Siblings in KEF's LS series, so they share a family sound. It comes down to size, output and price.
| Area | Better | Why |
|---|
| Bass | B | KEF LS LUXE digs deeper - 42Hz against 59Hz. |
| Built-in power | B | KEF LS LUXE has the bigger amplifier (380W vs 200W RMS). |
| Connections | A | KEF LSX adds Bluetooth, Wi-Fi, streaming and digital inputs. |
| Size | depends | KEF LSX is easier to place; KEF LS LUXE is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | A | KEF LSX: a sub output. |
| Price | A | KEF LSX is cheaper - $1,250 against $4,000, about 69% less; arguably a different class. |
A KEF LSX B KEF LS LUXE
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?
Neither runs away with it - they trade advantages. Let the "depends" rows and your own room settle it. 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, KEF LS LUXE 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.