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 | A | Cambridge Audio L R X digs deeper - 35Hz against 41Hz. A subwoofer would even that out. |
| Built-in power | A | Cambridge Audio L R X has the bigger amplifier (800W vs 200W RMS). |
| Connections | B | Technics SC-CX700 adds Bluetooth, phono and digital inputs. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | B | Technics SC-CX700: a sub output. |
| Price | A | Cambridge Audio L R X is cheaper - $2,299 against $3,499, about 34% less. |
A Cambridge Audio L R X B Technics SC-CX700
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 41Hz anyway, so judge these on the other rows instead. Think about the whole system, not just the speakers: the roughly $1,200 saved by taking the cheaper pair would buy a subwoofer or a better amplifier, and either usually does more for the sound than the difference between these two.
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.