Customer Reviews: Alpine S-W10D4 S-Series 10" subwoofer with dual 4-ohm voice coils at Crutchfield
Alpine - PWE-S8 Powered 8-inch (20cm) Quad-Coil Subwoofer Box with auto-sensing Speaker inputs and built-in 240W Amplifier
Universal Car Stereo Single 12" Alpine Bundle Type S S-W12D4 Bundle with Rearfire Sealed Sub Box Enclosure with Harmony HA-A800.1 Amplifier & 4GA Amp Kit - Walmart.com
Alpine S-DB8V-TRK Halo Series 8" ported dual subwoofer enclosure with two 8" S-Series subwoofers at Crutchfield
Alpine SWS-1023D Type-S 10" subwoofer with dual 2-ohm voice coils at Crutchfield
Alpine R-SB10V Halo Series 10" linkable ported subwoofer enclosure at Crutchfield
Car Enclosed Subwoofer 8 "20 Cm Alpine Sbg-844br Sound Electronics Columns 87db Subwoofers For Cars Acoustics Auto Audio Parts Components Speaker - Subwoofers - AliExpress
ALPINE R2-W8D4 8" SUB 1000W SUBWOOFER DUAL 4-OHM BASS CAR AUDIO SPEAKER NEW | eBay
Alpine R-Series R2-W10D4 10 Inch Dual 4-Ohm Voice Coils Subwoofer with 750W RMS
Amazon.com: Universal Car Stereo Rearfire Sealed Dual 12" Alpine S-W12D2 Type S Car Audio Subwoofers Custom Sub Box Enclosure Package New : Electronics
Amazon.com: Alpine SWT-12S4 1000 Watt 12" Car Audio Bass Tube Subwoofer Bundle with Amplifier and Amp Kit : Electronics