10Pcs 3.5mm Female Audio Connector 4 Pin SMT Phone Jack PJ3020D | eBay
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Poyiccot 3.5mm Speaker Wire Adapter, 3.5mm (1/8") 4 Pole Stereo TRRS Male Jack to AV 4 Screw Terminal Block Balun Connectors Cable 30cm (3.5mm M/ 4pin) : Amazon.ca: Electronics
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If you were to wire a 4 pin audio cable to a 3 pin jack which two wires would be joined? Eg. TP120 jack being replaced with a 3.5mm jack. - Quora
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