A generation apart: Cambridge Audio L R X is the newer design, against a 2020 model. Newer is not automatically better, but the older one is more likely to be discounted or near run-out.
| Area | Better | Why |
|---|
| Bass | A | Cambridge Audio L R X digs deeper - 35Hz against 45Hz. |
| Built-in power | A | Cambridge Audio L R X has the bigger amplifier (800W vs 380W RMS). |
| Connections | A | Cambridge Audio L R X adds phono. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | depends | Cambridge Audio L R X: a sub output; KEF LS50 Wireless II: a sub output. |
| Price | A | Cambridge Audio L R X is cheaper - $2,399 against $2,999, about 20% less. |
A Cambridge Audio L R X B KEF LS50 Wireless II
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?
Cambridge Audio L R X is the easier recommendation: it leads on most of the measured areas and costs less. Take KEF LS50 Wireless II if its size, looks or fit in your room suit you better. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 45Hz anyway, so judge these on the other rows instead.
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.