Amazon.com: Alpine SWT-12S4 1000 Watt 12" Car Audio Bass Tube Subwoofer Bundle with Amplifier and Amp Kit : Electronics
Alpine PWE-S8 - Subwoofer - for car - 120 Watt - 8" - Walmart.com
Car enclosed subwoofer 12 "30 cm ALPINE SBG-1244BR sound electronics columns 89.8dB subwoofers for cars acoustics auto audio parts components speaker _ - AliExpress Mobile
Customer Reviews: Alpine X-W12D4 X-Series 12" subwoofer with dual 4-ohm voice coils at Crutchfield
ALPINE R-W12D2 R-SERIES 12" SUBWOOFER WITH DUAL 2-Ohm VOICE COILS 2250 WATTS NEW | eBay
Alpine 8" Powered Subwoofer System Black PWE-S8 - Best Buy