The Bang & Olufsen Beoplay H95 is 12Ω at 101.5 dB/mW; the Bang & Olufsen Beoplay H9i is 24Ω at 95.0 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 Beoplay H9i needs 6.5 dB more than the Beoplay H95 to reach the same loudness — 3.2 mW against 0.71 mW.
| Specification | Beoplay H95 | Beoplay H9i |
|---|---|---|
| Impedance | 12 Ω | 24 Ω |
| Sensitivity | 101.5 dB/mW | 95.0 dB/mW |
| Sensitivity (voltage) | 120.7 dB/V | 111.2 dB/V |
| Power for 100 dB | 0.71 mW | 3.2 mW |
| Voltage for 100 dB | 92 mV | 0.28 V |
| Current for 100 dB | 7.7 mA | 11.5 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 1.50 Ω | 3.00 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.
5 sources are low enough in output impedance for the Beoplay H9i under the one-eighth rule but not for the Beoplay H95 (FiiO KA13, Schiit Vali 2+, Astell&Kern HC3, 2 more).
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: Bang & Olufsen Beoplay H95 and Bang & Olufsen Beoplay H9i. Every figure on this page comes from what Bang & Olufsen published, or is derived from it — what that maker publishes, counted.