Siblings in Devialet's Expert range, so they share a design and a house sound. It comes down to power, features and price.
| Area | Better | Why |
|---|
| Power | B | Devialet Expert 220 Pro has more power - 165W against 105W into 8 ohms. That is about 2dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate Devialet Expert 140 Pro the better fit for desk or near-field listening, a small room and a mid-size room, and Devialet Expert 220 Pro for a large room and a very large room. Match the amplifier to the room you actually have, not the one you want. |
| Noise floor | evenly matched | Much the same signal-to-noise ratio (130dB vs 130dB). |
| Built-in DAC | evenly matched | Both have a DAC on board with much the same capability. |
| Streaming | evenly matched | The same streaming platforms and services on both. |
| Analogue inputs | B | Devialet Expert 220 Pro takes more analogue sources - 2 against 1. |
| Room to grow | B | Only Devialet Expert 220 Pro offers preamp outputs - which decides whether you can add a subwoofer or a power amplifier later without replacing the box. |
| Price | A | Devialet Expert 140 Pro costs less - $6,500 against $10,000 at list. |
A Devialet Expert 140 Pro B Devialet Expert 220 Pro
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: Devialet Expert 220 Pro measures better, Devialet Expert 140 Pro costs about 35% less. With most speakers in most rooms that gap is smaller in practice than it looks here. Think about the whole system: the roughly $3,500 saved by taking the cheaper one would buy better speakers or a subwoofer, which does more for the sound than the difference between two competent amplifiers.
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.