Basic composition of a car audio system
1, Antenna
The antenna is used for Receive radio waves from radio stations and transmit them to radio frequency modulation devices through high-frequency cables.
2, receiving device
The receiving device is a radio tuning device that selectively receives the high-frequency electromagnetic waves emitted by the radio station , and demodulated into an audio electrical signal.
3, Tape Player
The Tape Player is used to play music signals recorded on tape.
4, CD player
The CD player is used to play music signals recorded on a disc.
5, Equalizer (Balanced Fader)
Equalizer is used to adjust the characteristics of a sound (music) signal, To adapt to the car listening environment.
6, Power Amplifier (Speaker Amplifier)
A power amplifier is used to amplify a weak audio signal to the point where it can drive the speaker sufficient power.
7, Speakers
Speakers are the final key component in determining the acoustic performance of the cabin.
The size of the speaker diameter and the method and location of the installation in the car are important factors in determining the sound performance. In order to enjoy the stereo sound, at least two speakers should be installed in the car.
Characteristics of car speakers
Walking into a car audio store, in addition to a dazzling array of head units and power amplifiers, you will also see those different styles, Exquisite and chic speakers (speakers), you may think that they are the same as ordinary home audio, but they are not. Where is the difference?
1, temperature
Home speakers are used in the room, so the temperature difference is small, while the car Working outdoors, as the climate changes, the temperature difference is large, so it is necessary to resist temperature aging.
2, Humidity
Cars will be hit by moisture when it rains, walks on wet roads, and washes the car. Therefore, car speakers need to be moisture-proof, and now more moisture-proof chemical synthetic material cones are used.
3, dust
The home appliance speaker is used in the room, so there is less dust, and there is a lot of dust in the car, which needs to be protected. The dust cover prevents the friction of the voice coil from producing noise.
4, Vibration
The car speakers are subject to vibration and shock when the car is moving anytime, anywhere, so the design must be firm and not loose.
5, Noise
Considering various noise and vibration conditions, the materials used vary Various ways to cancel different noises.
6, Impedance
The power supply voltage of the car is low, in order to obtain high power, the impedance of the speaker is small, more Use 4Ω, 3.2Ω, and 2Ω.
