MX770-CCX-SG-TB - JL Audio 7.7" 2-Way Marine Cockpit Coaxial MX Series Speakers (Titanium) MX770-CCX-SG-TB - JL Audio 7.7" 2-Way Coaxial Marine Speakers Titanium Injection-molded mica-filled polypropylene cone Dust cap profile engineered for smooth upper-end response Synthetic fiber spider with progressive roll design and made specifically for marine applications Top Mount Depth: 3-3/16"