These sit in different price classes - Dynaudio Focus 10 costs roughly 4.4x what KEF LSX 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 | A | Dynaudio Focus 10 digs deeper - 43Hz against 59Hz. |
| Built-in power | A | Dynaudio Focus 10 has the bigger amplifier (390W vs 200W RMS). |
| Connections | evenly matched | The same set of inputs and streaming options. |
| Size | depends | KEF LSX is easier to place; Dynaudio Focus 10 is bigger, which usually goes with fuller bass. Your room decides. |
| Cabinet | depends | Sealed vs Ported. Sealed is tighter and happier near a wall; ported digs lower but wants space behind it. |
| Expandability | depends | Dynaudio Focus 10: a sub output; KEF LSX: a sub output. KEF LSX sits in a wider range (10 models), so a matched surround system is easier later. |
| Price | B | KEF LSX is cheaper - $1,250 against $5,500, about 77% less; arguably a different class. |
A Dynaudio Focus 10 B KEF LSX
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?
The usual trade-off: Dynaudio Focus 10 measures better, KEF LSX costs about about 4.4x the price% less. Whether that gap is worth the money is the call only you can make - and in a normal room it is often smaller than the numbers suggest. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 59Hz anyway, which makes the cheaper KEF LSX much easier to justify. In a large or open-plan room, Dynaudio Focus 10 has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, KEF LSX 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.