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 | B | Marantz Model 40n has more power - 70W against 40W into 8 ohms. That is about 2.4dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate ELAC DS-A101-G the better fit for desk or near-field listening and a small room, and Marantz Model 40n 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 | ELAC DS-A101-G holds up better into a 4-ohm load: its output nearly doubles to 80W, where the other increases modestly. That matters with demanding speakers far more than the 8-ohm figure does. |
| Noise floor | B | Marantz Model 40n is the quieter design on paper - 106dB against 101dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | evenly matched | Both have a DAC on board with much the same capability. |
| Streaming | B | Only Marantz Model 40n has AirPlay 2 and HEOS. |
| Analogue inputs | B | Marantz Model 40n takes more analogue sources - 3 against 2. |
| Phono stage | depends | Marantz Model 40n has a built-in phono stage (MM) and ELAC DS-A101-G 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 | evenly matched | The same expansion options on both. |
| Headphones | depends | Only Marantz Model 40n has a headphone output. Worth something if you listen late, nothing if you never do. |
| Shelf space | depends | ELAC DS-A101-G takes up about 65% less shelf area (746cm² against 2126cm²), and it is 134mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | A | ELAC DS-A101-G costs less - $850 against $2,499 at list. |
| Watts per dollar | A | ELAC DS-A101-G is the cheaper watt - about $21 per watt against $36. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A ELAC DS-A101-G B Marantz Model 40n
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: Marantz Model 40n measures better, ELAC DS-A101-G costs about 66% 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 - ELAC DS-A101-G 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 - Marantz Model 40n has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 40 watts is already more than most people ever use, and the extra 30 watts would be headroom you pay for and never hear - we rate Marantz Model 40n 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.