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 | Rotel RAS-5000 has more power - 140W against 100W 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 Audiolab 9000A the better fit for desk or near-field listening, a small room and a mid-size room, and Rotel RAS-5000 for 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 (160W and 220W). |
| Noise floor | A | Audiolab 9000A is the quieter design on paper - 110dB against 103dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Both decode on board. Rotel RAS-5000 goes higher - 384kHz against 192kHz. Very few recordings exist above 192kHz, so treat this as headroom, not as sound quality. |
| Streaming | B | Only Rotel RAS-5000 has AirPlay 2, Chromecast and Roon. |
| Analogue inputs | A | Audiolab 9000A takes more analogue sources - 3 against 1. |
| Phono stage | depends | Audiolab 9000A has a built-in phono stage (MM) and Rotel RAS-5000 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 | A | Only Audiolab 9000A offers a pre-out/main-in loop - which decides whether you can add a subwoofer or a power amplifier later without replacing the box. |
| Shelf space | depends | Audiolab 9000A takes up about 22% less shelf area (1518cm² against 1940cm²), and it is 105mm shallower, which is the measurement that decides whether a rack door shuts. |
| Price | evenly matched | Priced within a few per cent of each other. |
| Watts per dollar | B | Rotel RAS-5000 is the cheaper watt - about $21 per watt against $30. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Audiolab 9000A B Rotel RAS-5000
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?
Rotel RAS-5000 has the edge on paper, though not by much. The rows marked "depends" are more likely to decide this than the score is. If you play records, Audiolab 9000A 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.