Car audio modification taboos and precautions
The cost of general audio conversion is about 1000~7000 yuan. So when it comes to tuning car audio, there are many car groups admitting that they are not quasi-professional audio enthusiasts, so I just want to draw a little money to improve the music environment and music feeling on it. Therefore, when choosing a car modification shop, it is often “what is cheap to choose†and forgets the principle of “one point of price and one part of goodsâ€, resulting in the end being unsatisfied with the modification effect. Car audio conversion taboos and precautions for the selected car modification shop professional error estimation Audio modification first need to pay attention to the circuit problem, in the car audio modification and maintenance must go to a professional car modification shop, because not A professional conversion shop is likely to damage the original car circuit during the conversion process. This not only does not improve the acoustics, it may also affect the vehicle warranty and a series of after-sales services. Therefore, when wiring, be sure to do a separate cloth power line, audio line, signal line, and the line between the shielding and protection, to be foolproof. But for car owners, it is difficult to correctly determine whether a car modification shop is professional. The best way to look ahead is to review and evaluate car modification shops around the country, so that you can save yourself unnecessary trouble.
Ignore the upgrade space for car modifications It is understood that many car owners often ignore the future upgrade space when they modify the car audio. Modified audio generally has a gradual process, the general order is to change the speaker first, and then upgrade the efficiency, and then increase the bass speaker, and finally replace the host. However, it is advisable for car owners to reserve some space for upgrade. In the future, if you want to upgrade a powerful host, you can achieve hifi sound quality. If you do not estimate the upgrade space in the future, you will encounter an upgrade bottleneck when there is an upgrade requirement.
When people judge a professional sound good and bad sound system, both the frequency response as the evaluation of the smoothness of the main target curve.
Furniture edge sealing glue can be divided into three categories according to the different base materials:
EVA (ethylene-vinyl acetate copolymer resin) base material hot melt adhesive, this hot melt adhesive can be divided into two types with filler and without filler. Using EVA as the base material is the most common production technology for furniture edge sealing adhesives, and its main limitation is poor heat resistance. The ambient temperature of panel furniture sealed with EVA hot melt adhesive shall not be higher than 120°C;
POL YAMIDE (polyamide) based hot melt adhesive, this hot melt adhesive has good heat resistance and fast curing characteristics, the main disadvantage is that it is expensive.
HMPU (polyurethane) base material hot melt adhesive, it is a kind of hot melt adhesive with the best performance, and it is the guarantee of high quality sheet edge sealing. It is expensive and requires special usage.
The performance of furniture edge sealant
1. Viscosity of furniture edge sealant
The viscosity of furniture edge sealing glue does not directly reflect the performance of the glue. In general, the higher the viscosity of the furniture edge sealant, the better its initial tack strength, but the worse the coating performance. Low-viscosity hot melt adhesives have a smaller amount of glue and better wetting properties. Some hot melt adhesives with low viscosity and fast curing speed may also have high initial tack strength.
2. Density of furniture edge sealing glue
The density of furniture edge sealant is generally 0.95-1.6g/cm3, and its density depends on the amount of filler.
3. Softening point and use temperature of furniture edge sealing glue
The softening point is an indicator of the heat resistance of the furniture edge sealant. The higher the softening point, the less likely the furniture edge sealant will melt. At the same time, softening point is also an important aspect to measure the temperature resistance of panel furniture.
4. The opening time of the furniture edge banding glue and the feeding speed of the edge banding machine
Furniture edge sealant is widely used in the market because of its solvent-free, water-resistant, and environmental-friendly features.
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