On power, yes — all of them. Every one of the 69 desktop amplifiers in this database reaches 100 dB SPL on the AKG K371, which needs 1.2 mW at its 32Ω.
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 cheapest one that does reach it is the JDS Labs Atom+ (2nd gen) at $99, which delivers 1.0 W into 32Ω — 29 dB of headroom over the 1.2 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 0.04 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 AKG K371 wants a source below 4.00Ω. Of the 49 desktop amplifiers here that publish an output impedance, 45 are under it and 4 are not.
The furthest over is the Bottlehead Crack (OTL kit) at 120Ω, which is 30× 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 20 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 99.1 dB/mW and 32Ω, the AKG K371 turns one microvolt of source noise into about -6 dB SPL — and the threshold where that stops being noticeable in a quiet room is around 20 dB SPL.
Of the 28 desktop amplifiers here that publish a noise figure, 27 stay below that threshold with this headphone and 1 cross it.
The worst of them is the Schiit Mjolnir 3, whose published 25.18 µV works out to 22 dB SPL of hiss in these. The hiss calculator takes your own figures.
The remaining 41 publish no noise figure, so they cannot be placed on either side.
| Source | Price | Into 32 Ω | Headroom | Output impedance | Hiss in these |
|---|---|---|---|---|---|
| JDS Labs Atom+ (2nd gen) | $99 | 1.0 W | 29.1 dB | 0.7 Ω | 0 dB SPL |
| Schiit Magni Unity | $119 | 2.5 W | 33.1 dB | 0.1 Ω | -2 dB SPL |
| JDS Labs Atom Amp 2 | $129 | 2.6 W | 33.3 dB | 0.7 Ω | -3 dB SPL |
27 of the 69 desktop amplifiers here publish all three figures. 25 of those clear all three for the AKG K371, and the cheapest is the JDS Labs Atom+ (2nd gen) at $99.
It delivers 1.0 W into 32 Ω where this headphone needs 1.2 mW for 100 dB — 29.1 dB of headroom — its output impedance of 0.7 Ω sits under the one-eighth ceiling of 4.00 Ω, and its 1.99 µV of noise leaves the hiss 20 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 32Ω | Output impedance | Hiss in these | Power verdict |
|---|---|---|---|---|---|
| JDS Labs Atom+ (2nd gen) | $99 | 1.0 W | 0.7 Ω | 0 dB SPL | Comfortable |
| Schiit Magni Heresy | $99 | 2.4 W | 0.25 Ω | not published | Comfortable |
| Fosi Audio SK02 | $100 | 190 mW | not published | 5 dB SPL | Comfortable |
| Schiit Magni+ | $109 | 2.0 W | not published | not published | Comfortable |
| Schiit Magni Unity | $119 | 2.5 W | 0.1 Ω | -2 dB SPL | Comfortable |
| JDS Labs Atom Amp 2 | $129 | 2.6 W | 0.7 Ω | -3 dB SPL | Comfortable |
| Schiit Vali 2+ | $149 | 1.5 W | 1.8 Ω | not published | Comfortable |
| Schiit Vali 3 | $149 | 1.5 W | 0.5 Ω | 3 dB SPL | Comfortable |
| Topping L30 II | $149 | 2.7 W | 0.1 Ω | -16 dB SPL | Comfortable |
| PreSonus HP4 | $150 | 69 mW | not published | not published | Comfortable |
| SMSL HO100 | $160 | 1.5 W | <0.1 Ω | -4 dB SPL | Comfortable |
| xDuoo MT-604 | $169 | 2.0 W | not published | not published | 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 AKG K371 on other categories: portable players · desktop DAC/amps · audio interfaces.
The AKG K371 page has every source in the database against this headphone, and the matcher takes your own numbers.