The BD Pro speakers are part of our Pro audio products meaning they are extremely loud, clear and efficient but also built to compete. The HEX steel mesh grille adds to aesthetic and protects speakers from any damage. The black hole dust cap increases effective cone area usually lost by traditional dust cap design, more cone area means more SPL (Sound Pressure Level). Moreover, the paper cone is lightweight and strong so the driver to be highly efficient outputting more volume with less power.