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Amazon.com: Rockford Fosgate R2D2-12 12" 500W 2-Ohm Car Audio Power Subwoofer Sub (4 Pack) : Electronics
Amazon.com: Genius Audio GMP-100.4D Compact Mini Plus Car Audio Amplifier 1500 Watts Max Class D 4 Channel Amp 2 Ohm Stable with Power Protection System and Bass Boost for Speaker and Woofer
Amazon.com: DS18 Elite-Z ZR6.2D 6.5" Car Subwoofer 600 Watts Max Power Dual Voice Coil 2-Ohm Easy Mounting - High Performance Bass for Your Vehicle Sound System (1 Speaker) : Everything Else
Amazon.com: Skar Audio EVL-65 D2 6.5" 400 Watt Max Power Dual 2 Ohm Car Subwoofer : Electronics
Amazon.com: BOSS Audio Systems P126DVC Phantom 12-Inch 2300 Watts 4 Ohm Dual Copper Voice Coal Car Audio Stereo Subwoofer Speaker with Poly Injection Cone : Electronics
Amazon.com: Car Vehicle Subwoofer Audio Speaker - 15 Inch Competition Grade Pressed Paper Cone, 2 Ohm DVC, Advanced Air Flow, 3500W Power for Stereo Sound System - Gravity Warzone GW15D2 (1 Subwoofer) : Electronics
Amazon.com: Alpine ALP19-R-W12D2x2wKit Car Audio Type R Dual 2 Ohm 1500 Watt 12" Subwoofers with Sub Install Kit and HA-SWKD Dual Sub Box Install Kit - 16 Screws and Speaker Wire with
Amazon.com: Skar Audio IX-8 D2 8" 300 Watt Max Power Dual 2 Ohm Car Subwoofer : Electronics
Amazon.com: 1x Gravity 10 Inch 1500 Watt Car Audio Subwoofer w/ 2 Ohm DVC Power 10 in. Sub - Feature Dual Voice Coil, Thick Magnet, Design for Car, ATV, Van, High Performance Car Show : Electronics
Amazon.com: Seismic Audio - SA-LAF082-8 Inch Dual 2 Ohm Car Audio Subwoofer 1000 Watt Max Power : Everything Else
Amazon.com: Skar Audio IX-12 D2 12" 500 Watt Max Power Dual 2 Ohm Car Subwoofer : Electronics
Amazon.com: American Bass XR-12D2 12" 2,400 Watts Max Power Dual 2 Ohm Car Subwoofer : Electronics
Amazon.com: DS18 HOOL-X15.2DSPL Hooligan X 15 Inch SPL Car Audio Subwoofer 4000 Watts Rms 4" Dual Voice Coil 2-Ohm DVC 2+2 Ohm (1 Speaker) : Electronics
Amazon.com: AudioPipe TXX-BDC4-15D 15 Inch 2,800 Watt High Performance Powerful Dual 2 Ohm DVC Vehicle Car Audio Subwoofer Speaker System, Black : Electronics
Amazon.com: CT Sounds TROPO-12-D2 1300 Watts Max 12 Inch Car Subwoofer Dual 2 Ohm : Everything Else
Amazon.com: Pyle 6.5 Inch Mid Bass Woofer Sound Speaker System - Pro Loud Range Audio 300 Watt Peak Power w/ 4 Ohm Impedance and 60-20KHz Frequency Response for Car Component Stereo PLG64 : Electronics
Amazon.com: Skar Audio SVR-15 D2 15" 1600 Watt Max Power Dual 2 Ohm Car Subwoofer, 15" - Dual 2 Ohm : Electronics
Amazon.com: DS18 ZXI-62C 6.5" 2- Way Car Audio Component Speaker System with Kevlar Cone - Set of Woofer, Crossover & Tweeter : Electronics
Amazon.com: Car Vehicle Subwoofer Audio Speaker - 15 Inch Competition Grade Pressed Paper Cone, 2 Ohm DVC, Advanced Air Flow, 9600W Power for Stereo Sound System - Gravity Warzone G715D2 (2 Subwoofers) : Electronics