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Amazon.com: Lanzar 8 inch Car Subwoofer Speaker - Black Non-Pressed Paper Cone, Aluminum Voice Coil, 4 Ohm Impedance, 800 Watt Power and Foam Edge Suspension for Vehicle Audio Stereo Sound System - MAXP84 : Electronics
Amazon.com: Facmogu 2PCS 8in Full Range Audio Speakers, RMS 50W Peak 120W, 4 Ohm Car Vehicle Audio Full Range Drivers, Wide Range DIY Loudspeaker Woofer Replacement - Red : Electronics
Amazon.com: Pack of 2 Full Range Bookshelf Speaker, 3 Inch 8 Ohm Anti-Magnetic HiFi Tweeter Wooden Enclosure Home Audio Woofer Multimedia Speakers (8Ω) : Electronics
Amazon.com: 5 CORE 15 inch Subwoofer Replacement PRO DJ Speaker Sub Woofer Loudspeaker Wide Full Range Loud Aluminum Frame 2200W PMPO, Magnet 90oz 8Ω 15-185 17 AL : Electronics
Amazon.com: CT Sounds MESO-8-D2 1600 Watts Max 8 Inch Car Subwoofer Dual 2 Ohm : Everything Else
Amazon.com: KICKER TRTP 10-inch (25cm) Thin Down Firing Subwoofer and Passive Radiator Enclosure, 2-Ohm, RoHS Compliant : Electronics
Amazon.com: Pack of 2 Full Range Bookshelf Speaker, 3 Inch 8 Ohm Anti-Magnetic HiFi Tweeter Wooden Enclosure Home Audio Woofer Multimedia Speakers (8Ω) : Electronics
Amazon.com: KICKER Comp 12" (30cm) Subwoofer in Down Firing Encl, 4-Ohm; RoHS Compliant : Electronics