BAMF subwoofers are the newest secret weapon for you bass BURP fanatics! These beasts are engineered for the most extreme conditions. Massive 3 4-layer voice coils built on an aluminum former can take the heat. Freakishly oversized motor structures provide more magnetic inertia than is ever necessary for a woofer. Spruce tree pulp cones, high density extended excursion foam surround, and hybrid suspension dampers work together to contain the momentum to a shattering roar Features: Overcompensating Motor Structure for Increased Magnetic Strength 12mm T-Yoke Top Plate Improve Low-Frequency Dynamics Vented T-Yoke Frame Reduces Voice Coil Heat Build-up Non-Magnetic Non-Resonate Die-Cast Aluminum Frame 3 4-Layer Voice Coil w/ Direct Connect Wire Increases Power Handling High-Temperature Tolerance Adhesives Resist Thermal Failure Non-Transfer Spruce Pulp Cone w/ UV Chemical Protection Stitched and Glued Surround/Cone Joints for Strongest Bonding Extended Excursion Polyether Foam Surround w/ UV Protection Dual Poly-Cotton Suspension Dampen Violent Accelerations Stitched Voice Coil Leads Prevent Potential Damage 1-pc Gasket/Trim Ring w/ Concealed Mounting Holes Included