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: 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 Single 10-Inch Comp 4 Ohm 150W Loaded Subwoofer Enclosure Box | 43TC104 : Electronics
Amazon.com: Rockford Fosgate R2D4-12 12" 1000W 4 Ohm Subwoofers (Pair) + Dual Vented Sub Box : Electronics
Amazon.com: KICKER Black OEM Replacement Marine 6.5" 4 Ohm Coaxial Speakers : Electronics
Amazon.com: Pyramid BNPS122 12" 1200W Car Audio Speakers with Neon Accent Lighting and 4 OHM Impedance, Subwoofer Box, 1500W Mono Amplifier, & Amp Kit : 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: Cerwin Vega 10" Subwoofer 800W Max 4 Ohm DVC : Electronics
Amazon.com: BOSS Audio AVA-6200 80 Watt 3-Way 4-Ohm Car Audio Box Speakers AVA6200 (4 Pack) : Electronics
Amazon.com: KICKER 12-Inch 600 Watt 4 Ohm CompC Vented Loaded Subwoofer Enclosure, 44VCWC124 : 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: WEIJ 10W 4 Ohm External Magnet Speaker Loudspeaker 75mm x 30mm 2Pcs : 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 Bundle Compatible With Universal Vehicle 44CWCD124 12" Dual 4Ohm 12" With 46CXA4001 800W Sub Amp AND 112VH 12" Sub Box : Electronics
Amazon.com: Skar Audio EVL-8 D4 8" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
Amazon.com: KICKER 2 43C124 12" 600W Car Audio Subwoofers Subs 4 Ohm + Dual Sealed Sub Box : Electronics
Amazon.com: Skar Audio VD-10 D4 10" 800W Max Power Dual 4 Ohm Shallow Mount Car Subwoofer : Everything Else
Amazon.com: 2) Rockville SBG1124 12" 600 Watt Passive 4-Ohm Pro DJ Subwoofers,MDF/Pole Mount : Musical Instruments
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Amazon.com: ROCKFORD FOSGATE P3D4-12 12" 2400 Watt 4-Ohm DVC Car Subwoofers (2 pack) and QBASS12 Dual 12" Vented Ported Subwoofer Sub Box Enclosure : 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: Black Diamond Car Audio 15" Bass Subwoofer 4-Ohm Dvc 600 Watts DIA-15D4 : Electronics
Amazon.com: Fielect 4Pcs 5W 4 Ohm DIY Magnetic Speaker Audio Speakers 77mm Diameter Round Shape Replacement Loudspeaker : Electronics
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 VS8K54 8" K5 800w Car Subwoofer in Vented Sub Enclosure Box-4 Ohm : Everything Else
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
