[. . . ] The series also comes in sleek looks. ✹Butyl Rubber Surround The butyl rubber surround absorbs the minute diaphragm vibrations. [. . . ] Its high tolerance to large amplitudes enables bass reproduction with little distortion. ✹Rubber Trim Ring The ring is made of flexible material, which reduces noise and unwanted vibrations between the main unit and the car or enclosure, providing quality sound. ✹Large Magnet and Dual-Voice Coil The D302 and CS-AW6040 have 53. 7 oz magnet and 2-inch voice coil, enabling 350W rated input. You can play steady, deep bass with an output amplifier. ✹Metal Sputtering Olefin Cone Metal has been added to the cone material for increased strength and rigidity. 9 3/8” (238 mm) 5 1/8” (129 mm) D302 12” (30 cm) 1000W 350W 87dB 25 - 2000Hz 4Ω + 4Ω 25. 4Hz 0. 998 3. 05 ft3 53. 7 oz Dia. 11-5/16 inch (287 mm) CS-AW6040 D302 5-21/32 inch (143 mm) 5-1/8 inch (130 mm) 7/8 inch (22. 2 mm) NTK-0673-33 [. . . ] 9 3/8” (238 mm) 5 1/8” (129 mm) D302 12” (30 cm) 1000W 350W 87dB 25 - 2000Hz 4Ω + 4Ω 25. 4Hz 0. 998 3. 05 ft3 53. 7 oz Dia. [. . . ]