Amazon.com: Skar Audio VD-8 D4 8" 600W Max Power Dual 4 Ohm Shallow Mount Car Subwoofer : Everything Else
Amazon.com: Rockville VS8K54 8" K5 800w Car Subwoofer in Vented Sub Enclosure Box-4 Ohm : Everything Else
Amazon.com: KICKER Comp 12" (30cm) Subwoofer in Down Firing Encl, 4-Ohm; RoHS Compliant : Electronics
Amazon.com: Harmony Audio HA-F104 Car Stereo Flatline Series 10" Sub 700W Single 4 Ohm Subwoofer : Electronics
Amazon.com: Skar Audio EVL-8 D4 8" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: Rockford Fosgate P3D4-12 12 inch 1200 Watt 4-Ohm DVC Car Audio Subwoofer and Q Power 12 inch Single Heavy Duty Vented Subwoofer Enclosure Box : Electronics
Amazon.com: Fielect 4Pcs 5W 4 Ohm DIY Magnetic Speaker Audio Speakers 77mm Diameter Round Shape Replacement Loudspeaker : Electronics
Amazon.com: Skar Audio SDR-10 D4 10" 1200 Watt Max Power Dual 4 Ohm Car 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: AudioPipe TXX-BDC4-12 12 Inch 2,200 Watt High Performance Powerful 4 Ohm DVC Vehicle Car Audio Subwoofer Speaker System, Black (2 Pack) : 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: 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: WEIJ 10W 4 Ohm External Magnet Speaker Loudspeaker 75mm x 30mm 2Pcs : Electronics
Amazon.com: Kicker Single 10-Inch Comp 4 Ohm 150W Loaded Subwoofer Enclosure Box | 43TC104 : Electronics
Amazon.com: Ciglow Full Range Speaker, 3 Inch 4ohm 5W Mini Full Frequency Audio Speaker Loudspeaker Home Stereo Woofer Loudspeaker for Multimedia Sound Box DIY. : 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: BOSS Audio Systems CX122 1400 Watt Car Subwoofer, 12 Inch, Single 4 Ohm Voice Coil, 12 inch subwoofer Box Ready : Electronics
Amazon.com: Rockville SBG1184 18" 1000 Watt Passive 4-Ohm Pro DJ Subwoofer, MDF/Pole Mount : Musical Instruments
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: Kicker Bundle Compatible With Universal Vehicle 44CWCD124 12" Dual 4Ohm 12" With 46CXA4001 800W Sub Amp AND 112VH 12" Sub Box : Electronics
Amazon.com: BOSS Audio AVA-6200 80 Watt 3-Way 4-Ohm Car Audio Box Speakers AVA6200 (4 Pack) : Electronics
Amazon.com: Cerwin Vega 10" Subwoofer 800W Max 4 Ohm DVC : Electronics
Amazon.com: uxcell 10W 4 Ohm 3 Inch 78x78x39mm Anti-Magnetic Speaker Tweeter Speakers 2pcs : Electronics
Amazon.com: Rockville K5 W15K5S4 15" 2000w 4 Ohm Car Audio Subwoofer Sub 500w RMS CEA Rated! Bundle with Rockville RGS15 Single 15" Sealed Car Sub Enclosure Box & Enclosure Installation Kit (3
