Amazon.com: PSW10A-D4 - DD Audio 10" 1800W Dual 4-Ohm Subwoofer : Electronics
Amazon.com: Skar Audio EVL-65 D4 6.5" 400 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: Pyle Car Subwoofer Audio Speaker - 8in Non-Pressed Paper Cone, Black Plastic Basket, Dual Voice Coil 4 Ohm Impedance, 800 Watt Power and Foam Surround for Vehicle Stereo Sound System -
Amazon.com: Hifonics HFX12D4-PAIR 400-Watt 12-Inch HF Series Dual 4-OHM Subwoofer, Set of 2 : Electronics
Amazon.com: GRS 10SW-4 10" Poly Cone Subwoofer 4 Ohm : Electronics
Amazon.com: Skar Audio VD-12 D4 12" 800W Max Power Dual 4 Ohm Shallow Mount Car Subwoofer : Electronics
Amazon.com: American Bass 8" HD Series 800W Max Dual 4 Ohm Subwoofer HD-8-D4-V2 : 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: MTX 12" Shallow 300 Watts RMS 4 Ohm Subwoofer 3512-04S (35 Series) 3.375" Mounting Depth : Electronics
Sundown Audio U-6.5SW-D4 6.5" Dual 4-Ohm 400W Subwoofer : Electronics - Amazon.com
Amazon.com: PowerBass XL-1240DMF - 12" Dual 4-Ohm Marine Subwoofer with Grill : Electronics
Amazon.com: KICKER CompRT 6.75"(165mm) Subwoofer, DVC, 4-ohm, RoHS Compliant : 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
Amazon.com: Skar Audio SDR-10 D4 10" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: DD Audio 1110-D4 10" 800W 4-Ohm Subwoofer : 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: Sundown Audio SD-4 8 D4 8" 400W RMS Dual 4 Ohm 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: MTX TN10-04 10-Inch Single 4-OHM Subwoofer 150-Watt RMS Black : Electronics
Amazon.com: Sundown Audio E-15 v4 D4 15 500W RMS Dual 4-Ohm Subwoofer ,(E-15v4D4) : Electronics
Amazon.com: DD Audio 608F-D4 8" Dual 4-Ohm 3000W Subwoofer : 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: 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: 25W Woofer 4 Ohm Subwoofer Speaker, Bass Audio Column Loudspeaker For Home Theater : Electronics
Amazon.com: NVX VCW124v3 12" 2400 Watt Peak (1200W RMS) Dual 4-Ohm VC-Series Car Subwoofer (VCW124 Version 3) : Electronics
Amazon.com: Focal SUB 10 Dual 10" Subwoofer, Dual 4-Ohm Voice Coil, 250W RMS - 500 W MAX : Electronics
Amazon.com: Harmony Audio HA-R124 Car Stereo Rhythm Series 12" Sub 600W Single 4 Ohm Subwoofer : Electronics
