Well In my Car (used) i recently bought the i couldn't hear the passenger speaker so i took my door apart to find that the wires had come un-done off of the speaker... the reason for that is because the wires were cut (most likely) when the previous owner put in the new speakers. What i did is take some wire i had laying around (its copper as well) but it has a single strand of copper and the plastic cover around it is slightly larger so it has a different ... gauge? and the wire thats already on my car has multiple strands of copper in one wire. But when i hooked it up and turned the radio on it seemed to work but i'm not entirely sure if thats safe... is there any chance it could harm the speaker, or anything? ... Catch fire while i'm driving?... ya kinda vital information...

-Thanks