Features: • High Excursion Double Laminated Foam Surround for High Speed Bass Response • Expanded and Rolled Steel Basket • Magnet Motor with Heat Pump Cooling Technology • Magnet Motor Vent • Quad Layer Linear Progressive Conex Spiders • Integrated High-Current Tinsel Leads • Black Aluminum 4-Layer Voice Coil Former • Ultra Saturated, High “BL” Magnetic Motor Gap • Extended Pole Technology • Kevlar Reinforced Ultra-Stiff Paper Composite Cone • Woven Fiberglass Dustcap • Molded Rubber Trim Gasket • Stylized Magnet Protection Rubber Boot