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Amazon.com: Dweii 4 PCS Speaker 3 Watt 8 Ohm Mini Speaker 8ohm 3w Loundspeaker Micro Speaker for Arduino with JST-PH2.0 Interface for Small Electronic Projects Advertising Machines LCD TV Monitors : Electronics
Amazon.com: CQRobot Miniature Loudspeaker 3 Watt 8 Ohm Passive Enclosed Audio Speaker Woofer Speaker Compatible with Arduino Board. JST-PH 2.0 mm 2-Pin Interface, for a Variety of Small DIY Electronic Projects. : Electronics
Amazon.com: Skar Audio FSX8-4 8" 350 Watt 4 Ohm Pro Audio Midrange Loudspeaker, Each : Electronics
Amazon.com: Eminence Patriot 820H 8" Guitar Speaker with Hemp Cone, 20 Watts at 4 Ohms,Black : Musical Instruments
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Amazon.com: Pyle 8 Inch 1600 Watt DVC 4 Ohm Car Audio Subwoofer Speaker Set with 40 Oz Magnet and 1.5 Inch 4 Layer Voice Coil, Black (2 Pack) : Electronics
Amazon.com: Visaton SL87 FE-8 Ohm 3.4" Full Range Speaker 8 Ohm : Electronics