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 | evenly matched | Much the same reach (47Hz vs 48Hz). |
| Built-in power | B | ELAC Debut ConneX DCB61 has the bigger amplifier (160W vs 120W RMS). |
| Connections | A | Triangle Borea BR03 Connect adds Bluetooth, phono and digital inputs. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | A | Triangle Borea BR03 Connect: a sub output. |
| Price | A | Triangle Borea BR03 Connect is cheaper - $799 against $899, about 11% less. |
A Triangle Borea BR03 Connect B ELAC Debut ConneX DCB61
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?
Triangle Borea BR03 Connect has the edge on paper, though the margin is not large. The rows marked "depends" may matter more to you than the score does.
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.