Professional lighting and sound engineering is not the same as home decoration, and some places can be made with inferior cables, and most of them are not successful. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 infoThe power of those lighting and sound equipment is not small, and the line environment is very complex, and the consequence of using inferior cables is to find trouble for yourself. And those audio cables and speaker cables are even worse, and cables with incorrect quality parameters often cause some unwarranted small faults, such as noise, current noise, etc., and they cannot be used at all in slightly higher grade occasions.

As for how to identify cables, audio cables, and speaker lines, this is Hong Tao's professional skills, and he naturally knows. The cable is relatively easy, as long as you fold it back and forth a few times to see the hardness of the copper core, and then file the copper core with a file to see the color of the copper core powder, you will probably know the purity of the copper core used in this cable. As long as the purity is enough and the cross-sectional area is enough, it will basically not be a too inferior cable, even if its foreskin appearance is not good-looking, and the font printing is irregular. In some places, the equipment of small factories is relatively old, and the cable cannot be made bright and beautiful inside and out, but the most important thing about the cable is the copper core resistance and cross-sectional area, as long as these two parameters are enough, it is a usable cable.

If there is a higher demand, then use a lighter to light the outer skin and see if it can extinguish itself. If you can, the insulation and combustion performance are basically qualified, if not, then you have to consider the use of the occasion. It can be used in places where the power is not too large, the heat is not high, and the heat dissipation is good, otherwise it is best not to use it.

The audio cable is a little more troublesome, it is a soft rubber protective layer on the outside, and the inside of the protective layer is a copper wire grid made by machine, which is a shielding layer, which is specially used to shield electromagnetic interference. Further inside is a layer of foamed plastic wrapped in tin foil, with a thin copper core in the middle. This is the main channel for signal transmission, and the rest is for it.

The outer layer of soft rubber cover mainly acts as a solid and protective effect against crushing, pulling, and trampling on the inside of the cable, most notably when used on microphone cables. The guests of the night show are inevitably emotional when singing, and it is very common to step on it, mix it, and pull it. At this time, if the outer protective layer is not tough enough and the stretch is insufficient, it will quickly age and break, so that the life of the cable is basically over.

To judge whether the quality of an audio cable is passable, you must first cut off a section of this outer skin bag, and then rub and pull it back and forth with your hands to determine its performance by feel. This method can only be used by people who have used high-end audio cables, because they have touched various grades of cables, and they know what level it is as soon as they get started. The second step is to expose the wire mesh of the copper wire under the protective layer, first see whether these grids are evenly braided, and then try the purity of the fine copper wire, the more uniform and pure the better. The last step is simple, check the quality of the copper core in the middle by inspecting the cable, and the quality of the entire audio cable is almost known.

The test method of the speaker line is the simplest and the most difficult, logically speaking, the speaker line requires a copper core made of single crystal copper as the signal transmission carrier, mainly to reduce the resistance, so that the signal in the transmission process as little loss as possible. But in the actual use process,The cost of the speaker line of monocrystalline copper is sky-high,That thing sells for more than 100 meters per meter,The distance from the control room to the speaker is often dozens or even hundreds of meters,If this kind of wire is used,Zhang Yuanyuan will cry in distress。

There is also a way to shorten the distance of the speaker line as much as possible, that is, to put the amplifier and the speaker together, generally in large performances, the speaker array includes the amplifier group, this is the reason. However, this method cannot be used in the night game, because it is impossible to send someone to keep an eye on these amplifiers in the night game, in case the guests who pass by drink too much and reach out to move the knob on it, or sprinkle the wine, it will be lively.

Therefore, people who do professional audio engineering have taken a compromise approach, not using expensive monocrystalline copper speaker wires, but instead using multi-strand copper core braided core wires with the best possible quality. At this time, it is required that the material of the copper core must be pure enough and the diameter must be uniform, otherwise it will affect the normal operation of the speaker, especially the timbre in the treble area will have a large gap, simply put, it sounds particularly opaque.

