Car audio began to appear as early as fifty years ago. Up to now, it has evolved from the original car radio to a comprehensive multimedia in-vehicle electronic system that integrates audio-visual entertainment, communication, navigation, assisted driving and other functions, and has become an indispensable part of the car.

Car audio mainly includes car CD, car VCD, car DVD, car amplifier, equalizer, car cassette player, car display, and other car audio and video. The mainframe is the most important part of the car's audio, just like the human brain, what kind of sound to make, is controlled by the brain. Currently popular hosts include CD host, MP3 plus CD disc box and CD/DVD host. The most commonly used car CD audio system. The speaker is commonly called a horn, and it is like a human voice. Whether the sound made is sweet or not depends on how the voice is pronounced. The car speaker is the most common in tapered design. Because the mounting position is limited in the car, the tapered design can enlarge the effective area of the diaphragm as much as possible, and the effective area of the diaphragm determines the low frequency response of the speaker. . So friends who like to listen to the bass are all oversized speakers. The power amplifier is referred to as a power amplifier. Its function is to select and process the audio input signal to perform power amplification, so that the electrical signal has the ability to push the speaker. I don't have this thing in my car. Most of the economical cars are integrated with tens of watts of power for the CD host, so I feel that the sound of the original car audio is "not motivated."

The production and sales of car audio are mainly divided into two major systems: First, the customized (ie OEM) products for automobile production plants, commonly known as “original audio”. These products are required by major automobile manufacturing products according to the characteristics of different models. The audio manufacturer is tailor-made for it. It is characterized by the integration of the exterior and the car interior, and the installation is stable, but its functions are mostly simple, and most of the audio equipment used is in the mid-range category, which is mainly limited by the cost of automobile manufacturing. The other category is the major brands of car audio products supplied by the market for post-modification. It is characterized by strong personalization and a wide range of products. It can adapt to the needs of different levels of consumption, but it is also reserved for cars. The effect of size. Therefore, many car owners like to replace the sound of the original car, there are several reasons: enjoy more sound sources (most mid-range cars are only equipped with cassettes and radio hosts), get better sound quality, expand The function of the sound, etc. However, the sound of post-modification and retrofitting of cars often brings about the problem that is neglected by people, but it is very important. It is the car audio installation technology, because the connection from the interface line to the fixation of the audio equipment will not only affect the performance of the car audio. And the service life, etc., but also affect the other lines, appearance and function of the car itself.