These are not the same size of amplifier: Arcam A15 has roughly 2.7x the power of Schiit Aegir 2F. That is about 4.3dB, so it is a question of room size and how hard your speakers are to drive, not of one being the better amplifier.
| Area | Better | Why |
|---|
| Power | B | Arcam A15 has more power - 80W against 30W into 8 ohms. That is about 4.3dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate Schiit Aegir 2F the better fit for desk or near-field listening and a small room, and Arcam A15 for a mid-size room, a large room and a very large room. Match the amplifier to the room you actually have, not the one you want. |
| Grip on hard loads | A | Schiit Aegir 2F holds up better into a 4-ohm load: its output increases strongly to 50W, where the other increases strongly. That matters with demanding speakers far more than the 8-ohm figure does. |
| Noise floor | A | Schiit Aegir 2F is the quieter design on paper - 122dB against 106dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Arcam A15 has a DAC on board; the other needs an external one, which is another box, another power lead and another purchase. |
| Analogue inputs | B | Arcam A15 takes more analogue sources - 3 against 2. |
| Phono stage | depends | Arcam A15 has a built-in phono stage (MM) and Schiit Aegir 2F does not. Decisive if you own a turntable, completely irrelevant if you do not - and an outboard phono stage is easy to add later either way. |
| Headphones | depends | Only Arcam A15 has a headphone output. Worth something if you listen late, nothing if you never do. |
| Amplifier class | depends | Schiit Aegir 2F is Class A and Arcam A15 is Class A/B. Class A runs hot and is inefficient by design, in exchange for the simplest signal path; Class A/B runs warm and is the long-established mainstream choice. Modern examples of both measure well - judge by the rest of the page. |
| Shelf space | depends | Schiit Aegir 2F takes up about 52% less shelf area (755cm² against 1580cm²), and it is 34mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | A | Schiit Aegir 2F costs less - $949 against $999 at list. |
| Watts per dollar | B | Arcam A15 is the cheaper watt - about $12 per watt against $32. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Schiit Aegir 2F B Arcam A15
depends neither is better in the abstract - it turns on your room, your system or how you will use them. Only specs published for both amplifiers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
The usual trade-off: Arcam A15 measures better, Schiit Aegir 2F costs about 5% less. With most speakers in most rooms that gap is smaller in practice than it looks here. If your speakers are a difficult load - 4 ohms nominal, big woofers, or a sensitivity in the low 80s - Schiit Aegir 2F is the safer partner, because how an amplifier behaves when the impedance drops matters more than its 8-ohm rating. Start with the room. In a large or open-plan room, or with speakers that are hard to drive - low sensitivity, or an impedance that dips - Arcam A15 has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 30 watts is already more than most people ever use, and the extra 50 watts would be headroom you pay for and never hear - we rate Arcam A15 poorly for near-field use for exactly that reason.
What a spec sheet cannot show: how either sounds with your speakers, how the controls feel day to day, and what the app is like to live with - which is where most all-in-one amplifiers are actually won or lost. Power figures are the manufacturers' own and are not measured to a common standard, so treat small differences as noise. If you can hear both, that will tell you more than any row above.