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Amazon.com: Skar Audio EVL-65 D4 6.5" 400 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
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Amazon.com: Audiopipe TXX-BDC4-8 8 Inch 1000 Watt High Performance Powerful 4 Ohm DVC Vehicle Car Sub Audio Subwoofer Speaker System, Black : Electronics
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Amazon.com: Hifonics HFX12D4-PAIR 400-Watt 12-Inch HF Series Dual 4-OHM Subwoofer, Set of 2 : Electronics
Sundown Audio U-6.5SW-D4 6.5" Dual 4-Ohm 400W Subwoofer : Electronics - Amazon.com
Amazon.com: MTX TN10-04 10-Inch Single 4-OHM Subwoofer 150-Watt RMS Black : Electronics
Amazon.com: 2 Pack XR Series 15" Subwoofer 3000 Watts Max DVC 4 Ohm American Bass XR-15D4 : Electronics
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Amazon.com: Pyle 8 Inch 1600 Watt DVC 4 Ohm Car Audio Subwoofer Speaker Set with 40 Oz Magnet and 1.5 Inch 4 Layer Voice Coil, Black (2 Pack) : Electronics
Amazon.com: PSW10A-D4 - DD Audio 10" 1800W Dual 4-Ohm Subwoofer : Electronics
Amazon.com: GRS 10SW-4 10" Poly Cone Subwoofer 4 Ohm : Electronics
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Amazon.com: Focal SUB 10 Dual 10" Subwoofer, Dual 4-Ohm Voice Coil, 250W RMS - 500 W MAX : Electronics
Amazon.com: H YANKA 12 Inch Subwoofer - 12 Inch Paper Cone Subwoofer Car Audio, Black Steel Basket, Dual Voice Coil 4 Ohm Impedance 12 subwoofer, 1600W MAX Power 12 inch Competition Subwoofer : Electronics
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Amazon.com: Healifty Full Range Speaker 4 Ohm 5w Mini DIY Audio Subwoofer Loudspeaker Computer Speakers Home Car Audio Speakers : Electronics
Amazon.com: 5 CORE 10 Inch Subwoofer 85W RMS Full Range Pro Audio Speaker 4 Ohm Car Subwoofers 1” CCAW Voice Coil Sub Woofer w 23 oz Magnet for Car RV DJs Home
Amazon.com: Rockville (2) W15K9D4 15" 10,000w Car Subwoofers Dual 4-Ohm Subs CEA Compliant : Electronics
