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 | Audiolab 7000A has more power - 70W against 50W into 8 ohms. That is about 1.5dB, which is a small step in loudness but real headroom on peaks. |
| Room size | depends | We rate Denon PMA-900HNE the better fit for desk or near-field listening and a small room, and Audiolab 7000A for a mid-size room, 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 increases strongly (85W and 110W). |
| Noise floor | B | Audiolab 7000A is the quieter design on paper - 110dB against 105dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Both decode on board, but only Audiolab 7000A handles MQA. |
| Streaming | A | Only Denon PMA-900HNE has AirPlay 2, Roon and HEOS. |
| Analogue inputs | evenly matched | The same number of line-level inputs (3). |
| Room to grow | B | Only Audiolab 7000A offers a pre-out/main-in loop - which decides whether you can add a subwoofer or a power amplifier later without replacing the box. |
| Price | A | Denon PMA-900HNE costs less - $949 against $999 at list. |
| Watts per dollar | B | Audiolab 7000A is the cheaper watt - about $14 per watt against $19. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Denon PMA-900HNE B Audiolab 7000A
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?
Audiolab 7000A leads across most of the measured areas for a fairly modest premium, so it is the easier pick if the budget stretches. Denon PMA-900HNE is the one to take if it does not.
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.