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
Amazon.com: H YANKA 12 Inch Subwoofer - 12 Inch Paper Cone Subwoofer Car Audio, Black Aluminum Basket, Dual Voice Coil 4 Ohm Impedance 12 subwoofer, 1600W MAX Power 12 inch Competition Subwoofer : Electronics
Amazon.com: JBL Club WS1200 - 12” Shallow mount subwoofer w/SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm : Electronics
Amazon.com: Hifonics HFX12D4-PAIR 400-Watt 12-Inch HF Series Dual 4-OHM Subwoofer, Set of 2 : Electronics
Amazon.com: Alpine W12S4 12-inch Single 4 Ohm Subwoofer Bundle : Electronics
Amazon.com: NVX VCW124v3 12" 2400 Watt Peak (1200W RMS) Dual 4-Ohm VC-Series Car Subwoofer (VCW124 Version 3) : Electronics
Amazon.com: CT Sounds TROPO-6.5-D4 400 Watts Max 6.5 Inch Car Subwoofer Dual 4 Ohm : Everything Else
Amazon.com: Healifty Full Range Speaker 4 Ohm 5w Mini DIY Audio Subwoofer Loudspeaker Computer Speakers Home Car Audio Speakers : Electronics
Amazon.com: DD Audio 608F-D4 8" Dual 4-Ohm 3000W Subwoofer : Electronics
Sundown Audio U-6.5SW-D4 6.5" Dual 4-Ohm 400W Subwoofer : Electronics - Amazon.com
Amazon.com: Focal Sub P20FSE 8" Expert Flax Shallow-Mount 4-Ohm Subwoofer : Electronics
Amazon.com: Gravity 2X 10 Inch 1500 Watt Car Audio Subwoofer w/ 4 Ohm DVC 10 in. Sub - Pair - Feature Dual Voice Coil, Thick Magnet, Design for Car, ATV, Van, High Performance Car Show : Electronics
Amazon.com: Sundown Audio SD-4 8 D4 8" 400W RMS Dual 4 Ohm Subwoofer : Electronics
Amazon.com: MTX TN10-04 10-Inch Single 4-OHM Subwoofer 150-Watt RMS Black : Electronics
Amazon.com: Skar Audio EVL-65 D4 6.5" 400 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: Skar Audio VD-12 D4 12" 800W Max Power Dual 4 Ohm Shallow Mount Car Subwoofer : 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: American Bass 8" HD Series 800W Max Dual 4 Ohm Subwoofer HD-8-D4-V2 : Electronics
Amazon.com: Gravity 2X 6.5 Inch 600 Watt Car Audio Subwoofer w/ 4 Ohm DVC 6.5" Sub Pair - Feature Dual Voice Coil, Thick Magnet, Design for Car, ATV, Van, High Performance Car Show : Electronics
Amazon.com: Massive Audio SUMMOXL104-10 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 10" Subwoofer 1500 Watt RMS, 3000w MAX Dual 4 Ohm, 3 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: Skar Audio SDR-10 D4 10" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: 2 Pack XR Series 15" Subwoofer 3000 Watts Max DVC 4 Ohm American Bass XR-15D4 : Electronics
Amazon.com: wet sounds REVO 12 FA S4-B Black Free Air 12 Inch 4 Ohm Subwoofer, No Grille : Electronics
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
