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car audio system routine maintenance
Maintenance of the host:
Most vehicles today are equipped with CD player. Heat and humidity will directly harm the life of the laser head, so when the sun is
raging, in order to avoid direct sunlight, to resist what is best to use the sun visor.
As the summer the air is humid, it is likely to cause fogging on the CD, the CD drive if wet directly into the host will not keep pace
with the laser read head, and damp electrical components, laser head can also cause serious damage. Humidity and high temperature
electronic components and the laser head is the main culprit of aging.
After exposure to sunlight in the car should not be immediately after the volume of the sound, because the electronic system of
working conditions will change with temperature, and immediately turn up the volume will not only damage the speakers and other
electrical appliances, but also affect the host s life.
Another enemy is the laser head dust. Although the car stereo during the design process has considered the problem of dust, but
because of the domestic road conditions vary widely, dust issues remain important. In poor road conditions, the owner shall promptly
closed the window, usually also pay attention to cleaning the car.
Car CD disc slot-machine multi-use design. Just put the CD at the entrance, mechanical suction disc automatically. Some owners do
not understand this structure, often by hand into the disc, so that will not only damage the disc, but also serious damage to the
structure inside the tray.
speaker Maintenance:
If the doors and windows sealed lax should be replaced immediately, otherwise the summer will lead to leaking door speaker damage,
serious but also burned the host circuit.
Horn basin will occur at high temperatures subtle changes that will directly affect the sound quality, so after the beginning of summer
sound and feel different from the past as to the professional audio shop can do the appropriate debugging.
Maintenance of Disc:
Not on the dashboard disc. Hot summer, the sun s disc are prone to deformation under exposure. For the audio portion of the tape,
the same should be noted that to avoid the hot moisture. High temperature deformation will tape, cassette into the host when the
phenomenon. If the tape directory sign above reveal, it is better simply to tear up, otherwise it will result in failure of the tape could
not retreat. Do not listen to in a long time or is turned off, it is best to tape out, because the shutdown will temporarily suppress the
tape pulley pressure, a long time will lead to pressure pulley deformation. Not long after the disc will be in the dust and scratches in
the surface dust wipe the disc with audio tracks along the perpendicular to the direction of the wipe. Be sure to use the host
selection of good quality genuine disc. Because there is often a pirated disc surface is uneven or round plate hole is not the case, the
playback of these risks can lead to the laser head to skip the points failure, directly undermine the life of the laser head.
Classification and role of the speaker magnet
Magnet is to provide energy product the size of the foundation. Now the popular car audio market with the ferrite magnets and
magnet generally NdFeB magnet:
Ferrite magnet: is the most common magnet, which is formed by the sintering of iron oxide; As a result of the purity of the different
magnetic field strength of different sizes, due to the strength of a magnetic Y20 to Y35 of the hierarchy, the general The table is
based on the magnetic strength of magnet to distinguish, Y20 level of the lowest, Y35 highest. The disadvantage is that a larger
body, fragile, and low coercivity is relatively easy to demagnetization.
NdFeB magnet: iron is added in the rare element neodymium, boron and other elements made of cast high coercivity of the magnet,
because of its high coercivity, resulting in easy magnetization or demagnetization, requires special charge magnetic machine to
magnetization. It has small size, the characteristics of high magnetic field strength, but influenced by temperature because of its
relatively large, in general, to over 75 ℃, the magnetic field strength with increasing temperature, decreased significantly. Now the
market has started to heat NdFeB magnets is high temperature and magnetic field strength for the decline in R & D out of the
product.
car audio amplifier of the three characteristics
High-power amplifier is characterized just by the text description is better able to understand the power amplifier is not good or bad.
Quality of the amplifier must also be able to quickly reflect the music signal peak, while that corresponding to the powerful bass and
low distortion / low noise conditions to provide a smooth output. To meet these requirements, you must have the following:
First, the power is excellent
This is so key to sound amplifier. The power supply should be separated from the Department of the Ministry of amplification designed
to reduce noise. Use of the large step-up transformer to improve stability of the current supply, and large capacitors, can more quickly
respond to supply the necessary current amplification.
