Amazon.com: 2X SoundXtreme ST-412 Premium Elite 12 Inch Car Audio Subwoofer 4000 Watts Max Power for Pair Dual 4 Ohm Voice Coil High Power Bass Surround Sound 12" Sub Speaker System Pair : Electronics
12″ Power Tuned Subwoofer (512d-D2) – Mobile Audio Network
DD Audio 3500 Series 12" - 1200w RMS Car Audio Subwoofer
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2) DD AUDIO 712d-D4 SUBS 12" 3600W DUAL 4-OHM CAR SUBWOOFERS BASS SPEAKERS NEW | eBay
DD AUDIO 812d-D2 12" SUB WOOFER 6000W DUAL 2-OHM CAR SUBWOOFER BASS SPEAKER NEW | eBay
DD Audio 3500 Series 12" - 1200w RMS Car Audio Subwoofer