Different price classes - NAD Masters Series M10 V2 costs roughly 2x what NAD C 379 BluOS-D does. Expect it to lead on paper; the question is whether you will hear the difference through the speakers you own.
| Area | Better | Why |
|---|
| Power | B | NAD Masters Series M10 V2 has more power - 100W against 80W into 8 ohms. That is about 1dB, which is a small step in loudness but real headroom on peaks. |
| Grip on hard loads | evenly matched | Both behave much the same into 4 ohms - output barely increases (80W and 100W). |
| Noise floor | A | NAD C 379 BluOS-D is the quieter design on paper - 95dB against 90dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | A | Both decode on board. NAD C 379 BluOS-D goes higher - 384kHz against 192kHz. Very few recordings exist above 192kHz, so treat this as headroom, not as sound quality. |
| Streaming | evenly matched | The same streaming platforms and services on both. |
| Phono stage | depends | NAD C 379 BluOS-D has a built-in phono stage and NAD Masters Series M10 V2 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 NAD C 379 BluOS-D has a headphone output. Worth something if you listen late, nothing if you never do. |
| Shelf space | depends | NAD Masters Series M10 V2 takes up about 67% less shelf area (606cm² against 1810cm²), and it is 138mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | A | NAD C 379 BluOS-D costs less - $1,499 against $2,999 at list. |
| Watts per dollar | A | NAD C 379 BluOS-D is the cheaper watt - about $19 per watt against $30. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A NAD C 379 BluOS-D B NAD Masters Series M10 V2
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?
NAD C 379 BluOS-D is the easier recommendation: it leads on most of the measured areas and costs less. Take NAD Masters Series M10 V2 if one of the "depends" rows above describes your system. If you play records, NAD C 379 BluOS-D saves you buying a phono stage; if you do not, ignore that row entirely. Think about the whole system: the roughly $1,500 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.