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 | Naim NAP 350 has more power - 175W against 100W into 8 ohms. That is about 2.4dB, 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 PrimaLuna EVO 300 Hybrid Power 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 | A | Naim NAP 350 holds up better into a 4-ohm load: its output nearly doubles to 345W, where the other increases strongly. That matters with demanding speakers far more than the 8-ohm figure does. |
| Analogue inputs | evenly matched | The same number of line-level inputs (1). |
| Amplifier type | depends | Naim NAP 350 is Solid State and PrimaLuna EVO 300 Hybrid Power is Hybrid. 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. |
| Price | B | PrimaLuna EVO 300 Hybrid Power costs less - $7,195 against $8,499 at list. |
| Watts per dollar | A | Naim NAP 350 is the cheaper watt - about $49 per watt against $72. 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 PrimaLuna EVO 300 Hybrid Power
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 leads across most of the measured areas for a fairly modest premium, so it is the easier pick if the budget stretches. PrimaLuna EVO 300 Hybrid Power is the one to take if it does not. If your speakers are a difficult load - 4 ohms nominal, big woofers, or a sensitivity in the low 80s - Naim NAP 350 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 - 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, 100 watts is already more than most people ever use, and the extra 75 watts would be headroom you pay for and never hear - we rate Naim NAP 350 poorly for near-field use for exactly that reason.
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.