How to Add a Line-In and Bluetooth to old Stereo Systems (1)

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Earlier Videos about Audio Hacks: Old Radios-Line-In-Hack: https://www.youtube.com/watch?v=nKbYu_80Afg Car Stereo Line-In Hack: https://www.youtube.com/watch?v=a32neZo3McY Car Stereo Bluetooth-Hack: https://www.youtube.com/watch?v=oRMmth6itGc Car Stereo-Home Stereo-Conversion: https://www.youtube.com/watch?v=j3AAMxfdWWQ ... https://www.youtube.com/watch?v=5K0he6zbebM