国产AV女人久久久精品,黄片视频免费观看带字,一级特黄色录像视频,久久久无码一区二区三区免费

1. Safety

During the disassembly and assembly process, the original vehicle wiring should not be damaged or short circuited. The wiring of equipment and equipment should not be connected incorrectly, as incorrect connections can lead to adverse consequences. The equipment should have reliable methods, otherwise a fire may occur. The audio circuit should not interfere with the computer and electronic devices in the car, otherwise there may be defects. Professional trained personnel and equipment are required to ensure safety.

2. Skills for disassembly and assembly

In the process of modifying the audio system, the first thing to do is to remove the original car audio system. Whether the disassembly is proficient or not is the fundamental question of the modification. Since the screws cannot be seen on the surface of the exterior panel now, it is necessary to pry open the decorative components in order to see the screws. The disassembly process requires professionalism and rigor, otherwise it is simply dismantled. The second step is to install wiring and replace speakers, which requires disassembling and assembling door panels, door edges, exterior countertops, seats, decorative panels, etc. Special tools must be available during the disassembly process, and the original parts must be intact, otherwise it may cause problems such as unsightness and noise.

3. Is the product qualified

There are many counterfeit branded equipment in the shopping mall now, and it is necessary to distinguish them when purchasing, otherwise there will be future problems. Some low-priced equipment may not have obvious quality issues from the appearance, but the underlying equipment is made of inferior quality, and the circuit planning does not meet the standards. This type of equipment has poor sound quality, is prone to defects, and even spontaneous combustion. It is necessary to purchase from authorized shops by the manufacturer in order to use it with confidence.

4. What is the sound quality effect

Buying branded products does not necessarily mean they will sound good, and the variety of branded factories is also divided into high, medium, and low levels. Buying high-level products does not necessarily sound good, but fundamentally requires professional personnel to systematically match and debug equipment in order to achieve good results. It's not just a matter of casually connecting a few lines, the sound field positioning and phase should not be at fault, otherwise the effect cannot be imagined.

5. What is the after-sales service like

Car audio is used in sports, and the environment is harsh. For example, temperature, humidity, oscillation, dust, etc. can cause various problems with the audio system. Maintenance, warranty, and repair are important questions. Cheap purchase of counterfeit goods, refurbished machines, clearance products, stolen machines, etc. The warranty card is fake and there is no after-sales service. Once damaged, repair fees may be invalidated, which is not worth it. Nowadays, the equipment sold in specialty stores does not need to be expensive. There are many cost-effective equipment that can enjoy excellent after-sales service. Why not.

Article source: Intelligent Bluetooth shoe light http://www.iftuetwn.com/