The Moondrop PARA 2 is 9Ω at 85.5 dB/mW; the Moondrop VENUS is 18Ω at 82.6 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 VENUS needs 2.9 dB more than the PARA 2 to reach the same loudness — 55 mW against 28 mW.
| Specification | PARA 2 | VENUS |
|---|---|---|
| Impedance | 9 Ω | 18 Ω |
| Sensitivity | 85.5 dB/mW | 82.6 dB/mW |
| Sensitivity (voltage) | 106.0 dB/V | 100.0 dB/V |
| Power for 100 dB | 28 mW | 55 mW |
| Voltage for 100 dB | 0.50 V | 0.99 V |
| Current for 100 dB | 56.0 mA | 55.3 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 1.12 Ω | 2.25 Ω |
| Sources that reach 100 dB out of 280 | 223 | 225 |
2 of the 280 sources have the power for the PARA 2 but not for the VENUS — Sony NW-WM1AM2, Sony NW-WM1ZM2.
4 of the 280 sources have the power for the VENUS but not for the PARA 2 — iBasso DC03 Pro, Hidizs S9 Pro, Loxjie A30, 1 more.
11 sources are low enough in output impedance for the VENUS under the one-eighth rule but not for the PARA 2 (FiiO KA13, FiiO K11, Schiit Vali 2+, 8 more).
221 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 PARA 2 and Moondrop VENUS. Every figure on this page comes from what Moondrop published, or is derived from it — what that maker publishes, counted.