A line technology standards Line requirement is noise immunity and safety. All wires must have a resistance to burn, signal lines must have shielding, the amplifier’s power wire should be thick enough. Power line passes through the metal have double protection, all power cords must have wave tube sets. Power and its components should be designed to separate the car audio portion of insurance, in order to ensure safe use of electricity sound. Speaker wire should be returned to its port line and away from the main power line, in the case of last resort, it should cross the vertical alignment, especially in connection control line signal line, the host and the CD case. Host and connect to the power amplifier strict to prevent mutual interference of noise. Another point is that the general audio shop easily overlooked problem: each line connection point should be firmly connected, preferably by welding, this connection can be power loss and minimize signal attenuation. Power lines and equipment should be connected with the appropriate header line the nose, usually before soldering or wire connections nose rinse tin processing. Second, the assembly process standards decoration This standard is generally required to maintain all original original car. Part of the increase in outdoor decoration, its style is as consistent as possible treble Aberdeen .A column and door trim foreskin with the original car paint, etc., should be coordinated with the interior color and styling. Third, the speaker installation standards The general requirement is securely mounted speakers, anti-vibration anti-resonance, it is best to install seals when installing speakers cushioning. Dashboard speakers most likely to produce a small resonance. Subwoofer box should choose good quality teaching about 18MM pull density, but also in the box is equipped with the right amount of sound-absorbing material, of course, this will definitely increase the speaker installation requires a certain degree of artificial time-consuming and material costs, to be charged when the store installation time-consuming, faithful car should be understood that if the fee is not installed, you should carefully check the quality touches. Fourth, listen to the sound of the standard Audio installation is a problem, it is possible to check by audition. 1. After the car starts, rang the car speakers, listen to the speaker whether there is interference .2 throttle, engine and generator to hear if there is noise interference. 3. Turn the volume to “0” to hear whether the current sound treble Aberdeen. 4. open to two-thirds of the volume and listen to loud depressed speaker is firmly installed, whether the resonance phenomenon. 5. Put a professional audition disc, install phase to determine whether there is an error, or phase cytometry. Fifth, the unity, the only test “instrument” is his ears, and after installing audition.