PIONEER TS-S20TS S20, Tune up tweeter makes your system upgrade complete by producing all the missing sounds. Now hear the music the way artists intended for you. TS S20 is the optimum tool to easily upgrade a current system. Features Ti Coated Diaphragm Specially designed diaphragm material made form PPS(Polyphenylene Sulfide) to withstand extreme heat such as Indian climatic condition. Coated with "Titanium" to increase durability and provide a crisp sound. Tune