These are not the same size of amplifier: Accuphase E-280 has roughly 3x the power of Esoteric F-01. That is about 4.8dB, 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 | Accuphase E-280 has more power - 90W against 30W into 8 ohms. That is about 4.8dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate Esoteric F-01 the better fit for desk or near-field listening and a small room, and Accuphase E-280 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 | Esoteric F-01 holds up better into a 4-ohm load: its output nearly doubles to 60W, where the other increases modestly. That matters with demanding speakers far more than the 8-ohm figure does. |
| Bass control | evenly matched | Similar damping factor (500 vs 500). |
| Analogue inputs | A | Esoteric F-01 takes more analogue sources - 7 against 5. |
| Phono stage | depends | Esoteric F-01 has a built-in phono stage (MM and MC) and Accuphase E-280 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. |
| Amplifier class | depends | Esoteric F-01 is Class A and Accuphase E-280 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. |
| Price | B | Accuphase E-280 costs less - $6,995 against $21,000 at list. |
| Watts per dollar | B | Accuphase E-280 is the cheaper watt - about $78 per watt against $700. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Esoteric F-01 B Accuphase E-280
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?
Neither runs away with it - they trade advantages. Let the "depends" rows and the speakers you already own settle it. If your speakers are a difficult load - 4 ohms nominal, big woofers, or a sensitivity in the low 80s - Esoteric F-01 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 - Accuphase E-280 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 60 watts would be headroom you pay for and never hear - we rate Accuphase E-280 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.