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55-4592 - 3 Inch 30W 4 Ohm Full Range Speaker: Amazon.com: Industrial & Scientific
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Amazon.com: Fielect 5W 4 Ohm DIY Magnetic Speaker Audio Speakers 77mm Diameter Round Shape Replacement Loudspeaker 1Pcs : Electronics
Amazon.com: Gikfun 4Ohm 40mm Diameter 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino (Pack of 2pcs) EK1794 : Electronics
Amazon.com: MakerHawk 2pcs Ar duino Speaker 5 Watt 8 Ohm Double Cavity Mini Speaker Full-Range Cavity Advertising Machine Small Speaker 3.3V 5V with JST-PH2.5mm-2 pin Interface : Electronics
