The cone, the central element of a loudspeaker, is at the heart of our engineers' research. For loudspeakers used outdoors, it was necessary to design a cone that was as efficient in terms of sound as it was resistant to its environment. The result was the Fiber IP cone, a sandwich cone made of non-woven fiberglass. The sandwich layers increase damping and offer greater versatility. For even greater durability, this cone is IP65 certified, an international standard attesting to its waterproofness and resistance to dust intrusion.