Second, is the built-in equalizer parameters
car audio and home audio are very different, the speaker of the installation location is very limited, the importance of sound regulation.
In addition, head and sound effects to hide the windows and the installation angle of the subwoofer sound waves caused by
confusion, car audio system will sound. At this time work is the parameter equalizer, it causes the sound waves on the crest, trough
to compensate, adjust the smoothness of the sound field.
Third, the built-in divider
No matter how good the amplifier function of its own, the actual installation in the car, it will also sound for a variety of issues, the
speaker configuration that can not achieve the best results. To overcome these, in addition to also use the equalizer parameters
divider. Built-in divider has two advantages: First, the system is scalable, can be free of the power amplifier and speaker combination.
Second, the adjustment is simple. This makes the entire system can be improved sound quality. Frequency using external wiring is
more complicated because the system easily mixed with noise, more space is required for installation and make the system prices, so
the choice of vehicle power amplifier for when we do not recommend
comprehensive perspective modified car stereo noise and grounding problems
car audio conversion in the ground is an extremely important issue, theoretical knowledge is very important, otherwise I do not know
how to troubleshoot failures encountered.
With power (signal), which is a pair of inseparable twins. Ground, usually refers to a conductor connected with the earth. Electronic
technology in the land, and the earth may be irrelevant, it is only first-class circuit potential surface. Such as radios, television sets in
the ground, it is only the receiver circuit in a potential reference point. Ground, electronic technology, both simple and complex, but
also essential. According to ground role, the work can be divided into the ground, protective grounding, grounding overvoltage
protection, anti-static grounding, shielding, grounding, signals to other. In radio and television technology, the above would encounter
several types of ground. Now on with the actual ground of some technical issues to make a set.
First, the protective earth
Protective grounding to prevent power supply polarity is reversed resulting in equipment damage and set up protection device, the
simplest way is the power to increase the input of the reverse diode, car stereo equipment is particularly common in the circuit.
Second, the pressure to protect ground
This is a high voltage and set the ground for the protection device. Anti-point spark device is the most widely used and is the bubble
pressure-sensitive diode. Through ground absorption and limiting. Such as damage to many of the first high-frequency high-voltage
caused by fleeing into the Jihuai receiver.
Equipment has a voltage regulator circuit power input terminal, and also with overvoltage protection circuit and overcurrent protection
circuit, and temperature protection circuit.
Three, the shield
To prevent electromagnetic induction and on the TV, the audio cable shield the metal skin, electronic equipment, metal shell, shield,
shield metal building network (such as test sensitivity, selectivity and other indicators of the shielded room) as a protective measure for
ground . In all the earth, the shield to the most complex kind of inexplicable feeling. Because the shield itself can prevent outside
interference, they may interfere with the outside world through it, and between the various components within the device also
beware of electromagnetic interference, such as the well-known case in the week, tube shield is an example. Signal line shield
grounding is very important.
Shielding bad, improper grounding can cause interference, such interference are:
1, AC interference, which is mainly caused by the AC power. Protection of AC interference, usually the power supply filtering or signal
plus shield and ground. Stray electromagnetic fields in large, for the anti-electromagnetic interference shield grounding is necessary.
For example, the generator will produce electromagnetic interference, will be sent to the device through the internal wires, filtering
and shielding ground, to solve this problem.
2, high-frequency interference. This type of interference from radio transmitters in various frequency or ultra frequency signal, which
after fleeing into electronic devices within the machine and the formation of non-normal demodulation audio interference. Such as
spark plug ignition, contact spark relay.
The higher the frequency, skin effect will have a footer, equipment, metal mesh hole should be smaller, the signal wire braided shield
should be more dense, or they will lose the shielding effect. Frequent plugging of the signal line, should prevent the shield in the plug
loose and fall off. Sometimes equipment due to the shielding is shielding the signal lines into the ground (they link up through the plug
and socket), if the mask off, it is very likely to cause interference. If the signal line placement and interference, and sometimes hand
touched the signal line shield is no interference, indicating the formation of high-frequency distribution of signal interference due to
capacitive coupling.
