Bravox, founded in 1953, has made drivers in Brazil for some of the world's best-reviewed speaker brands, such as Polk Audio, MB Quart, Atlantic Technology...even Bazooka has incorporated Bravox woofers in some of their products.
Vance Dickason, author of "The Loudspeaker Design Cookbook", calls Bravox speakers:
"...some of the best sounding speakers I have
ever designed with. Highly recommended!"