Fusion Entertainment SG-F77W 280W Coaxial Classic Marine Speaker, 7.7" CURV Cone Technology - Incorporating CURV woven fiber composite, which is heat pressed, to form a lighter and stronger cone that delivers greater sound definition and higher output, for greater resistance to the marine environment Fully Sealed Crossover Components - Providing full protection from the harsh marine environment, whilst delivering improved frequency response at the crossover point for a detailed spectrum of audio and new level of acoustic performance Silk Dome Tweeter- Smooth upper frequency response and increased efficiency, delivers crisp sound; Large Diameter Voice Coil- Delivers an increase in power and efficiency, the voice coil provides a signature sound exclusive to the 7.7" FUSION Speakers Perforated Metal Grille - An elegant classic white finish, designed to perfectly blend with the surroundings of your vessel. This discreet, yet refined design is suitable for internal or external installation