Alpine SWT-10S2 10" Subwoofer 2 OHMS

Alpine R2-W8D2 8″ Subwoofer with Dual 2-ohm Voice Coils

Alpine R2-W12D4 R Series 12″ Subwoofer with Dual 4-Ohm Voice Coils

Alpine R2-W10D4 R Series 10″ Subwoofer with Dual 4-Ohm Voice Coils

Alpine R2-W12D2 12" R-Series R2 Subwoofer, Dual 2-Ohm, 750 Watt RMS

Alpine S-Series S2-W12D4 12" Subwoofer with 4-Ohm Voice Coils & 1800W Peak Power

Alpine Electronics pwe-s8 Restyle Compact Powered 8-Inch Subwoofer

Alpine S2-W10D2 10” S-Series DVC Subwoofer

Alpine S-W8D2 S-Series 8" Dual 2-Ohm Subwoofer