FOCAL PS 165 SFFOCAL (PS 165 SF) 6 1 2" COMPONENT SPEAKER SYSTEM STEP UP TO SLATEFIBER COMPONENTS You can always count on Focal's dedication to innovation. From beryllium to flax, their research and development team search far and wide in the hunt for exceptional speaker materials. With Focal PS 165 SF 6 1 2" component system car speakers they've brought slatefiber into the fold. You can also find Slatefiber cones in high performance home speakers like their floor