No single best speaker here - they are built to different priorities, and the right one depends on your room, your sources and what you listen to.
| Area | Better | Why |
|---|
| Bass | B | Klipsch The Nines II digs deeper - 31Hz against 35Hz. A subwoofer would even that out. |
| Connections | A | Cambridge Audio L R X adds Wi-Fi and streaming. |
| Size | depends | Cambridge Audio L R X is easier to place; Klipsch The Nines II is bigger, which usually goes with fuller bass. Your room decides. |
| Expandability | depends | Cambridge Audio L R X: a sub output; Klipsch The Nines II: a sub output. |
| Price | evenly matched | Much the same money ($2,399 vs $2,399 a pair). |
A Cambridge Audio L R X B Klipsch The Nines 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?
Neither runs away with it - they trade advantages. Let the "depends" rows and your own room settle it. In a large or open-plan room, Klipsch The Nines II has the cabinet volume to fill it more easily; in a small room, near a wall or at desk distance, Cambridge Audio L R X 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.