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 | Naim Nova PE 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. |
| Room size | depends | We rate Naim Nova PE the better fit for a very large room, and McIntosh MA5300 for desk or near-field listening, a small room and a mid-size room. Match the amplifier to the room you actually have, not the one you want. |
| Grip on hard loads | evenly matched | Both behave much the same into 4 ohms - output increases strongly (250W and 160W). |
| Built-in DAC | evenly matched | Both have a DAC on board with much the same capability. |
| Streaming | A | Only Naim Nova PE has AirPlay 2, Chromecast and Roon. |
| Analogue inputs | B | McIntosh MA5300 takes more analogue sources - 5 against 2. |
| Phono stage | depends | McIntosh MA5300 has a built-in phono stage (MM) and Naim Nova PE 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 | B | Only McIntosh MA5300 offers a pre-out/main-in loop - which decides whether you can add a subwoofer or a power amplifier later without replacing the box. |
| Amplifier class | depends | Naim Nova PE is Class D and McIntosh MA5300 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 | Naim Nova PE takes up about 54% less shelf area (1145cm² against 2488cm²), and it is 294mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | B | McIntosh MA5300 costs less - $6,000 against $9,999 at list. |
A Naim Nova PE B McIntosh MA5300
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?
Neither runs away with it - they trade advantages. Let the "depends" rows and the speakers you already own settle it. If you play records, McIntosh MA5300 saves you buying a phono stage; if you do not, ignore that row entirely. Think about the whole system: the roughly $3,999 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.