Both are dongles, $29 against $79. 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 FiiO KA11 reaches 100 dB on 566 of the 567 models here, the FiiO KA13 on 555.
| Specification | FiiO KA11 | FiiO KA13 |
|---|---|---|
| Power into 32Ω | 200 mW | 50 mW |
| Power into 150Ω | 43 mW | 10 mW |
| Power into 300Ω | 22 mW | 5.0 mW |
| Power into 600Ω | 11 mW | 2.5 mW |
| Output impedance | 0.7 Ω | 1.7 Ω |
| Output noise | 1.7 µV | 2.5 µV |
| Price | $29 | $79 |
| Headphones it reaches 100 dB on out of 567 | 566 | 555 |
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.
11 headphones reach 100 dB on the FiiO KA11 but not on the FiiO KA13 — Beyerdynamic DT 880 Edition (600Ω), Beyerdynamic DT 990 Edition (600Ω), HiFiMAN HE-6se V2, 8 more.
63 headphones are left alone by the FiiO KA11 under the one-eighth rule but coloured by the FiiO KA13 (64 Audio Aspire 1, 64 Audio Fourte, 64 Audio Nio, 60 more).
8 headphones stay below the audible-hiss threshold on the FiiO KA11 but cross it on the FiiO KA13 (64 Audio Fourte, Campfire Audio Andromeda 10, Campfire Audio Andromeda 2023, 5 more).
555 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: FiiO KA11 and FiiO KA13. Or put either against your own headphones in the source comparison tool.