The FU SUPER HORN 4.0"is an affordable compression driver with a lightweight, strong phenolic diaphragm designed for midrange reproduction in indoor/outdoor background sound systems and small PA systems alike. High temperature wire used for the voice coil is wound on a Kapton former to withstand high operating temperatures. The nearly indestructible phenolic diaphragm structure allows for easy, cost-effective replacement, in the unlikely event of failure.