Polk Audio SR104 DVC AA1035-A 10-Inch Dual Voice Coil Subwoofer Dual 4 Ohm Voice Coil (DVC) gives you maximum wiring and Impedance options (Single Voice Coil (SVC) model also available). Massive die-cast aluminum basket to house the 16 pound motor structure. A 2.5 inch glass/epoxy voice coil former wound with four layers of heavy gauge high temperature Aluminum wire provides the highest power handling and reliability. Dual progressive roll spiders precisely control the cones long excursion for the ultimate in tight, detailed and musical bass. Frequency Response- 20Hz to 200Hz / Power Handling - 700w RMS (1400w Peak)