Alpine S2-SB10 Dual Subwoofer Bundle with KTX-LK10 Linking Kit. Experience thunderous bass that doesn't compromise your cargo space with the Alpine S2-SB10 Dual Subwoofer Bundle. This package includes two Alpine S2-SB10 10-inch shallow subwoofers and the KTX-LK10 Linking Kit, designed specifically for this bundle. This system provides deep, powerful bass that's easy to install in a variety of vehicles. ILLUMINATE YOUR AUDIO Color and sound collide to bring you an intentionally crafted wedge style subwoofer enclosure, designed for optimal bass and vehicle fitment. LIGHTING CONTROL WITH ILX-W670 Manage the integrated RGBW trim bars effortlessly through the intuitive Lighting Link control screen on the iLX-W670 Receiver (sold separately). MULTI-LINK LIGHTING The PrismaLink Enclosures feature a pre-wired, RGB light integration in the trim bars that?s able to connect across the optional linking brackets S-SERIES PERFORMANCE PrismaLink Enclosures come preloaded with Alpine?s next-generation S-Series Subwoofers. Woofer Material: carbon fiber/polypropylen Enclosure Type: Sealed Color: Black Frequency Response: 25-215 Hz Power Range (RMS): 600W The KTX-LK10 Linking Kit streamlines the process of connecting two S2-SB10 enclosures to create a powerful dual-subwoofer system. It includes heavy-duty steel linking brackets and all necessary hardware for a secure and stable installation.