Alpine Type-R R2-W12D4 12" 750w RMS Car Audio Subwoofer+Vented Sub Box Enclosure | eBay
Alpine RS-W10D4 | Pacific Stereo
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Amazon.com: Alpine W10S4 10" 750 Watt Peak 250 Watt RMS 4-Ohm Car Audio Subwoofer Sub : Electronics
Universal Car Stereo Slotted S Port Dual 8" Alpine Type S S-W8D2 Sub Box Enclosure - Final 2 Ohm | ALPINE-PACK1A
Amazon.com: Universal Car Stereo Vented Port Single 12" Alpine S-W12D4 Type S Car Audio Subwoofer Custom Sub Box Enclosure Package New Without Amp : Electronics