Electronic products are inevitable one to human life. It directly interfaces with the human life daily. Most of electronic items are available in a cheaper rate compare other system of products. Head unit is also a type of electronic component, which is nothing but the stereo system. It should be installed in car, heavy vehicle or in home theatre. It is a kind of media system is used to enhance the quality of the sound. Each head unit has a receiver end and transmitter end. Receiver end is used for getting signal for the radio from the environment. The efficiency of receiver is very vital for the radio sound quality. If receiver efficiency is very less then signal captured by the signal should be very weak. To strengthen the signal we need to go for various operations like filtering, amplification and isolation etc.
Main head unit accessories:
If receiving signal is too weak then the signal must be boosted with the help of amplification. An amplifier is used to done the amplification operation. Filters are used to reduce the unwanted sound or noise. Some of the main head unit accessories are very essential for the normal human life.
1. AM/FM radio: it is very common and known to all, but the quality of the sound emerged from the system should be different from radio to radio. The amplitude modulation is different from the frequency modulation radio. Usually most of the people usuing a frequency moduclation technique. the frequency is lies in the range between 87.5 to 108MHz.
2. remote control: remote control is used to control the full audio system employed in the car. due to modern technologies various sophisticated remote controllers are arrived in the market for decent prices. Even a display remote with touch screen is also available. So people can easily interface with the audio system while driving.
3. CDs: providing a compact disc unit in the head unit is older technique, DVDs replace the compact disc concept. More space and higher quality easily replaces the CDs in the market.
4. Cassette tapes: This is one of the very old audio technique. This technique is completely not in use.
5. GPS: The global posiotioning system is used to find out the signal position with the help of time differnce technique. The time differnce between the signal received and signal transmitted should be find out first and then using that data the position of the transmitting signal is easily found with the help of gps technology.
6. Bluetooth: the most important and modern technolgy in the electronic field is bluetooth technolgy. It is used for transmitting the data form one system to another system in particulat distance. The distance between the system should be optimum otherwise bluetooth technogy is useless. The optimum diustance for the bluetooth technolgy is 8 to 20 meters.
These are considered as the top head unit accessories which is used in the normal car. the precise control of music should rely up on these accessories. Satisfied level of quality sound should be reached with the help of these accessories. Other important parameters responsibel for the quality sound is bandwidth, audio frequency, balance of the speaker etc.
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