Available with 10” The SE10V5 Series subwoofer design FEM optimized open motor, provide low distortion and highly motor efficiency. Built in double Nomex &PC mixture dampers. Kraft pulp fiber non-pressed cone, 2.5inch diameter 4 layer coil, Double stacked Ferrite, Stamped steel basket, copper coil, black aluminum former material, Kraft pulp fiber non-pressed cone,foam surround material. The SE12V5 series has continued to be one of the most popular subwoofer lines we have ever released.