A valve amplifier against a solid-state one. They are not really rivals: they differ in character, in what they will drive and in what owning them involves, so start there rather than with the watts.
| Area | Better | Why |
|---|
| Power | A | Advance Paris A12 Classic has more power - 190W against 80W into 8 ohms. That is about 3.8dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Grip on hard loads | A | Advance Paris A12 Classic holds up better into a 4-ohm load: its output increases modestly to 280W, where the other barely increases. That matters with demanding speakers far more than the 8-ohm figure does. |
| Noise floor | A | Advance Paris A12 Classic 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, but only NAD C 700 handles MQA. |
| Streaming | B | Only NAD C 700 has AirPlay 2, Roon and BluOS. |
| Phono stage | depends | Advance Paris A12 Classic has a built-in phono stage 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 | A | Only Advance Paris A12 Classic offers 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 Advance Paris A12 Classic has a headphone output. Worth something if you listen late, nothing if you never do. |
| Amplifier type | depends | Advance Paris A12 Classic is Hybrid and NAD C 700 is Solid State. Valve designs are usually warmer and softer at the limits and need their tubes replaced eventually; solid state is the lower-maintenance choice. This is a taste and ownership decision, not a quality one. |
| Shelf space | depends | NAD C 700 takes up about 68% less shelf area (651cm² against 2043cm²), and it is 177mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | B | NAD C 700 costs less - $1,599 against $4,499 at list. |
A Advance Paris A12 Classic B NAD C 700
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: Advance Paris A12 Classic measures better, NAD C 700 costs about 64% less. With most speakers in most rooms that gap is smaller in practice than it looks here. If your speakers are a difficult load - 4 ohms nominal, big woofers, or a sensitivity in the low 80s - Advance Paris A12 Classic is the safer partner, because how an amplifier behaves when the impedance drops matters more than its 8-ohm rating. Start with the room. In a large or open-plan room, or with speakers that are hard to drive - low sensitivity, or an impedance that dips - Advance Paris A12 Classic has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 80 watts is already more than most people ever use, and the extra 110 watts would be headroom you pay for and never hear.
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.