No single best amplifier here. What decides it is what you have to drive, what you need to plug in, and how much of the system you want in one box.
| Area | Better | Why |
|---|
| Power | B | PS Audio Stellar M700 has more power - 350W against 180W into 8 ohms. That is about 2.9dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Grip on hard loads | B | PS Audio Stellar M700 holds up better into a 4-ohm load: its output nearly doubles to 700W, where the other increases strongly. That matters with demanding speakers far more than the 8-ohm figure does. |
| Noise floor | A | Eversolo AMP-F8 is the quieter design on paper - 115dB against 105dB. Audible mainly with sensitive speakers in a quiet room. |
| Analogue inputs | A | Eversolo AMP-F8 takes more analogue sources - 2 against 1. |
| Amplifier class | depends | Eversolo AMP-F8 is Class A/B and PS Audio Stellar M700 is Class D. Class A/B runs warm and is the long-established mainstream choice; Class D runs cool and draws almost nothing at idle. Modern examples of both measure well - judge by the rest of the page. |
| Shelf space | depends | Eversolo AMP-F8 takes up about 22% less shelf area (1028cm² against 1316cm²), and it is 83mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | evenly matched | Priced within a few per cent of each other. |
| Watts per dollar | B | PS Audio Stellar M700 is the cheaper watt - about $5 per watt against $10. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Eversolo AMP-F8 B PS Audio Stellar M700
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?
PS Audio Stellar M700 has the edge on paper, though not by much. The rows marked "depends" are more likely to decide this than the score is. If your speakers are a difficult load - 4 ohms nominal, big woofers, or a sensitivity in the low 80s - PS Audio Stellar M700 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 - PS Audio Stellar M700 has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 180 watts is already more than most people ever use, and the extra 170 watts would be headroom you pay for and never hear - we rate PS Audio Stellar M700 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.