I have no idea where I can buy this kind of cable
So I was repairing a speaker and I had to replace the aux cable. However this cable has 3 wires inside, a red one, a white one and a black one (these are inside the cable itself). So today I decided to cut open one of my own and I realised it only has a white and a red cable.
So my question is: "Where can I buy that kind of cable?" And how is that sort of cable called?