On power: 58 of the 65 audio interfaces here reach 100 dB SPL on the Dan Clark Audio AEON 2 Closed. It needs 10 mW at its 13Ω, and 7 of them do not get there.
Power is one of three questions and the one that goes wrong least often. The other two — whether the source’s output impedance leaves the frequency response alone, and whether you will hear its noise floor — are answered further down, separately, because a source can pass one and fail another.
The 7 that fall short are Zoom AMS-22, Audient EVO 4, Steinberg UR22C, Tascam US-2x2HR, 3 more. The closest of them, the Audient EVO 4, delivers 9.7 mW into 13Ω against the 10 mW needed — 0.1 dB short.
The cheapest one that does reach it is the Steinberg IXO22 at $119, which delivers 13 mW into 13Ω — 1 dB of headroom over the 10 mW this headphone needs for 100 dB SPL.
100 dB SPL is a peak level, not a listening level. If you listen at 85 dB the same headphone needs 0.32 mW, which is 15 dB less, and the answer above changes for most of the category. The model page has the full ladder.
Under the one-eighth rule the Dan Clark Audio AEON 2 Closed wants a source below 1.62Ω. Of the 43 audio interfaces here that publish an output impedance, 13 are under it and 30 are not.
The furthest over is the Tascam US-2x2HR at 66Ω, which is 41× the ceiling. Above that threshold the source stops being a volume control and starts being part of the frequency response. The simulator shows what that looks like.
The other 22 publish nothing at all on this, so they are not on either side of that count. This site leaves them blank rather than assuming a figure.
Hiss depends on the source’s own noise floor and on how sensitive the headphone is. At 90.0 dB/mW and 13Ω, the Dan Clark Audio AEON 2 Closed turns one microvolt of source noise into about -11 dB SPL — and the threshold where that stops being noticeable in a quiet room is around 20 dB SPL.
Of the 4 audio interfaces here that publish a noise figure, 4 stay below that threshold with this headphone and 0 cross it.
The remaining 61 publish no noise figure, so they cannot be placed on either side.
| Source | Price | Into 13 Ω | Headroom | Output impedance | Hiss in these |
|---|---|---|---|---|---|
| RME ADI-2 DAC FS | $1399 | 764 mW | 18.8 dB | 0.1 Ω | -4 dB SPL |
| RME ADI-2 Pro FS R | $2199 | 1.2 W | 20.8 dB | 0.1 Ω | -4 dB SPL |
| RME ADI-2 Pro EX | $2499 | 1.7 W | 22.3 dB | 0.1 Ω | -4 dB SPL |
4 of the 65 audio interfaces here publish all three figures. 3 of those clear all three for the Dan Clark Audio AEON 2 Closed, and the cheapest is the RME ADI-2 DAC FS at $1399.
It delivers 764 mW into 13 Ω where this headphone needs 10 mW for 100 dB — 18.8 dB of headroom — its output impedance of 0.1 Ω sits under the one-eighth ceiling of 1.62 Ω, and its 2.18 µV of noise leaves the hiss 24 dB under the 20 dB SPL threshold this site uses.
Cheapest that satisfies three published numbers is not the same as best, and the sources left out of this count are left out for want of a published figure, not for failing one. How often that happens is its own page.
| Source | Price | Into 13Ω | Output impedance | Hiss in these | Power verdict |
|---|---|---|---|---|---|
| MOTU M2 | $219 | 135 mW | not published | not published | Comfortable |
| SSL 2 MkII | $229 | 152 mW | 1 Ω | not published | Comfortable |
| MOTU M4 | $279 | 135 mW | not published | not published | Comfortable |
| SSL 2 Plus MkII | $299 | 152 mW | 1 Ω | not published | Comfortable |
| MOTU M6 | $499 | 135 mW | not published | not published | Comfortable |
| SSL 12 | $599 | 481 mW | 1 Ω | not published | Comfortable |
| Apogee Duet 3 | $649 | 481 mW | 0.5 Ω | not published | Comfortable |
| MOTU UltraLite-mk5 | $699 | 191 mW | 1 Ω | not published | Comfortable |
| RME ADI-2 DAC FS | $1399 | 764 mW | 0.1 Ω | -4 dB SPL | Comfortable |
| Apogee Symphony Desktop | $1495 | 225 mW | not published | not published | Comfortable |
| RME ADI-2 Pro FS R | $2199 | 1.2 W | 0.1 Ω | -4 dB SPL | Comfortable |
| RME ADI-2 Pro EX | $2499 | 1.7 W | 0.1 Ω | -4 dB SPL | Comfortable |
Sorted by how many of the three questions the source answers well, then by price. A blank in a column is a blank in the manufacturer’s own documentation, not a zero.
The Dan Clark Audio AEON 2 Closed on other categories: USB dongles · portable players · desktop amplifiers · desktop DAC/amps.
The Dan Clark Audio AEON 2 Closed page has every source in the database against this headphone, and the matcher takes your own numbers.