Powder Coated Cast Aluminum Frame – to withstand extreme environmental use. Designed to accept optional RGB wiring. Injection Molded Composite Cone – For durability & low distortion. Rubber Spider – Much more durable to water & temperature changes than a traditional treated Cotton Spider used by the majority of marine speakers & subwoofers. Rubber Surround – Offers a superior bond to the composite cone. Gold Plated Terminals – Designed to resist corrosion. Impedance: 2 ohms RMS Watts: 300 PEAK Watts: 600 Frequency Response: 20Hz to 400HZ Sensitivity: 88 db at 1watt/1 meter Weight: 8.1 lbs (7.98kg) Diameter: 11.02 inches w/grill (279.90 mm) Mounting Depth: 4.62 inches w/grill (117.47 mm) Hole Cut Out: 9.45 inches (240.03 mm) Box Specs Optimized for Infinite Baffle (Free Air) applications or 1.3 cu ft sealed enclosure Grills Sold Separately