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 | evenly matched | Effectively the same output - 105W against 100W into 8 ohms is under 1dB, which is not an audible difference in loudness. |
| Room size | depends | We rate Devialet Expert 140 Pro the better fit for a small room, and McIntosh MA5300 for a large room and a very large room. Match the amplifier to the room you actually have, not the one you want. |
| Speaker load rating | A | Devialet Expert 140 Pro is rated down to 2 ohms against 4, so it is the safer partner for a low-impedance speaker. |
| Noise floor | A | Devialet Expert 140 Pro is the quieter design on paper - 130dB against 110dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Both decode on board. McIntosh MA5300 goes higher - 384kHz against 192kHz. Very few recordings exist above 192kHz, so treat this as headroom, not as sound quality. |
| Streaming | evenly matched | Only Devialet Expert 140 Pro has Roon. Neither list is longer in a way that matters - check the one service you actually pay for. |
| Analogue inputs | B | McIntosh MA5300 takes more analogue sources - 5 against 1. |
| Room to grow | B | Only McIntosh MA5300 offers preamp outputs and a pre-out/main-in loop - which decides whether you can add a subwoofer or a power amplifier later without replacing the box. |
| Headphones | depends | Only McIntosh MA5300 has a headphone output. Worth something if you listen late, nothing if you never do. |
| Amplifier class | depends | Devialet Expert 140 Pro is ADH (Analog Digital Hybrid) and McIntosh MA5300 is Class A/B. 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 | Devialet Expert 140 Pro takes up about 39% less shelf area (1521cm² against 2488cm²), and it is 162mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | B | McIntosh MA5300 costs less - $6,000 against $6,500 at list. |
A Devialet Expert 140 Pro B McIntosh MA5300
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?
McIntosh MA5300 has the edge on paper, though not by much. The rows marked "depends" are more likely to decide this than the score is.
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.