The Abyss Diana MR is 30Ω at 93.0 dB/mW; the Abyss Diana V2 is 42Ω at 91.0 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 Diana V2 needs 2.0 dB more than the Diana MR to reach the same loudness — 7.9 mW against 5.0 mW.
| Specification | Diana MR | Diana V2 |
|---|---|---|
| Impedance | 30 Ω | 42 Ω |
| Sensitivity | 93.0 dB/mW | 91.0 dB/mW |
| Sensitivity (voltage) | 108.2 dB/V | 104.8 dB/V |
| Power for 100 dB | 5.0 mW | 7.9 mW |
| Voltage for 100 dB | 0.39 V | 0.58 V |
| Current for 100 dB | 12.9 mA | 13.8 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 3.75 Ω | 5.25 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 Diana V2 under the one-eighth rule but not for the Diana MR (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: Abyss Diana MR and Abyss Diana V2. Every figure on this page comes from what Abyss published, or is derived from it — what that maker publishes, counted.