These are not the same size of amplifier: Audiolab 9000A has roughly 2x the power of Audiolab 6000A Play. That is about 3dB, so it is a question of room size and how hard your speakers are to drive, not of one being the better amplifier.
| Area | Better | Why |
|---|
| Power | A | Audiolab 9000A has more power - 100W against 50W into 8 ohms. That is about 3dB, so it plays usefully louder before it runs out and has more in hand on peaks. |
| Room size | depends | We rate Audiolab 9000A the better fit for a mid-size room, a large room and a very large room, and Audiolab 6000A Play for desk or near-field listening and a small 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 75W). |
| Noise floor | A | Audiolab 9000A is the quieter design on paper - 110dB against 76dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | A | Both decode on board, but only Audiolab 9000A handles DSD and MQA. |
| Streaming | evenly matched | Only Audiolab 6000A Play has DTS Play-Fi. Neither list is longer in a way that matters - check the one service you actually pay for. |
| Analogue inputs | B | Audiolab 6000A Play takes more analogue sources - 4 against 3. |
| Room to grow | evenly matched | The same expansion options on both. |
| Price | B | Audiolab 6000A Play costs less - $1,700 against $2,999 at list. |
A Audiolab 9000A B Audiolab 6000A Play
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?
The usual trade-off: Audiolab 9000A measures better, Audiolab 6000A Play costs about 43% less. With most speakers in most rooms that gap is smaller in practice than it looks here. 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 - Audiolab 9000A has the headroom, and headroom is what stops an amplifier hardening up on peaks. At desk distance or in a small room, 50 watts is already more than most people ever use, and the extra 50 watts would be headroom you pay for and never hear - we rate Audiolab 9000A poorly for near-field use for exactly that reason. Think about the whole system: the roughly $1,299 saved by taking the cheaper one would buy better speakers or a subwoofer, and either does more for the sound than the difference between two competent amplifiers.
What a spec sheet cannot show: how either sounds with your speakers, how the interface feels 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.