What is the wiring method for car audio?

[VanWalter]

First, connect the power supply. Connect the positive terminal from the battery to the positive terminal of the amplifier (+12V), and connect the GND to the negative terminal. Additionally, connect the control wire (to the ACC key). Then, connect the audio source. Take the audio source from the CD player or DVD, output it from the CD player to a high-to-low frequency converter, and then connect it to the amplifier. For using car audio at home, you first need a 220V AC to 12V DC regulated power supply with a current of 3A or higher. A car CD player combines CD, radio, and amplifier functions, so you only need to buy two speakers. For better sound quality, you can purchase four speakers, but you should also consider the number of channels supported by the car CD player. Low-end car CD players only support two speakers. Speakers should be 4 ohms, which is the most common impedance for car audio. Although 6-ohm and 8-ohm speakers can be used, they may not perform well and could potentially damage the equipment. Generally, the back of a car audio system has a complex socket, and without the corresponding plug, connecting the power supply and speaker outputs can be time-consuming and labor-intensive. It is recommended to purchase the corresponding socket on Taobao based on the audio model to make wiring more convenient. Finally, for aesthetic purposes, it is advisable to prepare a casing for the audio system. For most new head units on the market, the wire colors at the rear are defined according to international standards. Yellow: 12V power supply, connected to the constant live wire; Red: Power-on wire, connected to the ACC power line controlled by the key; Black: Ground, connected to the chassis or ground wire; Blue: Radio antenna activation wire, connected to the electric antenna activation wire or antenna amplifier power supply; Blue with white stripe: Remote power-on control wire, connected to the amplifier, processor, etc.; Orange: Illumination wire, connected to the car's small light wire; Pink: Mute wire, connected to the mute control terminal of other electronic devices; White: Front left speaker positive wire; White with black stripe: Front left speaker negative wire; Gray: Front right speaker positive wire; Gray with black stripe: Front right speaker negative wire; Purple: Rear right speaker positive wire; Purple with black stripe: Rear right speaker negative wire; Green: Rear left speaker positive wire; Green with black stripe: Rear left speaker negative wire.