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Don't think that car speakers are ordinary speakers any more!

Loudspeaker plays a decisive role in the whole sound system. It can even affect the style of the whole sound system. A good louder speaker has its own personality. In the refitting of car audio system, it is the most common and basic refitting to change the main unit and loudspeaker. In the car audio system, the speaker is used as a restoring device to restore the sound, and the quality of the sound is directly reflected by the speaker, that is to say, even if the whole audio system is complex, ultimately we only hear the sound of the speaker. The following describes the terminal equipment in car audio speaker.Characteristics of car speakersWhen you walk into the car audio store, you will see the speakers with different styles and exquisite features in addition to a variety of hosts and power amplifiers. You may think that they are the same as the general household audio, but in fact they are not. What's the difference?temperatureHousehold loudspeakers are used in the room, so the temperature difference is small, while the car works outdoors, with the climate changing, the temperature difference is large, so it is necessary to resist the temperature aging.HumidityWhen the car is raining, running on a waterway or washing the car, it will be attacked by humidity. Therefore, the car speakers need to be moistureproof. Now, they mostly use moistureproof chemical synthetic material sound basin.DustHome appliance speakers are used in the room, so there is less dust, while there is more dust in the car, so dust cover is needed to prevent noise caused by friction of voice coil.VibrationThe vehicle loudspeaker is impacted by the vibration of the vehicle whenever and wherever it moves, so the design should be firm and not loose.NoiseConsidering all kinds of noise and vibration, the materials used are different, and various methods should be used to offset different noise.ImpedanceThe power supply voltage of the car is low. In order to obtain high power, the impedance of the loudspeaker is small. 4 Ω, 3.2 Ω and 2 Ω are used more.By performance and purposeCan be divided into: unit speaker, package speaker, coaxial speaker, subwoofer.A. Unit Speaker:Most of the original loudspeakers in the car are unit loudspeakers, which are simple in structure and can only show the range of mid-range. They show that the high tone is not bright and the low tone is not thick, so they are low-end products.B. Package Speaker:The set of loudspeakers is composed of tweeter, midrange loudspeakers, frequency divider, etc. There are two kinds of commonly used, one is dichotomy and the other is trisection, which is advantageous to the location of sound field. Because different loudspeakers are responsible for different frequencies, the frequency division is accurate and the frequency range is wide. Here we will introduce the frequency divider. The frequency divider connects the sound source, treble and bass to make it a system. Its function is to allocate the correct frequency to the corresponding loudspeakers, so as to ensure that the high and middle loudspeakers can perform their respective duties. There are 0, - 3dB, - 6dB marks on some frequency dividers. It is actually the attenuating circuit of a tweeter speaker. You can choose which tweeter to connect to according to your listening preferences.Due to the excellent sound field positioning ability of the set loudspeaker, it is generally used in the front sound field. During installation, the distance between tweeter and midrange loudspeaker should not exceed 30cm. So as not to scatter the sound too much. The installation position of tweeter is particularly important. Because it will determine the position of the whole sound field.C. Coaxial speaker:It is to place the high and medium pitch loudspeakers on the coaxial or the same chassis. The advantage of coaxial speakers is that they are easy to install and have the same sound source, i.e. point source. The disadvantage is that the treble often "covers" the midrange; the sound is hard and the sound field is uneven, so it is generally recommended to be used as the rear sound field speaker. In practice, the performance of 150 mm × 230 mm coaxial loudspeaker is good.D. Bass speaker:Generally, they are more than 200 mm, and are installed in a specially made bass box. The smaller the size of the woofer, the harder and more crisp the sound effect; the larger the size, the deeper the sound effect, and the heavier the ...

