If you mix up positive and negative speaker wires, the speakers will most likely produce no sound or a very low sound. This is because when the wrong wires are connected, the polarity is reversed and the speaker will be unable to create an electromagnetic field.

If you mix up positive and negative speaker wires, you will create a short circuit and the speakers will not work. If you're ever unsure about which wire is which, it's always a good idea to label them with stickers or some other means of identification. That way, there's no chance of making a mistake and damaging your equipment.