DESC: The TS-A1057 features Pioneer's patented Foamed IMPP (injection molded polypropylene) cone and butyl rubber surround for snappy midbass and high efficiency. The 1" foamed balanced dome tweeter produces crisp, distortion free highs. Features a shallow mount design for wide installation coverage. Drop a set of these drivers into your factory speaker locations and prepare to amazed by the improvement in sound!