
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.
8 of the 280 sources have the power for the Ether C Flow 1.1 but not for the AEON RT — Apple USB-C dongle (EU), Zoom AMS-22, Audient EVO 4, 5 more.
5 sources are low enough in output impedance for the Ether C Flow 1.1 under the one-eighth rule but not for the AEON RT (FiiO KA13, Schiit Vali 2+, Astell&Kern HC3, 2 more).
272 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 AEON RT and Dan Clark Audio Ether C Flow 1.1. 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.