Both are audio interfaces, $3500 against $2499. 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 RME ADI-2 Pro EX reaches 100 dB on 567 of the 567 models here, the Audient Horizon 8P on 566.
| Specification | Audient Horizon 8P | RME ADI-2 Pro EX |
|---|---|---|
| Power into 32Ω | 986 mW | 1.9 W |
| Power into 150Ω | 278 mW | 540 mW |
| Power into 300Ω | 140 mW | 370 mW |
| Power into 600Ω | 71 mW | 185 mW |
| Output impedance | 10 Ω | 0.1 Ω |
| Output noise | not published | not published |
| Price | $3500 | $2499 |
| Headphones it reaches 100 dB on out of 567 | 566 | 567 |
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.
1 headphone reaches 100 dB on the RME ADI-2 Pro EX but not on the Audient Horizon 8P — Symphonium Titan.
510 headphones are left alone by the RME ADI-2 Pro EX under the one-eighth rule but coloured by the Audient Horizon 8P (64 Audio Aspire 1, 64 Audio Fourte, 64 Audio Nio, 507 more).
566 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: Audient Horizon 8P and RME ADI-2 Pro EX. Or put either against your own headphones in the source comparison tool.