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 | B | Primare I25 Prisma has more power - 100W against 80W into 8 ohms. That is about 1dB, which is a small step in loudness but real headroom on peaks. |
| Room size | depends | We rate Denon AE PMA-A110 the better fit for a small room, and Primare I25 Prisma for a large room and a very large 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 nearly doubles (160W and 200W). |
| Noise floor | A | Denon AE PMA-A110 is the quieter design on paper - 110dB against 100dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Both decode on board. Primare I25 Prisma goes higher - 768kHz against 384kHz. Very few recordings exist above 192kHz, so treat this as headroom, not as sound quality. |
| Streaming | B | Only Primare I25 Prisma has AirPlay 2, Chromecast and Roon. |
| Analogue inputs | B | Primare I25 Prisma takes more analogue sources - 5 against 4. |
| Phono stage | depends | Denon AE PMA-A110 has a built-in phono stage (MM,MC) and Primare I25 Prisma 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 Denon AE PMA-A110 has a headphone output. Worth something if you listen late, nothing if you never do. |
| Amplifier class | depends | Denon AE PMA-A110 is Class A/B and Primare I25 Prisma is Class D. Class A/B runs warm and is the long-established mainstream choice; Class D runs cool and draws almost nothing at idle. Modern examples of both measure well - judge by the rest of the page. |
| Price | A | Denon AE PMA-A110 costs less - $3,999 against $4,495 at list. |
A Denon AE PMA-A110 B Primare I25 Prisma
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 I25 Prisma leads across most of the measured areas for a fairly modest premium, so it is the easier pick if the budget stretches. Denon AE PMA-A110 is the one to take if it does not. If you play records, Denon AE PMA-A110 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.