If my speaker wire is turning green inside, can i still use it?

Green speaker wire shows a sign, showing the speaker wire is turning bad and it needs replacing. If you see a green color inside the insulation of the speaker wire, it shows that the wire is damaged from copper oxide. Once the speaker wire turns green, the wire is no longer a decent electrical conductor. This is because the copper oxide is not a conductive substance as pure copper and it makes the signal sent to the speaker degraded. Although you can still use the green speaker wire for your audio needs, but you will have a decrease in sound quality.