Amazon.com: Rockville (2) W15K9D4 15" 10,000w Car Subwoofers Dual 4-Ohm Subs CEA Compliant : Electronics
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: 25W Woofer 4 Ohm Subwoofer Speaker, Bass Audio Column Loudspeaker For Home Theater : 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: Lanzar 6.5” Car Subwoofer Speaker - Black Non-Pressed Paper Cone, Aluminum Voice Coil, 4 Ohm Impedance, 600 Watt Power and Foam Edge Suspension for Vehicle Audio Stereo Sound System - MAXP64 : Electronics
Amazon.com: Focal SUB 10 Dual 10" Subwoofer, Dual 4-Ohm Voice Coil, 250W RMS - 500 W MAX : Electronics
Amazon.com: MTX 12" Shallow 300 Watts RMS 4 Ohm Subwoofer 3512-04S (35 Series) 3.375" Mounting Depth : Electronics
Amazon.com: KICKER CompRT 6.75"(165mm) Subwoofer, DVC, 4-ohm, RoHS Compliant : 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
Amazon.com: PowerBass XL-1240DMF - 12" Dual 4-Ohm Marine Subwoofer with Grill : 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: JBL Club WS1200 - 12” Shallow mount subwoofer w/SSI™ (Selectable Smart Impedance) switch from 2 to 4 ohm : 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: Healifty Full Range Speaker 4 Ohm 5w Mini DIY Audio Subwoofer Loudspeaker Computer Speakers Home Car Audio Speakers : 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 OZONE-10-D4 1600 Watts Car Subwoofer Dual 4 Ohm : Electronics
Amazon.com: CT Sounds TROPO-6.5-D4 400 Watts Max 6.5 Inch Car Subwoofer Dual 4 Ohm : Everything Else
Amazon.com: 2 Pack XR Series 15" Subwoofer 3000 Watts Max DVC 4 Ohm American Bass XR-15D4 : Electronics
Amazon.com: DD Audio 608F-D4 8" Dual 4-Ohm 3000W Subwoofer : Electronics
