Both are desktop amplifiers, $370 against $349. This page puts them side by side on the only three things a maker can be held to — power, output impedance and noise — and then asks the question that actually matters: which headphones do they treat differently?
The Geshelli Archel 3S Pro reaches 100 dB on 567 of the 567 models here, the Schiit Valhalla 2 on 561.
| Specification | Geshelli Archel 3S Pro | Schiit Valhalla 2 |
|---|---|---|
| Power into 32Ω | 1.0 W | 115 mW |
| Power into 150Ω | 213 mW | 426 mW |
| Power into 300Ω | 107 mW | 800 mW |
| Power into 600Ω | 53 mW | 450 mW |
| Output impedance | not published | 14.0 Ω |
| Output noise | not published | not published |
| Price | $370 | $349 |
| Headphones it reaches 100 dB on out of 567 | 567 | 561 |
A figure marked not published is missing from the maker’s own material, which is not the same as being good or bad. Where one of these two publishes a number and the other does not, the comparison on that axis cannot be made at all — and saying so is more useful than guessing.
| Load | Geshelli Archel 3S Pro | Schiit Valhalla 2 |
|---|---|---|
| 32 Ω | Derived | Derived |
| 150 Ω | Derived | Derived |
| 300 Ω | Derived | Published |
| 600 Ω | Derived | Published |
Only one of these two columns starts from a power rating. Schiit Valhalla 2 publishes one at 300 Ω and at 600 Ω; Geshelli Archel 3S Pro publishes none at any of these four loads, so its column is worked out from power it published at other loads. Both are arithmetic on a maker’s own figures rather than guesses, and the method used for the Geshelli Archel 3S Pro understates rather than flatters — but at 300 Ω and at 600 Ω are the only loads here at which its maker can be held to a figure.
What each of these labels means, and why a derived figure is still worth printing, is set out in how this data was built.
6 headphones reach 100 dB on the Geshelli Archel 3S Pro but not on the Schiit Valhalla 2 — Moondrop COSMO, Moondrop PARA, Symphonium Crimson, 3 more.
561 of the 567 models here reach 100 dB on both. That is a power count and nothing more; whether either source suits a given headphone also depends on the two lines above.
The counts above say how many models the two treat differently. This says by how much. The same 8 headphones appear on every page of this kind, ordered from the easiest to drive to the hardest, so a row can be read across pages as well as across columns. Headroom is at a 100 dB SPL peak.
The widest gap on the list is the Campfire Audio Andromeda 2020: Geshelli Archel 3S Pro has +25 dB of headroom there against +9 dB. 15 dB is about 35 times the power, which matters for peaks rather than for how loud the music sits.
The hiss columns are empty for Geshelli Archel 3S Pro and Schiit Valhalla 2 because neither maker publishes no output noise figure. That is a gap in the specification, not a quiet amplifier, and it is left blank here rather than filled with a plausible number.
| Headphone | Impedance | Needs | Geshelli Archel 3S Pro headroom | Schiit Valhalla 2 headroom | Geshelli Archel 3S Pro hiss | Schiit Valhalla 2 hiss |
|---|---|---|---|---|---|---|
| Shure SE846 | 9 Ω | 0.04 mW | +45 dB | +29 dB damping | not published | not published |
| Campfire Audio Andromeda 2020 | 9 Ω | 4.0 mW | +25 dB | +9 dB damping | not published | not published |
| Audeze LCD-2 Classic | 70 Ω | 0.79 mW | +28 dB | +25 dB damping | not published | not published |
| Beyerdynamic DT 1990 Pro (250Ω) | 250 Ω | 0.63 mW | +23 dB | +30 dB | not published | not published |
| HiFiMAN HE400se | 25 Ω | 7.9 mW | +22 dB | +11 dB damping | not published | not published |
| Audio-Technica ATH-R70X | 470 Ω | 1.6 mW | +16 dB | +25 dB | not published | not published |
| Sennheiser HD 600 | 300 Ω | 6.6 mW | +12 dB | +21 dB | not published | not published |
| HiFiMAN Susvara | 60 Ω | 50 mW | +10 dB | +6 dB damping | not published | not published |
The Geshelli Archel 3S Pro costs $21 more than the Schiit Valhalla 2. Out of the 567 models here, that difference buys 6 more models driven to 100 dB.
Nothing runs the other way: there is no axis here on which the cheaper of the two does better.
Everything in this paragraph counts only figures the two makers published. An advantage on an axis one of them leaves blank cannot be counted, and is not counted — how often that happens is its own page.
Each has a page of its own with every power figure traced to what the maker published and a full headphone list: Geshelli Archel 3S Pro and Schiit Valhalla 2. Or put either against your own headphones in the source comparison tool.