Rockford fosgate p3d4 12 punch p3 July 8, 2019 16 32 64 128 Rockford fosgate p3d4 12 punch 12 p3 4 ohm dvc subwoofer Rockford fosgate p3d4 12 punch p3 dvc 4 ohm 12 inch Rockford fosgate p3 8 inch subwoofer Rockford 12 inch subwoofer Rockford fosgate hx2 12