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 | Fyne Audio Cubitt 5 digs deeper - 43Hz against 66Hz. |
| Connections | B | ELAC Debut DCB41 adds Bluetooth, HDMI and digital inputs. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | B | ELAC Debut DCB41: a sub output. |
| Price | B | ELAC Debut DCB41 is cheaper - $599 against $899, about 33% less. |
A Fyne Audio Cubitt 5 B ELAC Debut DCB41
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?
ELAC Debut DCB41 has the edge on paper, though the margin is not large. The rows marked "depends" may matter more to you than the score does. If a subwoofer is in your plans, the bass gap largely stops mattering - you would be crossing over above 66Hz anyway, which makes the cheaper ELAC Debut DCB41 much easier to justify. Think about the whole system, not just the speakers: the roughly $300 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.