Coaxial Speaker System: 5 x 7 / 6 x 8-inch (125 x 180 mm) Woofer, 0.75-inch (19 mm) Silk Dome TweeterMany people mistakenly believe that an oval speaker cannot perform as well as a round one, leading to many instances of 5.25-inch speakers being installed into 5 x 7-inch openings. JL Audio"s engineers have put in the time and effort to create fantastic-sounding speakers that drop into oval openings and deliver equivalent performance to our 6.5-inch (165 mm) round speaker systems... guaranteed. So, don"t make the mistake of losing cone area and efficiency by stepping down to a smaller round speaker... these ovals rock.In the C5-570x coaxials, the smoothness and transparency of a high-end silk dome tweeter combines with top-flight woofer performance to create a loudspeaker system with exceptional refinement and dynamic capability.The C5-570x system features 5 x 7 / 6 x 8-inch (130 mm) woofers with die-cast alloy baskets and Kurt MÌ_ller cones and suspensions. The woofer benefits from JL Audio"s vast woofer design experience and advanced modeling systems.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 C5 tweeter minimizes tweeter protrusion, allowing C5 coaxials to easily fit behind most factory speaker grilles.C5 crossover networks are compact and built with premium component parts, including Mylarå¨ capacitors and segmented air-core inductors. Four levels of tweeter attenuation are provided, as well as three levels of mid-range presence adjustment, for twelve possible voicing combinations!