JL Audio C2-600x coaxial speakers (150 mm).

JL Audio C2-600x 2-Way coaxial speakers 6" (150 mm).

Coaxial Speaker System: 6-inch (150 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 precision-engineered woofer designs. 

The 6-inch (150 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. 
Tweeters are coaxially mounted and built with 0.75-inch silk dome diaphragms that deliver smooth, extended response, on and off axis. 
The small size of the C2 tweeter minimizes tweeter protrusion, allowing C2 coaxials to fit behind most factory speaker grilles. 

Speaker 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.