Alpine S-SB12V Bundle: Two Alpine S-SB12V + Al...

2 Alpine S-SB12V 12" Halo Series Linkable Ported Vented Loaded Subwoofer Enclosure + Alpine KTX-H...

2 Alpine S-SB12V 12" Halo Series Linkable Ported Vented Loaded Subwoofer Enclosure + Alpine KTX-H12 Alpine S-SB12V Pre-Loaded S-Series 12-inch Subwoofer Enclosure UNIQUE PROLINK™ DESIGN When you’re looking to make a noticeable impact in your sound system, you add a subwoofer that will bring out the low ends of your music. But what if you already have a single subwoofer and still crave more bass? You could throw out your single enclosure and purchase a new dual enclosure or you can build your...