Audiophilepure

https://www.stereophile.com/content/audiovector-r-3-arret%C3%A9-loudspeaker

Despite the similarities, the R 8 and R 3 Arretés are very different speakers. Start with the fact that the R 8 Arreté is much larger, has several additional drivers, and weighs three times as much. The R 8 is a complex speaker, which, as I wrote in my review, “sends energy out into the air via no fewer than nine sound-radiating openings, only four of them—the three midwoofers and the tweeter—firing forward. The others are the down-firing woofer (which radiates through those base slots to the back and sides), the rear-firing midrange driver (diffracted through those five horizontal grooves), the vent that allows the tweeter’s back wave to emerge from the rear, and the two aforementioned ports.” That’s a lot for a designer to integrate, though with the R 8, Ole did a superb job: As I wrote in the review, “what I heard from the R 8s was anything but complicated: It was pure and coherent and easily grasped.”

https://www.hifichoice.com/content/triangle-borea-br08

No less importantly, it demonstrates that the Triangle is usefully sensitive as the 50W of the Brio is more than enough to drive it to any level you might want to achieve in a normal room. The rest of testing takes place on the considerably more powerful (and expensive) Cambridge Audio Edge A, which delivers some commensurate gains to the performance, but the fundamental positive qualities of the Triangle remain unchanged throughout.

You can take this to mean that the BR08 won’t necessarily elevate every single system it’s connected to but a rather more positive view would be to see this as a fine speaker to upgrade a relatively affordable existing system.