Add to Favorite Sellers. Rockford Fosgate Power T0D412 12 T0 4-Ohm DVC Subwoofer. The Rockford Fosgate T0D412 12 4-ohm Dual Voice Coil subwoofer mimics the performance and design from its older Rockford Fosgate Power Series brothers. The T0 subwoofers feature VAST technology that increases surface cone area up to 25% so it performs like a much larger woofer. The FlexFit basket not only looks the part but it provides extreme flexibility for extreme installations. Anodized aluminum heat sinking dust cap.… Continue Reading ››