Fourth, the signal ground
A variety of electronic circuits, there is a reference potential point, this point is the signal ground reference potential. Its role is to
ensure that the circuit has a uniform reference potential to warrant the fluctuations caused by the error signal.
Signal ground connection is: the same device with the signal input to the output signal can not be linked, but should be separated;
previous level (equipment) and post the output to only level (device) connected to the input ground.
Otherwise, the feedback signal may be formed through the ground, causing the signal fluctuations. This is a test device, the signal
ground connection particular attention. For example, the signal line noise Ground broken skin. To belong to the original signal back
through the ground so that the results are inconsistent. And some can not be directly grounded amplifier case, all the points that set
the ground is not grounded, this phenomenon, there is no noise.
Fifth, car audio specific ground
Many vehicles install the amplifier, loud bass playing (no more than normal power consumption), instrument lights flashing with the
music, this is because only the amplifier s positive line bold and ignore the negative line, the circuit formed from positive to negative is
to have a loop, then the positive increase crude negative current can not be fine, as uneven water flow pipe thickness can only fine
the flow. So to increase the amount of current negative, specific practices:
1, the engine to the battery negative one (the engine and the body is insulated).
2, the engine to the body a (increase generating capacity). Line thickness of at least the same line with the positive.
women practical personalized car decorations
Women, born with the ability to dress.
When women have a car of their own, they are more or less through some accessories to dress the car. From a psychological
perspective, the car surrounded by a relatively narrow sense of space and provide for them a safe and reliable psychological
super tweeter
suggestion, which is “home” to bring their psychological impact is the same. In this environment, women s desire for comfort will be
hugely magnified. Many dedicated women in the car put their own things, to mark out the car different from other car ownership,
while car interiors are, can help women at home and also create a safe, warm, comfortable feeling. When they are driving in their car,
they become a way of rest and relaxation.
car audio
Personalized jewelry is very beautiful car
When women buy a car, the car s exterior color and interior itself is usually women who can not meet the pursuit of individual, as a
uniform color and detail for each car looks all too similar. The psychological demands of the female is to be in the crowd with some
small details and distinctive. Thus, through many ornaments dress up their car after the car has become the first step in the action.
marine speaker
Beautiful very practical car supplies
From the function in terms of car accessories, car as a mobile “home” is not only to create a comfortable and safe family atmosphere,
which there are many useful features, but also give women the same as at home easy. In fact, the car market was born out of a
variety of new products is to meet the needs of many women s unique features and design and manufacture. The difference is that
the life of ordinary tools branded a “car” word, enter the automotive world as the women continue to serve.
Temperature-controlled car with a vanity case cosmetics can not maintain long-term deterioration due to high temperature inside the
car, to facilitate women s make-up makeup at any time. The car will make frequent use of air conditioning becomes less moisture in
the air, coupled with factors such as sunlight, dry air is the natural enemy of women s skin. The car air humidifier can effectively
regulate moisture content, for women to create a comfortable air humidity, effectively protect the skin against dryness. Car racks
convenient to carry clothes to avoid wrinkles women, which often place women at formal business very helpful, you can always let
them have a decent dress. Car shoe more of a solution to wearing high heels of women s flat shoes to replace the problem drive. Car
design and car seat connected to the shoe box, replaced the shoes do not run around in the car, but also to avoid unnecessary
security problems. Vehicle debris admission package can be placed paper towels, snacks, drinks and a small amount of garbage, space-
saving ease of use. These have a variety of features designed for the female car owners to create a mobile cloakroom and dressing
room, both play a decorative role in the car, but also provide living and working in a small help, very useful.
Music for more Smart cars
If the pursuit of individual car owners, a variety of car stickers, ornaments and other decorations are still significant enough to highlight
your personal style, then slowly flowing in from the car stereo out of the music, must be marked for your car exclusively for your label.