"The cable and audio cable are fine, the quality is good, but the speaker cable is not enough. The cables of 2.5, 4 squares, and 6 squares are the same as four plates, and they should be red and blue, and the two-color lines of 2.5 will also come to two plates. I'll take a disc back to compare the audio cable, don't you think?" The results of the inspection are both happy and worried, among these cables of Qiu Daxia, the cable quality is the best, and it is estimated that there is no big difference from the national standard, but the appearance is relatively rough, but it does not affect the use. The quality of the audio cable is also good, whether it is a copper mesh or a copper core, the materials are sufficient, and the quality of the protective layer is also very good, but the weaving of the copper wire mesh is a bit messy.

At first glance, the machinery and equipment of their factory are a bit outdated, and the raw materials are all good things, but they just can't make products with high quality and appearance. However, like those cables, there is no problem at all in use, and the quality is even better than the cables that Wang Jianxin gave, and the price is not high. The most disappointing thing for Hong Tao is the speaker wires,They don't deserve to be called speaker wires at all.,It's purely the copper core in the cable wrapped around the outer skin of the speaker wire.。 As for why their factory wants to do this, Hong Tao is not good to investigate, anyway, these speaker wires can't be asked for nothing, neither can they be speaker wires nor cables, the only use is to sell scrap copper! or tied to the balcony as a clothes rope, quite strong.

"Boss Hong is an expert!I'm going to stock up on the goods!" Qiu Daxia seemed to be very easy to be satisfied, seeing that Hong Tao could get the goods from himself for the first time, he was really overjoyed, and the cigarette butts were burned to the fingers and he didn't realize it, and he got up to get the goods behind the partition.

"Don't worry, I still have something to ask you, wait a minute for stocking. Hong Tao is not in a hurry to use these cables, but he sees that the quality is really good, and wants to buy a few plates to go back for comparison, if it is really better than the cables purchased by Wang Jianxin, the cable consumption in Sanyuan Entertainment City will come from Qiu Daxia in the future. As the equipment supervisor, the master can still do this, and Wang Jianxin will not have any opinions. He did the equipment installation project, and the subsequent scattered purchase and maintenance work were not profitable, and he was eager to get rid of it.

"You say, you say!" Qiu Daxia heard that Hong Tao still had a problem, and he was half happy and immediately went down. In his opinion, should Hong Tao bargain next? This is a bit difficult for him, in order to maintain every guest who comes, the price he gives is almost bottoming out, and if he goes any further, he will lose money.

"It's not about the price, I want to ask you if there are any special light bulbs from OSRAM here, and I have the manual here for the specific models and specifications, so you can help me take a look." As soon as Hong Tao saw Qiu Daxia's face, he knew what he was worried about, and hurriedly spoke out to help him solve his worries. After Qiu Daxia's face returned to blood, he took out the manual of the computer light from his bag, turned to the page of the light bulb, and handed it over.

"Alain, come out............#%\\&#*!" Qiu Daxia picked up the manual and only glanced at it, then turned his head and shouted behind the partition, the first half of the sentence Hong Tao could still understand, this was calling his wife's name, but after that, he couldn't understand anything. The couple took the instructions and talked for five minutes, and they couldn't understand a word, just like they suddenly went to Russia and listened to two Russians chatting.

"People in my house say that there are such light bulbs, which are generally used in outdoor spotlights, that is, the kind of lights that can shoot a beam of light to shine far and wide. It's just that there aren't too many types of light bulbs that came up this time, so she went to look through them to see if they brought them. A few minutes later, Qiu Daxia and his wife ended the alien language, one returned to the sofa to report the result of the discussion with Hong Tao, and the other returned to the back of the partition to rummage through the cabinet.

"It's best to bring it, if there is a sample, I'll bring one back to try, as long as it can be used normally, the brightness and life are not too low, too short, the price is reasonable, I can buy more." Hong Tao listened to Qiu Daxia's words, and couldn't help but feel happy in his heart, feeling as if he had found a way to make money.