Siblings in Naim's NAP range, so they share a design and a house sound. It comes down to power, features and price.
| Area | Better | Why |
|---|
| Power | A | Naim NAP 350 has more power - 175W against 90W into 8 ohms. That is about 2.9dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate Naim NAP 350 the better fit for a large room and a very large room, and Naim NAP 300 DR 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. |
| Analogue inputs | evenly matched | The same number of line-level inputs (1). |
| Price | A | Naim NAP 350 costs less - $8,499 against $12,700 at list. |
| Watts per dollar | A | Naim NAP 350 is the cheaper watt - about $49 per watt against $141. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Naim NAP 350 B Naim NAP 300 DR
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?
Naim NAP 350 is the easier recommendation: it leads on most of the measured areas and costs less. Take Naim NAP 300 DR if one of the "depends" rows above describes your system. 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 - Naim NAP 350 has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 90 watts is already more than most people ever use, and the extra 85 watts would be headroom you pay for and never hear - we rate Naim NAP 350 poorly for near-field use for exactly that reason. Think about the whole system: the roughly $4,201 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.