Filter Filters 8" Alpine Remove All Filters Price $100-$500 (7) Condition New (7) Voice Coils Dual (4) Speaker Type 1-way (2) Alpine S2-W8D4 S-Series 300W RMS Dual 4-Ohm Subwoofer for Car Audio $144.45 Alpine R2-W8D2 Next-Generation R-Series Dual 2-Ohm 350 RMS Watts 8" Subwoofer $249.95 Alpine R2-W8D4 Next-Generation R-Series Dual 4-Ohm 350 RMS Watts 8" Subwoofer $249.95 Alpine S-W8D2 Car Audio Type S Series Sub Dual 2 Ohm 600W Peak 8" Subwoofer $124.95 Alpine R2-W8D2 Next Gen 8" Sub R-Series Dual 2-Ohm 350 RMS Includes HA-A400.1... $249.95 Alpine S2-SB8 S-Series S2-SB8 8" Preloaded Subwoofer Wedge Enclosure & 300W... $299.95 Alpine R2-W8D4 Next Gen 8" Sub R-Series Dual 4-Ohm 350 RMS Includes HA-A400.1... $249.95