Music is a mood of singing who, in the car personality and mood music is the owner of the voice. Spring, to open the car out of the
hustle and bustle of the city, into the embrace of nature, under the shade of lush crooning to listen to Lisa Ono light singing, voice,
gently dotted with elegant and slightly lazy, just spring sun swim under your inner thoughts. If you encounter cloudy, intermittent
rain, put a melodious lyrical blues, followed by a short depression that gray day, alone in the car, this time is valuable and can be used
to listen to their inner voice dialogue . Use music to decorate your car, the car space atmosphere with mood change, people and cars
from the more narrow. At this point your car is no longer a simple means of transport, but always about the best friend to accompany
you. Music, giving the car more agile vitality.
Fragrance let the car better
In addition to music, the women who can not see the decoration of course, perfume. “Scent of a Woman,” also shows that women s
perfume is an indispensable style markers. Car into a woman s life, perfume also entered the car in the world. The same style as the
women s perfume complex, there is fresh and elegant floral, grass-green flavor to stimulate the cool, dry and calm with classical flavor,
there are noble and mysterious oriental flavor, as well as mature modern scent … charming … like a different fragrance, but also on
behalf of a woman to pursue a different style.
Placed in the car perfume, not only for the interior space to create a more comfortable and pleasant ride environment, but also reflect
the quality of life the pursuit of the owner. If the car is designed for one person, then the owners are free to choose the type of
perfume, Enjoy perfume to express your preferences and preference. If it is a combination of home and business car, then the
selection of fragrance should be elegant or as much as possible selection bias can be accepted by the majority of the flavor, try to
avoid prone to respiratory sensitive flavor.
bass distortion becomes noise is not cheap car audio upgrade
Some owners believe the economy to relatively cheap car audio upgrade, buy cheap audio equipment on it. Experts recently told reporters that it is not. This not only makes no formal merchants loophole for the cheap poor quality of the user configure some random, high-profit goods, but a little longer there will be a series of problems, giving users a lot of trouble.
marine speaker
It was explained that the original car stereo speaker configuration is usually not low, there is no chance to audition before the owners of high-quality bass, it just finished audio conversion, fitted subwoofer, you can feel better sound than before, but listening to a period of time , the owner will feel the bass vague chest tightness hear, the mind fameng. This is because the bass into the distortion of the state noise, this noise will not only damage the brain, and may lead to accidents.
pro audio speakers
In addition, professional audio stores compared with non-configured installation of car audio specialty store, it seems cheap, but the effect is really bad. In addition to equipment with, other than the sound field positioning debugging, installation technology, process, use of the wire are there is a gap, and failure-prone, no after-sales service. Therefore, the owners do not be cheap, only trained technicians for installation and commissioning,
pro audio speakers
in order to give full play to the advantages of audio equipment.
economy cars into hot audio conversion increasing concern
More and more economic cars into people s home, can be said that the development of automobile industry in recent years led to the development of the whole chain of the automotive industry, and car after car audio has become the most frequent replacement of a project. How to choose an economy car for car audio has become a concern.
Now on the market is the absolute number of economy cars, and generally is a private car-based, open-economy cars so the crowd is very concerned about the car, will start from the car on the market a lot of contrast , including appearance, fuel consumption and function. So in the process of car use is the same, in terms of maintenance and modification, etc., want to give your car a more perfect choice to protect and improve methods.
line array speaker
Price and functionality are key
In the choice of sound, we must first choose a brand of car audio. Some might say that, in fact, no difference between the brand not the brand, the key is the price and features. I personally do not agree with this view. What is brand? Brand includes many elements, but also that the brand represents the strength and commitment. Well-known brands have their own R & D, which represents their continued innovation, even under adverse conditions in the market will not blindly follow the trend, but rather play the role of industry leader, play a catalytic role for the industry, This can guarantee that these firms are not ephemeral, at least as a consumer is guaranteed. Consumers buy the brand product, you will naturally enjoy the brand s sale brought other additional services.
car tweeter
As we all know, the current domestic car audio brands, divided into two systems, one is Japanese is now the first choice among everyone in the concept of product; one is the domestic products. The main representative of Japanese brand Sony, Kenwood, Alpine, Pioneer, and the main representative of brand domestics song rhyme, fly rhyme, Huayang, ultra-sound. This applies mainly economic car audio brand for example, of course, a professional audio conversion to relate to more foreign brands (including European and American countries). For now, there is the most low-end brands of car audio products prices are around $ 600.
