Best Buy: Alpine 10" Single-Voice-Coil 4-Ohm Subwoofer SWE-1042
Alpine Sws-1042d 10" High Performance Dual Voice Coil Subwoofer for sale online | eBay
Alpine 10 Inch Type-R Subwoofer (R-W10D4/D2) | SK Customs Car Audio & Home Theater | Atlanta | Norcross | Duluth | John's Creek
Alpine S-W10D4 10" Subwoofer S-series w / Dual 4-Ohm Voice Coils — Automotive Sound and Protection
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
SWR-10D4 - Alpine 10" Dual 4-Ohm Type-R Series Subwoofer