Different price classes - Audiolab 8300A costs roughly 1.9x what Audiolab 6000A 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 | Audiolab 8300A has more power - 75W against 50W 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 Audiolab 8300A the better fit for a mid-size room, a large room and a very large room, and Audiolab 6000A 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 (115W and 75W). |
| Noise floor | A | Audiolab 8300A is the quieter design on paper - 107dB against 76dB. Audible mainly with sensitive speakers in a quiet room. |
| Built-in DAC | B | Audiolab 6000A has a DAC on board; the other needs an external one, which is another box, another power lead and another purchase. |
| Analogue inputs | evenly matched | The same number of line-level inputs (4). |
| Room to grow | evenly matched | The same expansion options on both. |
| Price | B | Audiolab 6000A costs less - $899 against $1,699 at list. |
| Watts per dollar | B | Audiolab 6000A is the cheaper watt - about $18 per watt against $23. A blunt measure, and it says nothing about how either sounds, but it is the honest one for raw output. |
A Audiolab 8300A B Audiolab 6000A
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?
Neither runs away with it - they trade advantages. Let the "depends" rows and the speakers you already own settle it. If you already own a DAC or a streamer, the built-in one is money you are paying twice for, and Audiolab 8300A becomes the more rational buy. Think about the whole system: the roughly $800 saved by taking the cheaper one would buy better speakers or a subwoofer, which 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 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.