2020-05-28

Three key points of identifying and selecting the speaker box

As we all know, in a complete set of professional sound package, speaker box, as the terminal equipment of audio, is like a voice. The quality of the sound box determines the quality of a set of sound to a great extent. This article mainly from five aspects to analyze how to identify and select louder speaker boxes, specifically follow the editor together to understand.Introduction of speaker boxSpeaker box refers to a kind of equipment that can transform audio signal into sound. Generally speaking, it means that the speaker main box or subwoofer box is equipped with its own power amplifier. After the audio signal is amplified and processed, the sound is played back by the speaker itself to make its sound bigger.The sound box is the terminal of the whole sound system. Its function is to convert the audio electric energy into the corresponding sound energy and radiate it to the space. It is an extremely important part of the sound system, which takes on the task of transforming electrical signals into sound signals for people's ears to listen directly.Three key points of sound box identification and selectionPreliminary understanding of sound box before auditionFor the initial understanding of a pair of speakers, the steps of "viewing, weighing, knocking and recognizing" can be used to identify: one viewing process, two weighing, three knocking box and four identifying nameplate. The appearance process is to judge the quality and quality of the speaker from the first image of the speaker: naturally, the speaker made of natural log is the best, and many world-class famous brands, including Italy's Chario and Guarneri, are extremely expensive Homage and so on, but due to environmental protection, lack of resources, difficult processing technology, long time and other factors, such good boxes will not be popularized as the ubiquitous "Rejoice" shampoo, and the price is certainly not low.In particular, the symmetrical butterfly pattern real wood skin after multi-layer painting and polishing piano lacquer, most of them can be regarded as high-end quality speakers, with few imitations. The case with PVC plastic skin is a kind of goods on the road. Although it has fine workmanship, it is better to count only the middle and low-grade goods. While the box decorated with this paper should pay more attention to the sticking seam behind the box and whether the digging and binding process of the horn installation position is accurate. Fake and shoddy products generally do not pay attention to these details, so a little attention can accurately determine. In fact, the real log box is almost invisible even on the Hi-Fi box. Because the wood that can satisfy the requirements of making speakers is very rare, for example, the wood used by Chario in many top products is the top Italian red oak that has grown for more than 40 years. According to Italian environmental protection laws, for each tree species cut down, the buyer must plant another 10 similar saplings in addition to the wood price.Judging the loudspeaker box by technical indexThere is usually a technical label on the back of the finished speaker: the content is just the frequency range, agility, carrying power and impedance of the speaker. The agility rate is the most important index of the speaker, which determines to a large extent what kind of amplifier should be selected for the speaker, how much power is needed to push and so on. The agility of most hearing level home speakers is between 86-92db. For a unified stage power amplifier, the higher the agility means that the louder the sound is, the lower the power demand and requirement of the speaker for the power amplifier will be.A good speaker box can let you hear the correct audio-visual positioningThe so-called image positioning refers to the position of each instrument in the playing. Like a big symphony orchestra.A good sound box can accurately reproduce the sound field positioning with distinct layers. Even if you are not a hot friend, you can also hear the sound of various instruments from the virtual stage in front of you at the direction of experts. It is not just the mixed melody of various sounds from the sound sources of two speakers. A better speaker box can be auditioned in a professional audition room with strict acoustic treatment and moderate size. You can even feel the special sense of space and scene at the music ...

