Different price classes - Yamaha A-S3200 costs roughly 1.7x what Primare I35 does. Expect it to lead on paper; the question is whether you will hear the difference through the speakers you own.
| Area | Better | Why |
|---|
| Power | A | Primare I35 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 Primare I35 the better fit for a very large room, and Yamaha A-S3200 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 | Primare I35 holds up better into a 4-ohm load: its output nearly doubles to 300W, where the other increases strongly. That matters with demanding speakers far more than the 8-ohm figure does. |
| Noise floor | B | Yamaha A-S3200 is the quieter design on paper - 114dB against 100dB. Audible mainly with sensitive speakers in a quiet room. |
| Analogue inputs | B | Yamaha A-S3200 takes more analogue sources - 7 against 5. |
| Phono stage | depends | Yamaha A-S3200 has a built-in phono stage (MM,MC) and Primare I35 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 Yamaha A-S3200 has a headphone output. Worth something if you listen late, nothing if you never do. |
| Amplifier class | depends | Primare I35 is Class D and Yamaha A-S3200 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. |
| Price | A | Primare I35 costs less - $4,595 against $8,000 at list. |
| Watts per dollar | A | Primare I35 is the cheaper watt - about $31 per watt against $80. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Primare I35 B Yamaha A-S3200
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?
Primare I35 has the edge on paper, though not by much. The rows marked "depends" are more likely to decide this than the score is. If your speakers are a difficult load - 4 ohms nominal, big woofers, or a sensitivity in the low 80s - Primare I35 is the safer partner, because how an amplifier behaves when the impedance drops matters more than its 8-ohm rating. If you play records, Yamaha A-S3200 saves you buying a phono stage; if you do not, ignore that row entirely.
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.