2-way component system: 6.5-inch (165 mm) woofer, 0.75-inch (19 mm) silk dome tweeter. 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 C2-650 system features 6.5-inch (165 mm) component woofers with mineral-filled polypropylene cones, long excursion capabilities, and stamped steel frames. The woofer design benefits from extensive woofer design experience and advanced modeling systems. The 6.5-inch (165 mm) format is a direct fit in many vehicles. Multiple mounting patterns are provided on the woofer frame for easy installation into most vehicles that accept a 6.5-inch (165 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. Sold as a pair. Woofer grilles are included, each consisting of a black grille tray with satin silver accents and a black steel mesh grille with an electroformed logo. - Continuous power handling (RMS): 60 W - Recommended amplifier power (RMS): 15 - 100 W / Ch. - System efficiency: 91.0 dB @ 1 W / 1 m - System nominal impedance: 4 Ω - System frequency response: 59 Hz - 22 KHz ± 3 dB.