1. Red: This color is typically used for the positive (+) terminal of the speaker.
2. Black: This color is typically used for the negative (-) terminal of the speaker.
3. Green: This color is sometimes used for the ground terminal of the speaker.
4. White: This color is sometimes used for the neutral terminal of the speaker.
Note that the color coding of speaker wires may vary depending on the manufacturer, so it's important to refer to the specific product documentation to confirm the correct wiring code.