Amazon.com: CT Sounds STRATO-8-D4 1200 Watts Max 8 Inch Car Subwoofer Dual 4 Ohm : Electronics
Amazon.com: PRV AUDIO 8 Inch Midbass Speaker 8MB450-4 v2, 450 Watts Program Power, 2 in Voice Coil, 4 Ohm, 225 Watts RMS Pro Audio Mid Bass Woofer (Single) : Electronics
Amazon.com: New Pair Soundstorm SS12 12" 800W Car Audio Subwoofer 4 Ohm SVC Bass Sub : Electronics
Amazon.com: Alpine S-W8D4 8" 900w Car Audio Subwoofer DVC Dual 4-Ohm Sub+Bluetooth Speaker : Electronics
Amazon.com: Massive Audio GTX84 – 8 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 8" Subwoofer 400 Watt RMS, 800w MAX Dual 4 Ohm, 2 Inch Voice Coil. Sold Individually : Electronics
PIONEER 12” Dual 4 ohms Voice Coil Subwoofer
Amazon.com: 6.5 Inch Car Woofer Speaker - 300 Watt High Powered White Injected Polypropylene Cone Car Audio Sound Component Speaker System w/ High-Temperature Kapton Voice Coil, 4 Ohm, 40oz Magnet - Pyramid
Amazon.com: CT Sounds Meso-6.5-D4 6.5 Inch Car Subwoofer Dual 4 Ohm, 800 Watts Max : Everything Else
Amazon.com: Rockford Fosgate P3D4-12 Punch P3 DVC 4-Ohm 12-Inch 600-Watt RMS 1200-Watt Peak Subwoofer : 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: Rockville RVW1800P4 1800w Raw DJ Subwoofer 4 Ohm Sub Woofer 107OZ Magnet, 18" : Electronics
Amazon.com: BOSS Audio Systems CXX10 Car Subwoofer - 800 Watts Maximum Power, 10 Inch Subwoofer, Single 4 Ohm Voice Coil, Sold Individually : Electronics
KICKER L7S84 L7S 8" Subwoofer Dual Voice Coil 4-Ohm 450W
Amazon.com: Audiopipe 15" Woofer 1000W Max 4 Ohm DVC : Electronics
Amazon.com: Lanzar 10in Car Subwoofer Speaker Non-Pressed Paper Cone, Stamped Plastic Basket, Dual 4 Ohm Impedance for Vehicle Audio Stereo Sound System MAXP104D : Everything Else
DS18 SLC12S Car Subwoofer Audio Speaker - 12" in. Paper Glass Fiber Cone, Black Steel Basket, Single Voice Coil 4 Ohm Impedance, 500W MAX Power and Foam Surround for Vehicle Stereo Sound System
Amazon.com: Gravity Audio 1200W Professional 12" Power Car Subwoofer 4 OHM IMPED Dual Voice Coil GR-12PW : Electronics
Amazon.com: Skar Audio SDR-12 D4 12" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: Planet Audio BBD12B 12 Inch Car Subwoofer - 2500 Watts Maximum Power, Dual 4 Ohm Voice Coil, Sold Individually, Black : Electronics
Amazon.com: GRS 3FR-4 Full Range 3" Speaker Driver 4 Ohm : Electronics
Amazon.com: CT Sounds OZONE-10-D4 1600 Watts Car Subwoofer Dual 4 Ohm : Electronics
Amazon.com: Rockville RVW1800P4 1800w Raw DJ Subwoofer 4 Ohm Sub Woofer 107OZ Magnet, 18" : 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: Dayton Audio DCS165-4 6-1/2" Classic Subwoofer 4 Ohm : Electronics
Amazon.com: Sound Town 15" 450W Raw Woofer Speaker with 4" Voice Coil, 100 oz Magnet, Replacement Woofer for PA/DJ Subwoofer, 4-ohm (STLF-1504-4) : Musical Instruments
Amazon.com: GRS 10SW-4 10" Poly Cone Subwoofer 4 Ohm : Electronics
Amazon.com: Pyle 10" Car Audio Speaker Subwoofer - 1000 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System - Non Press Paper Cone, 90 dB, 4 Ohm, 50 oz Magnet, 2
