MB Quart FKB168, Formula 5x7" / 6x8" 2-way Coaxial Speakers - 250 Watts Peak

Tweeters    Aluminum dome tweeters deliver great sound with increased reliability. Cone Material    Lightweight thermal-formed polypropylene cones enable faster midrange response. Surround / Cone Coupling    Butyl rubber surrounds provide durability and deeper mid-bass impact. The cone/surround connection utilizes a high temp adhesive which assure the cone and surround do not separate in high power uses or extremes of weather. Gasket    A textured ABS gasket assures a rigid linear seal to the mounting surface. ​Voice Coil / Former Assembly    Pure Copper voice coil creates a strong magnetic field with a very thin extrusion. Kapton voice coil former is lightweight and efficiently dissipates heat. Spider    Natural fiber allows flexibility while the infused epoxy gives strength during the manufacturing process. Cooling System    Over-coil cooling system allows air exchange over the voice coil through the spider Crossover    6dB internal crossover integrated into the design to assure smoo