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 | A | Hegel H190v has more power - 150W against 100W into 8 ohms. That is about 1.8dB, which is a small step in loudness but real headroom on peaks. |
| Speaker load rating | A | Hegel H190v is rated down to 2 ohms against 4, so it is the safer partner for a low-impedance speaker. |
| Bass control | A | Hegel H190v has the higher damping factor (4000 vs 190), which usually means a tighter grip on a woofer. Above about 100 the returns flatten out, so read this as a tendency rather than a ranking. |
| Noise floor | A | Hegel H190v is the quieter design on paper - 100dB against 90dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Both decode on board, but only NAD M10 V3 handles MQA. |
| Streaming | evenly matched | The same streaming platforms and services on both. |
| Use with a TV | depends | Only NAD M10 V3 has HDMI, so the television can drive it directly and one remote controls the volume. If the system is for music only, this changes nothing. |
| Room to grow | evenly matched | The same expansion options on both. |
| Headphones | depends | Only Hegel H190v has a headphone output. Worth something if you listen late, nothing if you never do. |
| Amplifier class | depends | Hegel H190v is Class A/B and NAD M10 V3 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 | NAD M10 V3 takes up about 66% less shelf area (606cm² against 1763cm²), and it is 132mm 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 | A | Hegel H190v is the cheaper watt - about $21 per watt against $32. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Hegel H190v B NAD M10 V3
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?
Hegel H190v has the edge on paper, though not by much. The rows marked "depends" are more likely to decide this than the score is. If this sits under a television, NAD M10 V3 is the one to buy - HDMI ARC means the TV remote controls the volume and there is no second box in the way.
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.