Alpine R-SB12V Halo Series 12" linkable ported subwoofer enclosure at Crutchfield
Universal Car Stereo Hatchback Sealed Dual 12" Alpine Bundle Type S S-W12D2 Sub Box Enclosure with Harmony HA-A800.1 Amplifier & 4GA Amp Kit - Walmart.com
ALPINE RS-SB10 10” HALO 1800w Shallow Slim Loaded Subwoofer in Sub Box Enclosure - Walmart.com
Alpine SWR-T12 12" 1800W Shallow Mount Subwoofer+Car/Truck Sub Enclosure Box - Walmart.com