These are not the same size of amplifier: Arcam SA30 has roughly 2.6x the power of Arcam SA10. That is about 4.1dB, 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 | A | Arcam SA30 has more power - 130W against 50W into 8 ohms. That is about 4.1dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate Arcam SA30 the better fit for a mid-size room, a large room and a very large room, and Arcam SA10 for desk or near-field listening and a small room. Match the amplifier to the room you actually have, not the one you want. |
| Grip on hard loads | B | Arcam SA10 holds up better into a 4-ohm load: its output increases strongly to 85W, where the other increases strongly. That matters with demanding speakers far more than the 8-ohm figure does. |
| Noise floor | A | Arcam SA30 is the quieter design on paper - 112dB against 106dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | A | Both decode on board, but only Arcam SA30 handles MQA. |
| Streaming | A | Only Arcam SA30 has AirPlay 2, Chromecast and Roon. |
| Analogue inputs | evenly matched | The same number of line-level inputs (4). |
| Room to grow | evenly matched | The same expansion options on both. |
| Room correction | A | Arcam SA30 has room correction (Dirac Live). In an awkward room that does more for the sound than any other difference on this page. |
| Amplifier class | depends | Arcam SA30 is Class G and Arcam SA10 is Class A/B. Class G/H switches its supply rails to cut the heat a Class A/B design wastes; 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. |
| Price | B | Arcam SA10 costs less - $880 against $3,300 at list. |
| Watts per dollar | B | Arcam SA10 is the cheaper watt - about $18 per watt against $25. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Arcam SA30 B Arcam SA10
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 SA30 measures better, Arcam SA10 costs about 73% 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 - Arcam SA10 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 SA30 has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 50 watts is already more than most people ever use, and the extra 80 watts would be headroom you pay for and never hear - we rate Arcam SA30 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.