BNC to 6.35mm Headphone jack wiring - Electrical Engineering Stack Exchange
Understanding Audio Jack Switches and Schematics | CUI Devices
Making a [4-Pole TRRS to 3.5mm Stereo & Mic Adapter (Male to 2x Female)] from an iphone headphone split… | Earphones wire, Headphone splitter, Electronic schematics
SOLVED: Wiring speakers in a stereo headphone - Fixya
Understanding Audio Jack Switches and Schematics | CUI Devices