The Sivga Oriole is 32Ω at 108.0 dB (no reference unit printed); the Sivga P-II is 32Ω at 98.0 dB (no reference unit printed). 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 P-II needs 10.0 dB more than the Oriole to reach the same loudness — 1.6 mW against 0.16 mW.
| Specification | Oriole | P-II |
|---|---|---|
| Impedance | 32 Ω | 32 Ω |
| Sensitivity | 108.0 dB | 98.0 dB |
| Sensitivity (voltage) | 122.9 dB/V | 112.9 dB/V |
| Power for 100 dB | 0.16 mW | 1.6 mW |
| Voltage for 100 dB | 71 mV | 0.23 V |
| Current for 100 dB | 2.2 mA | 7.0 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 4.00 Ω | 4.00 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
One caution before reading the rows. Sivga Oriole and Sivga P-II printed a decibel figure with no reference unit, so this page reads it as per milliwatt. If it is really per volt, each of them needs far more than the table says. Why the two readings differ by so much.
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.
3 sources stay below the audible-hiss threshold with the P-II but cross it with the Oriole (FiiO BTR11, FiiO K11 R2R, Rupert Neve RNHP).
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.
The gap between these two in decibels does not change with volume — it is a property of the two headphones. What changes is the size of the numbers, and it changes fast: every 10 dB costs ten times the power. The row that matters is the one nearest the level you listen at, and for most people that is nearer the top of this table than the bottom.
The P-II is more demanding than 63% of the 567 non-electrostatic models in this database; the Oriole than 23%. Both figures use the same measure as the rest of the site: whichever runs out first against a 2 V, 100 mW dongle, voltage or power.
| dB SPL | Oriole power | Oriole voltage | P-II power | P-II voltage |
|---|---|---|---|---|
| 80 | 1.6 µW | 7 mV | 0.02 mW | 23 mV |
| 85 | 5.0 µW | 13 mV | 0.05 mW | 40 mV |
| 90 | 0.02 mW | 23 mV | 0.16 mW | 71 mV |
| 95 | 0.05 mW | 40 mV | 0.50 mW | 0.13 V |
| 100 | 0.16 mW | 71 mV | 1.6 mW | 0.23 V |
| 105 | 0.50 mW | 0.13 V | 5.0 mW | 0.40 V |
105 dB is included because forum power figures are usually quoted there or higher. It is also a level that damages hearing in minutes — how many minutes is its own calculator.
| Source | Price | Headroom, Oriole | Headroom, P-II | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 22.8 dB | 12.8 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 31.0 dB | 21.0 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 28.0 dB | 18.0 dB | 0.6 Ω | 1.0 µV |
Of the 280 sources here, 280 reach 100 dB on both. That is the easy axis. 66 of them also publish an output impedance low enough for both under the one-eighth rule and a noise figure that stays below the audible-hiss threshold with both — the rest either fail one of those or never printed the number at all, and 208 of them are in the second group.
The cheapest of the 66 is the JadeAudio JA11, at $20. It leaves 22.8 dB of headroom on the Oriole and 12.8 dB on the P-II, its output impedance is 0.5 Ω against a one-eighth limit of 4.00 Ω for both, and its noise figure puts the hiss floor 12 dB and 22 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
Cheapest that satisfies three published numbers is not the same as best, and none of it is about how either headphone sounds. To put either model against a source this page does not mention, or to change the target loudness, use the amplifier matcher.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| Oriole | 20Hz - 20KHz | not printed | not printed |
| P-II | nothing printed | — | — |
Sivga prints 20Hz - 20KHz for the Oriole and nothing at all for the P-II.
P-II: Sivga’s page for the P-II has a SPECIFICATION block with four tabs — description, introduction, parameters, packaging — and the parameters tab is empty. Their pages for other models fill that same tab with a table that includes a frequency response; this one has nothing in it.
So one side of this comparison has a frequency-response number and the other does not — which changes less than it looks. The range printed for the Oriole comes with no tolerance beside it, and a range without a ±dB figure says nothing about how loud the headphone is at either end of it: thirty decibels down at the bottom and the sentence would still be true. On the only reading that would have made it a specification, the two sheets say the same amount: nothing.
None of this is a measurement. What each maker publishes, and what it is worth, is set out in the frequency response audit.
Each model has a page of its own with the full source list, the hiss estimate and the provenance of every figure above: Sivga Oriole and Sivga P-II. Each figure on this page is labelled on those pages with where it came from, including the ones Sivga never published — what that maker publishes, counted.