Crunch CRW12D4 CRW Series 12 Inch 800 Watt Dual Voice Coil Dual 4 Ohm Subwoofer Sanding Dimension (W x H x 140.65 Dimension (W x H x D): 8 Made From Chemical Resistant Polypropylene 400 watts RMSAdd extra bass allows back venting for more power handling and increased reliabilityEpoxy infused poly cotton fiber spider allows flexibility while epoxy gives strength during the manufacturing process and ability to handle more power with minimum distortionsPressure treated foam surround along wpoly cotton spider helps keep the piston motion of the subwoofer linear and distortion freeCopper voice coils create strong magnetic field with a very thin extrusionVented high energy motor assembly with heavy duty magnets increases power handling and increases SPLThermal formed polypropylene dust cap for great sound quality and increased reliabilitySpade style terminals for easy installationMounting depth: 5