Woofer made of composite polypropylene. The durable polypropylene diaphragm reproduces deep bass and balances peaks in the mid and high frequency ranges to seamlessly match the sound with the tweeter. Foam rubber surround. The woofer surround is made from foam rubber with a lightweight, durable matrix structure filled with air, which produces full bass through optimal damping properties. Silk soft dome tweeter. The soft dome tweeter is equipped with technology developed for our premium speaker designs, featuring a flat frequency response and a wider listening field. Additionally, a silk diaphragm produces a natural, soft sound with good self-damping. Spider for progressive height position. Higher nominal power and optimized airflow are achieved through the acoustically optimized spider, which ensures faster and more precise damping of the speaker cone. Dynamic Air Diffuser. The Dynamic Air Diffuser ensures efficient air circulation, allowing the cone to move freely and keeping the voice coil cool. Easy installation. The smaller housing of the tweeters and the flat woofer housing reduce physical interference with factory grilles, making it easy to install this speaker in a variety of vehicles.