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Amazon.com: Rockford Fosgate P3D4-12 Punch P3 DVC 4-Ohm 12-Inch 600-Watt RMS 1200-Watt Peak Subwoofer : Electronics
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Amazon.com: Mini Hobby Speaker - 2 inch 4 Ohms : Electronics
Amazon.com: PRV AUDIO 8 Inch Midbass Speaker 8MB450-4 v2, 450 Watts Program Power, 2 in Voice Coil, 4 Ohm, 225 Watts RMS Pro Audio Mid Bass Woofer (Single) : Electronics
Amazon.com: PRV AUDIO 6.5 Inch Midrange Speaker 6MR500-NDY-4, 500 Watts Max Power, 4 Ohm, 2 in Voice Coil, 250 Watts RMS, Neodymium Magnet, Smooth Full Range Response Through 13kHz for Car Audio
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Amazon.com: Cylewet 2Pcs 2inch 4Ohm 10W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino (Pack of 2) CYT1116 : Electronics
Amazon.com: Fielect 5W 4 Ohm DIY Magnetic Speaker Audio Speakers 77mm Diameter Round Shape Replacement Loudspeaker 1Pcs : Electronics
Amazon.com: Pyle Car Three-Way Speaker System - Pro 4 x 6 Inch 180W 4 Ohm Mid Tweeter Component Audio Sound Speakers For Car Stereo w/ 30 Oz Magnet Structure, 2” Mount Depth
Amazon.com: Skar Audio FSX10-4 10" 300 Watt 4 Ohm Pro Audio Midrange Loudspeaker, Each : Everything Else
Amazon.com: Rockville (2) RXM64 6.5" 300w 4 Ohm Mid-Range Drivers Car Speakers Mid-Bass : Electronics
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Amazon.com: NVX VCW104v3 (VCW104 Version 3) 1600 Watt Peak (800W RMS) 10" VC-Series v3 Dual 4-Ohm Car Subwoofer : Electronics
Amazon.com: 15" Subwoofer 1000W Single 4 Ohm Bass Pro Car Audio American Bass DX-15 : Electronics
Amazon.com: Fielect 2Pcs DIY Magnetic Speaker 3W 4 Ohm Full Range Audio Speaker Stereo Woofer Loudspeaker Replacement for Arduino, 52mm Diameter : Electronics
Amazon.com: Pyle Car Two Way Speaker System - Pro 6.5 Inch 240 Watt 4 Ohm Mid Tweeter-Audio Sound Speakers For Car Stereo w/ 30 Oz Magnet Structure, 2.25” Mount Depth Fits Standard
Amazon.com: Gikfun 2" 4Ohm 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino (Pack of 2pcs) EK1725 : Electronics
Amazon.com: Harmony Audio HA-R104 Car Stereo Rhythm Series 10" Sub 500W Single 4 Ohm Subwoofer : Electronics
Amazon.com: Seismic Audio - SA-SBL104-10 Inch Dual 4 Ohm Slim Mount Car Audio Subwoofer 400 Watts Max Power : Everything Else
Amazon.com: Visaton FR10WP-4 Outdoor 4" Full-Range Speaker 4 Ohm Black : Electronics
Amazon.com: Facmogu 3 inch Tweeter Speakers HiFi Full Range Woofer Loudspeaker, 2 PCS 4 Ohm Anti-Magnetic Speakers for 2.0/2.1 Boom Box Satellites Speaker DIY (4Ω) : Electronics
Pioneer TSW312D4 Champion Series 12" 1500 Watt Dual 4 Ohm Voice Coil DVC Car Subwoofer : Electronics - Amazon.com
Amazon.com: (2) Skar Audio FSX8-4 350-Watt 8-Inch 4 Ohm MID-Range Loudspeakers - 2 Speakers : Electronics
Amazon.com: uxcell 3W 4 Ohm Metal Housing Round Magnet Speaker Loudspeaker 2Pcs : Electronics
