Forget your current audio system and treat yourself to a rejuvenated sound experience with our Polyglass kits that combine power, durability and compactness. Over the years, this line has never stopped improving across the board, from concept to design. The subwoofers, which can be used in a sealed or bass-reflex box, make a real difference with their impactful bass. All components of the line are meticulously put together to surround passengers with warm sound that has no colouration.