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Amazon.com: Timibis 4 Pole 3.5mm Male Repair Headphone Jack Plug Metal Audio Soldering & Spring Tool Kits : Electronics
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audio - Which color should be soldered to which connector for an earphone jack - Electrical Engineering Stack Exchange
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How to solder this 4 pole jack to headphone wires? (One copper, one copper and blue coming from same hole, one red, one green wire) : r/diyaudio
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