The Dunu Glacier is 43Ω at 109.0 dB/mW; the Dunu Vulkan 2 is 35Ω at 113.0 dB/mW. This page covers what they ask of an amplifier, not how they sound.
The Glacier needs 4.0 dB more than the Vulkan 2 to reach the same loudness — 0.13 mW against 0.05 mW.
| Specification | Glacier | Vulkan 2 |
|---|---|---|
| Impedance | 43 Ω | 35 Ω |
| Sensitivity | 109.0 dB/mW | 113.0 dB/mW |
| Sensitivity (voltage) | 122.7 dB/V | 127.6 dB/V |
| Power for 100 dB | 0.13 mW | 0.05 mW |
| Voltage for 100 dB | 74 mV | 42 mV |
| Current for 100 dB | 1.7 mA | 1.2 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 5.38 Ω | 4.38 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 Glacier under the one-eighth rule but not for the Vulkan 2 (Shanling H5).
14 sources stay below the audible-hiss threshold with the Glacier but cross it with the Vulkan 2 (FiiO K11 R2R, Lake People G103-S Mk II, Schiit Valhalla 3, 11 more).
280 of the 280 sources here reach 100 dB on both.
The Glacier is more demanding than 23% of the 567 non-electrostatic models in this database; the Vulkan 2 than 7%.
| dB SPL | Glacier power | Glacier voltage | Vulkan 2 power | Vulkan 2 voltage |
|---|---|---|---|---|
| 80 | 1.3 µW | 7 mV | 0.5 µW | 4 mV |
| 85 | 4.0 µW | 13 mV | 1.6 µW | 7 mV |
| 90 | 0.01 mW | 23 mV | 5.0 µW | 13 mV |
| 95 | 0.04 mW | 41 mV | 0.02 mW | 24 mV |
| 100 | 0.13 mW | 74 mV | 0.05 mW | 42 mV |
| 105 | 0.40 mW | 0.13 V | 0.16 mW | 74 mV |
| Source | Price | Headroom, Glacier | Headroom, Vulkan 2 | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 22.5 dB | 27.4 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 30.7 dB | 35.6 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 27.7 dB | 32.6 dB | 0.6 Ω | 1.0 µV |
Of the 280 sources here, 280 reach 100 dB on both. 55 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 cheapest of the 55 is the JadeAudio JA11, at $20. It leaves 22.5 dB of headroom on the Glacier and 27.4 dB on the Vulkan 2, its output impedance is 0.5 Ω against a one-eighth limit of 5.38 Ω and 4.38 Ω, and its noise figure puts the hiss floor 13 dB and 8 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| Glacier | 5 Hz - 40 kHz | not printed | not printed |
| Vulkan 2 | 5Hz – 40kHz | not printed | not printed |
Dunu prints 5 Hz - 40 kHz for the Glacier and 5Hz – 40kHz for the Vulkan 2.
Neither range has a tolerance printed beside it, so a wider range on one sheet is not deeper bass or more treble.
Not a measurement; maker by maker.
Both have a page of their own. In full: Dunu Glacier and Dunu Vulkan 2. Every figure on this page comes from what Dunu published, or is derived from it — what that maker publishes, counted.