A generation apart: ELAC Debut ConneX DCB61 is the newer design, against a 2021 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 | ELAC Debut ConneX DCB61 digs deeper - 48Hz against 56Hz. A subwoofer would even that out. |
| Built-in power | A | ELAC Debut ConneX DCB61 has the bigger amplifier (160W vs 100W RMS). |
| Connections | B | ELAC Debut ConneX DCB61 adds HDMI; Triangle Borea BR03 BT adds Bluetooth, phono and digital inputs. |
| Size | depends | Similar cabinet size - neither is easier to fit. |
| Expandability | B | Triangle Borea BR03 BT: a sub output. |
| Price | B | Triangle Borea BR03 BT is cheaper - $599 against $899, about 33% less. |
A ELAC Debut ConneX DCB61 B Triangle Borea BR03 BT
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 56Hz anyway, which makes the cheaper Triangle Borea BR03 BT 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.