2020-05-20

The material of the speaker cone determines the sound quality of the loudspeaker

We know that in the loudspeaker, when the voice coil is connected to the audio signal, it will produce strong vibration in the magnetic field. The voice coil is fixed on the loudspeaker cone. The vibration of the voice coil will drive the vibration of the speaker cone at the same time. The vibration of the speaker cone forces the air to vibrate, so as to produce sound. Therefore, the speaker cone is an important part of the speaker, and the sound quality is different with different speaker cone materials. Classification and characteristics of loudspeaker coneAt present, the speaker cone on the market can be roughly divided into the following categories:1. Paper cone: the paper cone is easy to integrate with other materials, so there are several kinds of paper cones, such as coated paper cone and tight pressed paper cone. Although the cost of paper cone is low, its timbre performance is good and its sensitivity is high. So the paper cone is the most widely used.2. PP cone: PP cone has low distortion, is good at performing all kinds of music, and has high cost.3. Wool cone: using wool as loudspeaker cone, with good flexibility, good at performance of light music.4. Bulletproof cloth cone: the speaker of bulletproof cloth cone has a wide range of frequency response, which is suitable for music lovers who like strong bass. But its cost is high and it is difficult to make.5. Ceramic cone: good at performance of voice, classical music, fine timbre, good dynamic performance.Metal cone: add aluminum, magnesium and other metal elements, strong rigidity. The loudspeaker has strong instant explosive power and is suitable for dynamic and powerful music.Material analysis of speaker cone1. Paper materialsPaper material is the traditional material for making speaker cone, which is often mistaken as outdated technology and is not suitable for the use of high-performance speakers. The paper speaker cone is easy to be processed into various shapes without complicated and expensive molds, and its mechanical properties can be adjusted in a wide effective range. However, untreated paper cones are very sensitive to the environment, especially humidity. When the environmental humidity changes, the paper moisture will change, resulting in the changes of carcass quality and Young's modulus and other parameters.In addition, although it is possible to process a loudspeaker cone with enough rigidity to obtain an extended frequency response range, the internal loss of the paper itself is not enough to obtain a smooth roll off. In addition, the deviation of paper production is large, which is not conducive to the consistency of batch products. The application of various surface treatment methods can overcome the above two shortcomings, such as latex or PVA based coating, impregnation. These coatings help to isolate the speaker cone from the surrounding environment and increase the transmission loss, so they can smooth the high frequency response.2. Polypropylene materials (also known as PP, CD, etc.)The BBC developed the material in 1976. Because of its strong internal damping, it can obtain a flat response and high efficiency in the working area without any equilibrium. Polypropylene is probably the most common material for loudspeaker cone application. Many speaker cones, which are claimed to be made of polypropylene, are actually doped with organic compounds and other fillers (such as carbon fiber and Kevlar). Fillers can control costs and change the mechanical properties of materials. Polypropylene speaker cone has good inherent damping, so as long as the frequency band requirement is not very wide, it is no problem to achieve smooth response. In addition, it is not sensitive to environmental humidity. It is easy to achieve strict tolerance control of the material itself and its processing technology. In fact, because of its stable and reliable properties, polypropylene materials are the first choice for many researchers to carry out FEA analysis of loudspeakers. Polypropylene materials are not easy to bond, so they should not be approved in the early days. Modern advanced adhesion technology (early 1980s) has completely solved this problem.3. High strength woven fiber with resinMost carbon fiber, glass fiber and Kevlar basins belong to this class. The speaker cone is made of fiber woven cloth and epoxy or similar resin. The fiber itself has a very high tensile strength, and the hardness of the material will be considerable if a proper amount of resin is implanted. There is no doubt that the frequency band of the braided basin has expanded. However, the smoothness of the frequency response will be affected because of the low internal loss. It is believed that the irregular orientation of the fiber is beneficial to the suppression of the standing wave in the basin and the smooth frequency response. According to experience, this method has little effect on the high frequency response, and the high frequency response of the test speaker is not smooth. Even the best Kevlar and carbon fiber have a high Q peak at least in the upper part of the working area, generally at the most sensitive 3-5KHZ of human ear. The same is true for other rigid elements such as metal basins, which will lead to fatigue of listening for a long time and compression (concealment effect) of sound field perspective.4. Metal materialsMetal material is a new kind of cone material. Among the materials discussed so far, the damping of metal is the smallest, so the peak value of high frequency area is very large. It is common for 6.5-inch loudspeaker to reach 12dB peak value at 5KHz. However, under the first segmented vibration, the performance of metal voice basin is very good, which is the main point of its popularity. The most common metal voice coils are aluminum (and its alloys) and magnesium. If it is possible to use a variety of forming and surface treatment technologies to process metal materials, the emergence of high-performance metal speaker is not unimaginable. However, even if the best divider design is adopted, the current high frequency band of metal voice basin is not ideal, so it is not suitable for full band system application.As a top quality parts of speaker manufacturer, our company provides many kinds of speaker cone, such as paper cones, injection cone, PP cone and so on. Welcome to ...

2020-05-20

Home theater cannot be used for singing. What is the difference between it and K song audio

Home theater cannot be used for singing. What is the difference between it and K song audio? Music can evoke our feelings and appreciation of beauty, and it can bring us peace and comfort. Although ...

2020-04-09

What are the tips for leasing stage professional audio equipment

Since most of the stages are built temporarily, the audio equipment used is not purchased for long-term use, so there is no continuity of use. Therefore, we need to have a professional vision for ...

2020-02-05

What does a complete set of audio equipment include

A complete set of audio equipment includes microphones, mixers, feedback suppressors, effects, equalizers, limiters, exciters, crossovers, disc players, mixers, amplifiers, main speakers, ...

2020-02-05

What layer of cloth is used for the speakers

The layer of cloth outside the speaker is called: speaker cloth, speaker cloth, speaker net.The materials of horn cloth are: silk cotton, nylon wire, plastic, metal wire, metal mesh, metal orifice ...

2020-02-05

What kind of speakers do families use

There are two types of home audio: hifi and AV. If you like to listen to pure music such as symphony, singing, piano, etc., select the hifi box. The hifi box is 2-channel without a subwoofer, because ...

2020-02-05

What accessories are needed in the speaker?

Accessories are components;The accessories in the sound system are the large pieces of the whole machine, such as the sound source, effect processor, amplifier, and speaker.The big accessories are ...

2020-02-05