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 | A | NAD C 700 has more power - 80W against 60W into 8 ohms. That is about 1.2dB, which is a small step in loudness but real headroom on peaks. |
| Room size | depends | We rate NAD C 700 the better fit for a mid-size room, a large room and a very large room, and Rotel A12 MKII for desk or near-field listening and a small room. Match the amplifier to the room you actually have, not the one you want. |
| Noise floor | B | Rotel A12 MKII is the quieter design on paper - 100dB against 84dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Both decode on board. Rotel A12 MKII goes higher - 384kHz against 192kHz. Very few recordings exist above 192kHz, so treat this as headroom, not as sound quality. |
| Streaming | A | Only NAD C 700 has AirPlay 2, Roon and BluOS. |
| Analogue inputs | B | Rotel A12 MKII takes more analogue sources - 4 against 2. |
| Phono stage | depends | Rotel A12 MKII has a built-in phono stage (MM) and NAD C 700 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 Rotel A12 MKII has a headphone output. Worth something if you listen late, nothing if you never do. |
| Amplifier class | depends | NAD C 700 is Class D and Rotel A12 MKII is Class A/B. Class D runs cool and draws almost nothing at idle; 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 | NAD C 700 takes up about 60% less shelf area (651cm² against 1633cm²), and it is 82mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | B | Rotel A12 MKII costs less - $1,100 against $1,499 at list. |
A NAD C 700 B Rotel A12 MKII
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?
Rotel A12 MKII has the edge on paper, though not by much. The rows marked "depends" are more likely to decide this than the score is. If you play records, Rotel A12 MKII saves you buying a phono stage; if you do not, ignore that row entirely. Think about the whole system: the roughly $399 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.