Filter Filters Dual Remove All Filters Price $100-$500 (5) Condition New (5) Brand Alpine (5) Size 12" (2) 10" (2) 8" (1) Speaker Type 1-way (5) Alpine R2-W8D4 Next-Generation R-Series Dual 4-Ohm 350 RMS Watts 8" Subwoofer $249.95 Alpine R2-W10D4 Next-Generation R-Series Dual 4-Ohm 750 RMS Watts 10" Subwoofer $329.95 Alpine R2-W10D2 Next-Generation R-Series Dual 2-Ohm 750 RMS Watts 10" Subwoofer $329.95 Alpine R2-W12D2 Next-Generation R-Series Dual 2-Ohm 750 RMS Watts 12" Subwoofer $379.95 Alpine R2-W12D4 Next-Generation R-Series Dual 4-Ohm 750 RMS Watts 12" Subwoofer $379.95