The Kinera Mimisbrunnr is 43Ω at 88.3 dB/mW; the Kinera Nott Phantom is 54Ω at 105.0 dB (no reference unit printed). This page covers what they ask of an amplifier, not how they sound.
The Mimisbrunnr needs 16.7 dB more than the Nott Phantom to reach the same loudness — 15 mW against 0.32 mW.
| Specification | Mimisbrunnr | Nott Phantom |
|---|---|---|
| Impedance | 43 Ω | 54 Ω |
| Sensitivity | 88.3 dB/mW | 105.0 dB |
| Sensitivity (voltage) | 102.0 dB/V | 117.7 dB/V |
| Power for 100 dB | 15 mW | 0.32 mW |
| Voltage for 100 dB | 0.80 V | 0.13 V |
| Current for 100 dB | 18.5 mA | 2.4 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 5.38 Ω | 6.75 Ω |
| Sources that reach 100 dB out of 280 | 277 | 280 |
One caution before reading the rows. Kinera Nott Phantom printed a decibel figure with no reference unit, so this page reads it as per milliwatt. If it is really per volt, that model needs far more than the table says. Why the two readings differ by so much.
3 of the 280 sources have the power for the Nott Phantom but not for the Mimisbrunnr — Apple USB-C dongle (EU), Steinberg UR22C, Sony NW-A306.
1 source stays below the audible-hiss threshold with the Mimisbrunnr but crosses it with the Nott Phantom (Schiit Mjolnir 3).
277 of the 280 sources here reach 100 dB on both.
The Mimisbrunnr is more demanding than 96% of the 567 non-electrostatic models in this database; the Nott Phantom than 42%.
| dB SPL | Mimisbrunnr power | Mimisbrunnr voltage | Nott Phantom power | Nott Phantom voltage |
|---|---|---|---|---|
| 80 | 0.15 mW | 80 mV | 3.2 µW | 13 mV |
| 85 | 0.47 mW | 0.14 V | 0.01 mW | 23 mV |
| 90 | 1.5 mW | 0.25 V | 0.03 mW | 41 mV |
| 95 | 4.7 mW | 0.45 V | 0.10 mW | 73 mV |
| 100 | 15 mW | 0.80 V | 0.32 mW | 0.13 V |
| 105 | 47 mW | 1.42 V | 1.0 mW | 0.23 V |
| Source | Price | Headroom, Mimisbrunnr | Headroom, Nott Phantom | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 1.8 dB | 17.5 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 10.0 dB | 25.7 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR11 | $36 | 1.8 dB | 17.5 dB | 0.5 Ω | 8.0 µV |
Of the 280 sources here, 277 reach 100 dB on both. 69 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 69 is the JadeAudio JA11, at $20. It leaves 1.8 dB of headroom on the Mimisbrunnr and 17.5 dB on the Nott Phantom, its output impedance is 0.5 Ω against a one-eighth limit of 5.38 Ω and 6.75 Ω, and its noise figure puts the hiss floor 33 dB and 18 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| Mimisbrunnr | 20Hz – 40kHz | not printed | not printed |
| Nott Phantom | 20Hz - 20kHz full-range | not printed | not printed |
Kinera prints 20Hz – 40kHz for the Mimisbrunnr and 20Hz - 20kHz full-range for the Nott Phantom.
Nott Phantom: The word “full-range” is inside the value, not beside it: Kinera prints it in the same cell as the numbers.
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: Kinera Mimisbrunnr and Kinera Nott Phantom. Each figure on this page is labelled on those pages with where it came from, including the ones Kinera never published — what that maker publishes, counted.