Loaded Sub Enclosures Alpine S-SB12V Single 12" Halo S-Series Preloaded Subwoofer Enclosure with... $449.95 Alpine S-SB10V Single 10" Alpine Halo S-Series Preloaded Subwoofer Enclosure... $399.95 Alpine SS-SB10 Car Audio S-Series 300W RMS 2-Ohm Downward-Firing 10" Loaded... $359.95 Alpine SS-SB12 Car Audio S-Series 300W RMS 2-Ohm Downward-Firing 12" Loaded... $399.95 Alpine RS-SB10 Car Audio Halo R-Series 600W RMS 2-Ohm 10" Loaded Sub Box... $599.95 Alpine RS-SB12 Car Audio Halo R-Series 600W RMS 2-Ohm 12" Loaded Sub Box... $639.95