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Amazon.com: Skar Audio SDR-10 D4 10" 1200 Watt Max Power Dual 4 Ohm Car 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: Black Diamond Car Audio 15" Bass Subwoofer 4-Ohm Dvc 600 Watts DIA-15D4 : Electronics
Amazon.com: Skar Audio EVL-8 D4 8" 1200 Watt Max Power Dual 4 Ohm Car Subwoofer : Electronics
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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: Fosi Audio BT20A Bluetooth 5.0 Stereo Audio 2 Channel Amplifier Receiver and Box X1 MM Phono Preamplifier : Electronics
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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: KICKER 44CWCS104 CompC 10" 500W Single 4-Ohm Car Subwoofer Bundle with Rockville RSV10 Single Vented Subwoofer Enclosure Box and Single Sub Box Enclosure Installation Kit : 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: BOSS Audio AVA-6200 80 Watt 3-Way 4-Ohm Car Audio Box Speakers AVA6200 (4 Pack) : Electronics
Amazon.com: Rockville SBG1184 18" 1000 Watt Passive 4-Ohm Pro DJ Subwoofer, MDF/Pole Mount : Musical Instruments
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 inch 1200 Watt 4-Ohm DVC Car Audio Subwoofer and Q Power 12 inch Single Heavy Duty Vented Subwoofer Enclosure Box : Electronics
Amazon.com: Rockville VS8K54 8" K5 800w Car Subwoofer in Vented Sub Enclosure Box-4 Ohm : Everything Else
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: Skar Audio VD-8 D4 8" 600W Max Power Dual 4 Ohm Shallow Mount Car Subwoofer : Everything Else
