The Evolution C2 systems deliver sparkling high-frequency detail, smooth mid-range and powerful mid-bass, thanks to real silk dome tweeters and long linear excursion woofer designs. The C2-600 system features 6-inch (150 mm) component woofers with mineral-filled polypropylene cones, long excursion capabilities and stamped steel frames. The woofer design benefits from JL Audio's vast woofer design experience and advanced modeling systems. The 6-inch (150 mm) format is a direct fit in many Japanese vehicles where a full-size 6.5-inch speaker (165 mm) will not fit without modification. Multiple mounting patterns are provided on the woofer frame for easy installation into most vehicles that accept a 6-inch (150 mm) speaker. The C2 component tweeters are built with 0.75-inch silk dome diaphragms that deliver smooth, extended response, on and off axis. Flush-mounting and surface-mounting fixtures are included to fit a wide variety of installation needs. C2 crossover networks are compact and built with premium component parts, including Mylar capacitors and segmented air-core inductors. Three levels of tweeter attenuation are provided, as well as a tweeter protector. Woofer grilles are included, each consisting of a black grille tray with satin silver accents and a black steel mesh grille with an electroformed JL Audio logo.