One is a streaming all-in-one and the other is an amplifier. Judge them on how many boxes you want and what you already own, not on the spec sheet alone.
| Area | Better | Why |
|---|
| Power | A | WiiM Amp Pro has more power - 60W against 35W into 8 ohms. That is about 2.3dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate WiiM Amp Pro the better fit for a very large room, and Cambridge Audio AXA35 for desk or near-field listening. Match the amplifier to the room you actually have, not the one you want. |
| Speaker load rating | A | WiiM Amp Pro is rated down to 4 ohms against 8, so it is the safer partner for a low-impedance speaker. |
| Noise floor | A | WiiM Amp Pro is the quieter design on paper - 105dB against 82dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | A | WiiM Amp Pro has a DAC on board; the other needs an external one, which is another box, another power lead and another purchase. |
| Streaming | A | Only WiiM Amp Pro has Chromecast and Roon. |
| Phono stage | depends | Cambridge Audio AXA35 has a built-in phono stage (MM,MC) and WiiM Amp Pro 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. |
| Room to grow | A | Only WiiM Amp Pro offers preamp outputs - which decides whether you can add a subwoofer or a power amplifier later without replacing the box. |
| Amplifier class | depends | WiiM Amp Pro is Class D and Cambridge Audio AXA35 is Class A/B. Class D runs cool and draws almost nothing at idle; 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 | WiiM Amp Pro takes up about 74% less shelf area (420cm² against 1598cm²), and it is 150mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | A | WiiM Amp Pro costs less - $379 against $399 at list. |
| Watts per dollar | A | WiiM Amp Pro is the cheaper watt - about $6 per watt against $11. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A WiiM Amp Pro B Cambridge Audio AXA35
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?
WiiM Amp Pro has the edge on paper, though not by much. The rows marked "depends" are more likely to decide this than the score is. 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 - WiiM Amp Pro has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 35 watts is already more than most people ever use, and the extra 25 watts would be headroom you pay for and never hear. If you play records, Cambridge Audio AXA35 saves you buying a phono stage; if you do not, ignore that row entirely.
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.