Both are audio interfaces, $599 against $400. 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 Arturia AudioFuse Rev2 reaches 100 dB on 564 of the 567 models here, the IK Multimedia AXE I/O on 561.
| Specification | Arturia AudioFuse Rev2 | IK Multimedia AXE I/O |
|---|---|---|
| Power into 32Ω | 187 mW | 115 mW |
| Power into 150Ω | 40 mW | 60 mW |
| Power into 300Ω | 20 mW | 30 mW |
| Power into 600Ω | 10.0 mW | 15 mW |
| Output impedance | 33 Ω | <0.1 Ω |
| Output noise | not published | not published |
| Price | $599 | $400 |
| Headphones it reaches 100 dB on out of 567 | 564 | 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.
3 headphones reach 100 dB on the Arturia AudioFuse Rev2 but not on the IK Multimedia AXE I/O — Moondrop COSMO, Symphonium Helios, Symphonium Zenith.
545 headphones are left alone by the IK Multimedia AXE I/O under the one-eighth rule but coloured by the Arturia AudioFuse Rev2 (64 Audio Aspire 1, 64 Audio Fourte, 64 Audio Nio, 542 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.
Each has a page of its own with every power figure traced to what the maker published and a full headphone list: Arturia AudioFuse Rev2 and IK Multimedia AXE I/O. Or put either against your own headphones in the source comparison tool.