✹Dynamic Sound (RMS 400W) More powerful sound can be enjoyed with RMS increased 15% from Comparison with Previous Model the previous model. ・Magnet Weight  up 17% ・Voice Coil Diameter  up 30% ✹Butyl Rubber Surround & Center Cap The butyl rubber surround and the three-dimensional center cap design provide stable bass delivery with more power and less distortion. CS-GD1200 Conventional Subwoofer CS-GD1200 ✹Cutaway View 12” (30cm) Dual Voice Coil Subwoofer Unit Aggressive Design Gasket 3D Structure and Sputtering Olefin Diaphragm 8AWG Ready Push Terminals Butyl Rubber Surround Aramid Reinforced Pulp Cone High Linearity Spider Dual Voice Coil Large Strontium Magnet 62. 6 oz Long Stroke and Vented Pole Yoke Recommended System CS-VS607 KW-AVX740 CS-VS607 Recommended Enclosure Size Sealed Type Front Front 0. 5 cu/ft (1 cu/ft recommended) Rear KS-AX3104 Rear CS-V6947 KS-AX3101D CS-V6947 Ported Type 1-1. 8 cu/ft (1. 2 cu/ft recommended) CS-GD1200 Key Specifications Dimensions CS-GD1200 Size Power Handling Capacity (Peak) Power Handling Capacity (RMS) Sensitivity Frequency Response Impedance Fs Qts Vas Magnet Mass Hole Cutout Diameter Mounting Depth Weight (NET) 12” (30 cm) 1400W 400W 86. 5dB/W. m 20 - 2,000Hz 4Ω + 4Ω (Dual Input) 32. 6Hz 0. 658 1. 7 ft3 62. 6 oz Dia. 10 31/32” (278 mm) 5 25/32” (146. 3 mm) 5. 5kg (12. 2 lbs. ) CS-GD1200 6-15/32 inch (164. 3 mm) 12-25/32 inch (324. 6 mm) 12-1/16 inch (306 mm) 7/32 inch (5. 2 mm) x 8 HOLES 6-9/16 inch (166. 3 mm) 6-5/32 inch (156 mm) 12-27/32 inch (325. 5 mm) 10-29/32 inch (276. 5 mm) 5-25/32 inch (146. 3 mm) 1-7/32 inch (30...