Very similar to the current car stereo color TV a few years ago the industry. At that time, also the Japanese mainstream, while the domestics in its infancy, more worthy of our attention is that the current low-end car audio, the vast majority of Japanese products that are produced by the domestic OEM, that in fact the car in this grades sound, the sound quality is not much difference. It should be noted that Alpine can be said that an exception, because the concept of Alpine and other brands are not the same sound, that is focused only on quality, so the Alpine s most low-end products require about 1,000 yuan, of course, it would be of different quality , but can be a simple function can not be easy, only basic FM and CD functions.
car subwoofer
From the product point of view, the most basic function is to car audio FM and CD, and then is to add MP3, WMA, shockproof, color screen, with USB interface, audio input interface, and so these features. Overall, each additional feature will be enhanced as part of a cost.
When the self-made brands
Economic choices are brand car audio products is another important reason is that after-sales service. The reason why the price of domestic brands than similar products on the Japanese brands low prices a notch, very important reason is that the service above, the reason why many people do not want to buy domestic products, not because the product causes, but because of the after-sales service no confidence, which is mainly a few years ago a lot of domestic companies in this industry since the drop caused by the brand at that time a lot of brands have mushroomed flooded the market, but few really can stick to long-term, which also led to the purchase of product in the event of a problem and not deal direct damage caused to the user. But as the industry reshuffle, more and more domestic enterprises have to pay attention to this problem, several domestic brands mentioned above be in the current one of the few domestic brands have their own perfect service system, several home. Sound economic car purchase can refer to three steps:
A product according to personal preferences.
Second, while the choice of products to choose well-known brands.
Third, choose the product features.
After all, car audio needs modified in time to change the original car s audio line, so the conversion look even when converted stores is safe and reliable. Sometimes the same model with the brand s products in different price difference a lot of business, the difference in what it? Naturally adapted technology. To give a very simple example, the modified lines need to use heat tape wrapped multi-professional, and the conversion of poor shop may simply wrapped with ordinary adhesive tape, this will easily lead to vehicle running in the heat tape ignited, causing Auto ignition. Here we recommend the best companies to have direct conversion certificate authority store, that would be more at ease.
affect the key components and car audio conversion techniques
Right now New Year s Day, Spring Festival followed, in which a prime travel season, driving your car out to play, is it not a good
sound a lot less fun! To this end, the city s sound technician auto conversion on some of the problems do sound answers for
reference.
Sheet metal is the first interference factor
What kind of car what kind of sound for installation, how to achieve the best results. In general, the car in motion the process
when the board gold and low-frequency audio playback, if the sheet metal and thin, then, will have to issue low-frequency resonance
noise will be increased to cover the low-frequency part of the music, which affects the car stereo three-dimensional effect.
speaker placement is also critical
In addition to differences in body structure, the different origins of the car his car speakers to install the original settings used are
different. If you just purchased and installed an ordinary stereo system, car owners are best placed in the car horn back door back
door. And then if you install AV systems for surround effects you can follow the example of the pursuit of Japanese and American
cars, in the occipital area after the installation of speakers. The front door of the car horn, the midrange speaker should be installed at
the front door, installed in the dashboard or treble the A-pillar when the sound is best.
Effects of noise also affects the engine compartment
In addition to the body thickness, the original vehicle to install a car horn sound on impact, the car engine work state and work
the noise characteristics of the car also has a larger sound interference.
