Amazon.com: Alpine Two R2-SB10V Next-Gen 10" R-Series Halo Loaded Sub Enclosures with KTX-H10 Link Kit : Electronics
Universal Car Stereo Slotted S Port Single 10" Alpine Bundle Type R R-W10D4 Sub Box Enclosure with Harmony HA-A800.1 Amplifier & 4GA Amp Kit - Walmart.com
Ported Sub Box Subwoofer Enclosure for 2 10" Alpine Type R SWR-10 Subs Recessed | eBay
Alpine Halo R2-Series Dual 10" Voice Coil 4-Ohm Loaded Subwoofer Enclosure Black R2-SB10V - Best Buy
Alpine RS-SB10 Halo R-Series sealed enclosure with 10" 2-ohm shallow-mount subwoofer at Crutchfield