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Amazon.com: CHOOYO 1.5 INCH 40MM Audio Speaker 4 Ohm 4W Full Range Neodymium Mini Altavoz for Flip 2 Harman Kardon Speakers Repair DIY 2PCS : Electronics
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Amazon.com: Gikfun 4Ohm 40mm Diameter 3W Full Range Audio Speaker Stereo Woofer Loudspeaker for Arduino (Pack of 2pcs) EK1794 : Electronics
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Amazon.com: MIYAKO USA (TS-416 4" Professional Grade Replacement for Speaker 50 watts Power at 4 ohms 10oz Magnet Round Speaker for Repairs Black (1 Pair) : Electronics
Amazon.com: CQRobot Speaker 3 Watt 4 Ohm Compatible with Arduino Motherboard, JST-PH2.0 Interface. It is Ideal for a Variety of Small Electronic Projects. : Electronics
Amazon.com - CHOOYO 4 Inch Audio Portable Woofer Speaker 4 Ohm 15W Rubber Edge Braided Basin Bass Loudspeaker Large Magnetic Horn 1PC
Amazon.com: Granvela 20W 3-inch Full Range 4-Ohm Speakers Pair of Flax-Fiber Cone for DIY Multimedia and Computer Speaker Systems : Electronics
Amazon.com: Rockville RSG15.4 15" 3-Way 1500 Watt 4-Ohm Passive DJ/Pro Audio PA Speaker, Black : Everything Else
Amazon.com: PRV AUDIO 3-inch Full-Range Neodymium Speaker 3MR40-NDY-4 PRO Audio Midrange with 40 Watts Power Handling, 4 Ohm, and Versatile Performance for Car Audio Applications (Single) : Electronics
Amazon.com: CT Sounds TROPO65-4 6.5” Shallow Mount Midrange Speaker, 175 Watts RMS, Each : Electronics
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: Healifty Full Range Speaker 4 Ohm 5w Mini DIY Audio Subwoofer Loudspeaker Computer Speakers Home Car Audio Speakers : Electronics
Amazon.com: Gikfun 2" 4Ohm 3W Full Range Audio Speaker Stereo Woofer Loudspeaker with 3.5mm Audio Cable Extension Volume Control DIY Kit EK1755 : Electronics
Amazon.com: GRS 3FR-4 Full Range 3" Speaker Driver 4 Ohm : Electronics