These sit in different price classes - Q Acoustics Q Active 200 costs roughly 1.6x what KEF LSX II does. Expect it to lead on paper; the question is whether the gap is audible enough in your room to be worth it.
| Area | Better | Why |
|---|
| Bass | B | Q Acoustics Q Active 200 digs deeper - 46Hz against 54Hz. A subwoofer would even that out. |
| Built-in power | A | KEF LSX II has the bigger amplifier (200W vs 100W RMS). |
| Connections | B | Q Acoustics Q Active 200 adds phono. |
| Size | depends | KEF LSX II is easier to place; Q Acoustics Q Active 200 is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | depends | KEF LSX II: a sub output; Q Acoustics Q Active 200: a sub output. |
| Price | A | KEF LSX II is cheaper - $1,299 against $2,098, about 38% less; arguably a different class. |
A KEF LSX II B Q Acoustics Q Active 200
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 speakers are judged; anything missing on either side is left out rather than guessed.
Which should you choose?
Q Acoustics Q Active 200 is ahead, but only on 1 of the measured areas, and it costs about 62% more. That is a lot of money for a narrow margin on paper - KEF LSX II looks like the sensible buy unless something else about the Q Acoustics Q Active 200 appeals to you. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 54Hz anyway, which makes the cheaper KEF LSX II much easier to justify. In a large or open-plan room, Q Acoustics Q Active 200 has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, KEF LSX II is the easier speaker to get right.
And remember what a spec sheet cannot show: how each looks in your room and whether the finish suits it, what dealer support and warranty are like where you live, and how they actually sound to you. If you can hear them first - ideally with your own music - that will tell you more than any number above.