Thus, in the modified car stereo installation, be sure to pay attention to the installation of insulation in the engine compartment
area of ??cotton in order to play a sound, sound-absorbing effect, clean crew to enjoy the car audio environment.
Interference with electronic systems can not be ignored
In addition, with a high degree of automation of modern cars, car body types circuitry clouds, to the owners of these electronic
systems bring great convenience and driving fun at the same time, but also to some extent interfere with the enjoyment of pure car
within the sound. General Japanese car circuit car audio interference will be smaller, because Japanese cars tend to use the vehicle
computer system as the European and American cars more reason, and the U.S. Department of European cars generally use high
frequency board computer, therefore more prone to interference with the sound system electronic noise.
Share premium audio technicians car audio experience modification
Automotive Auto Parts recently in Beijing Dragon City in about the “quality of service automotive after-market competition”, many
consumers make the modification on the car stereo many questions. Right now New Year s Day, Spring Festival followed, in which a
prime travel season, driving your car out to play, is it not a good sound a lot less fun! To this end, the reporter visited the Dragon
Automotive Auto Parts City, senior sound technician Mr. Tian Jiang and Mr. Du Kai, ask them some questions to do audio conversion
solutions for consumers.
Sheet metal is the first disturbance factors
What kind of car what kind of sound for installation, how to achieve the best results. In general, the car in motion the process
when the board gold and low-frequency audio playback, if the sheet metal and thin, then, will produce low-frequency resonance noise
issue will have to cover more low-frequency part of the music, which affects the car stereo three-dimensional effect.
speaker placement is also critical
In addition to differences in body structure, the different origins of the car his car speakers to install the original settings used are
different. If you just purchased and installed an ordinary stereo system, car owners are best placed in the car horn back door back
door. And then if you install AV systems for surround effects you can follow the example of the pursuit of Japanese and American
cars, in the occipital area after the installation of speakers. The front door of the car horn, the midrange speaker should be installed at
the front door, installed in the dashboard or treble the A-pillar when the sound is best.
Engine compartment noise can also affect the results
In addition to the body thickness, the original vehicle to install a car horn sound on impact, the car engine work state and work
the noise characteristics of the car also has a larger sound interference. Thus, in the modified car stereo installation, be sure to pay
attention to the installation of insulation in the engine compartment area of ??cotton in order to play a sound, sound-absorbing effect,
clean crew to enjoy the car audio environment.
Interference of electronic systems can not be ignored
In addition, with a high degree of automation of modern cars, car body types circuitry clouds, to the owners of these electronic
systems bring great convenience and driving fun at the same time, but also to some extent interfere with the enjoyment of pure car
within the sound. General Japanese car circuit car audio interference will be smaller, because Japanese cars are often used-car
computer system was not as good as European and American cars more reason, and the U.S. Department of European cars generally
use high frequency board computer and therefore more prone to interference with the sound system electronic noise.
Tips:
Japanese vehicles into points
Japanese cars in general as thin sheet metal, be sure to install the sound when the success of the “sound system Zhen” work,
work focused on the car at the door. It is estimated that 2 million if the investment is generally 30,000 yuan installing car audio car
Japanese descent, then generally need to spend 2000 yuan do “sound system Zhen” work.
European cars modified points
If it is a race car, then in Europe, as European cars of thick sheet metal, the door seal is good, can play an additional role of the
speaker, so only the original speakers in the door panels to make a magnet at the small piece of “sound system Zhen”, will be able to
achieve very good results.
pages of national refurbished car audio industry new products listed on Freeway
Medium and small print off at 10:37:47 on December 7th, 2005 Source: Beijing Evening News
By the FREEWAY company, launched in Guangzhou Electronics Co., Ltd. Lotte edge of the new Freeway car audio market, the
product on the market cover the latest and most popular USB interface series, OEL animated series, GPS navigation series, dozens of
products in recent . Some products with European and American markets products were introduced, the product not only advanced,
stylish and more user-friendly, car audio industry for national development has opened a new page. It is reported that the product
price from several hundred dollars to million to meet the needs of different consumer groups.