Amazon.com: Rockford Fosgate R2D4-12 12" 1000W 4 Ohm Subwoofers (Pair) + Dual Vented Sub Box : Electronics
Amazon.com: Skar Audio VD-8 D4 8" 600W Max Power Dual 4 Ohm Shallow Mount Car Subwoofer : Everything Else
Amazon.com: Fielect 4Pcs 5W 4 Ohm DIY Magnetic Speaker Audio Speakers 77mm Diameter Round Shape Replacement Loudspeaker : Electronics
Amazon.com: BOSS Audio AVA-6200 80 Watt 3-Way 4-Ohm Car Audio Box Speakers AVA6200 (4 Pack) : Electronics
Amazon.com: Kicker Single 10-Inch Comp 4 Ohm 150W Loaded Subwoofer Enclosure Box | 43TC104 : Electronics
Amazon.com: Skar Audio EVL-8 D4 8" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: 12" 1200W Car Audio Subwoofer - 2 Way Neon Bandpass Speaker System w/ Blue Lights, DC 12V Input/4 Ohm/32Hz-1KHz Freq.Res w/ Plexi-Glass Front Window & Silver Polypropylene Cone - Pyramid BNPS122 :
Amazon.com: 2) Rockville SBG1124 12" 600 Watt Passive 4-Ohm Pro DJ Subwoofers,MDF/Pole Mount : Musical Instruments
Amazon.com: KICKER Comp 12" (30cm) Subwoofer in Down Firing Encl, 4-Ohm; RoHS Compliant : Electronics
Amazon.com: KICKER 12-Inch 600 Watt 4 Ohm CompC Vented Loaded Subwoofer Enclosure, 44VCWC124 : Electronics
Amazon.com: Harmony Audio HA-F104 Car Stereo Flatline Series 10" Sub 700W Single 4 Ohm Subwoofer : Electronics
Amazon.com: JBL GT-12BP Passive 1200W 12 GT Series 4-Ohm Loaded Ported Bandpass Subwoofer Enclosure with Red LED Illumination with Gravity Magnet Phone Holder Bundle : Electronics
Amazon.com: ORION Cobalt CO525C 5.25” 4 OHM 2-Way System 50 Watts RM Coaxials Series CO Speakers Car Audio Stereo Set of 2 Speakers : Electronics
Amazon.com: ALPHASONIK AS10DF 10 inch 1200 Watts 4-Ohm Down Fire Shallow Mount Flat Enclosed Sub woofer for Tight Spaces in Cars and Trucks, Slim Thin Loaded Subwoofer Air Tight Sealed Bass Enclosure :
Amazon.com: BOSS Audio Systems CX122 1400 Watt Car Subwoofer, 12 Inch, Single 4 Ohm Voice Coil, 12 inch subwoofer Box Ready : Electronics
Amazon.com: KICKER 44VCWC124 CompC 12 Inch 600 Watt 4 Ohm Compact Vented Loaded Thin Profile Car Audio Subwoofer Enclosure Box with Ported Design : Electronics
Amazon.com: Black Diamond Car Audio 15" Bass Subwoofer 4-Ohm Dvc 600 Watts DIA-15D4 : Electronics
Amazon.com: Rockford Fosgate R2SD4-10 10 inch 800 Watt 4 Ohm Subwoofers (2 Pack) and Q Power QTW10 10 inch Single Sealed Car Audio Subwoofer Box Enclosure (2 Pack) : Electronics
Amazon.com: QPower QBOMB12V Dual 12" Vented Ported Sub Box & Bedliner Spray with Boss Audio P126DVC Phantom 12" 2300 Watt Max Power 4 Ohm DVC Car Audio Subwoofer : Electronics
Amazon.com: KICKER 43C124 12-Inch 600W 4-Ohm COMP Car Audio Subwoofers (2 Pack) and Q-Power QBOMB12V Dual Vented Subwoofer Box Enclosure with Black Bedliner Spray : Electronics
Amazon.com: KICKER 43VC124 Comp 12" Subwoofer in Vented Sub Box Enclosure, 4 -Ohm Bundle with Rockville RWK81 8 Gauge Amp Installation Kit and RXA-T1 Car Stereo Amp : Electronics
Amazon.com: Skar Audio VD-10 D4 10" 800W Max Power Dual 4 Ohm Shallow Mount Car Subwoofer : Everything Else
