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The car maintains at ordinary times and needs to learn oneself in brief a check love car
Web Design And Seo For www.china-webdesign.com
pro audio speakers – China Manufacturer
Thank you for inquiry my pro audio speakers, Tel: +86.573.8468.1673, E-mail: futuresound@mailzj.cn
http://www.chinafuturesound.com/Professional-Audio/
Go before the car:From check the tire engine oil car start before, drive pass to examine a car tire by oneself a foetus to press, engine oil quantity etc., can lower several rates that a line of car suffers breakdown.The quality of the car tire, directly the influence drives a safety.Therefore, before launching a car, the car owner should observe first five shapes of tires(include spare tire) to judge tire status.Get into summer, when the tire exhausts increment the car owner might as well develop in fixed time from measure the good habit that the foetus presses.Use a simple foetus to press to account, can also test to find out more accurate tire foetus to press a value.Press the value to the car reference foetus of this number and frame in the car door or on the side in the door and make a comparison, then can know that the foetus presses whether normal.If its value is partial to big or be partial to small, then assemble the car of the tire unwell proper long distance driver, have to arrive a car to maintain store adjustment foetus to press.The motor lubricant is praised as \"blood\" of car, can have lubrication to the motor and sweep, cool off, seal completely, reduce to whet etc. function.If the motor engine oil is too little, will bring injury to car motor internal spare parts.The engine oil is excessive, then will produce to accumulate carbon, the oil consumes higher, the motor revolves resistance enlargement to cause the power lower to wait bad influence.Because the engine oil consumes much in summer, car owner\\ s beard specially keeps in mind if the engine oil is enough.Usually the car owner is experienced before the car from launching to take out an engine oil Chinese foot in passenger compartment, put he/she after wiping clean once home position, observed after again pulling out engine oil attain whether the position is placed in top and bottom of the limit, such as if be exact center placed in, express then that the car\\ s amount of engine oil is placed in ideal status.After starting:Prepare before judging the vehicle breakdown car start of Be just the square one that guarantees to go a car safety from the check.When the car Dai is soon and drive process in, driving to multiply by a personnel should also well transfer his/her own sense of vision, the sense of smell and sense of hearing etc., the exactitude grinds to judge if the vehicle appears breakdown.While starting engine, the driver should pay attention to indicators, such as the electric cell of observing the car gauge dish, amount of oil and water temperature…etc..Under the normal circumstance, these indicators order in the in a short time bright and put out, express that the electric cell of the car uses status normal, the oil quantity is enough and cool off liquid temperature reasonable inside the motor.If go car process in, the electric cell indicator keeps on a bright light and means that the electric cell of the car appears a problem and needs to be replaced;The oil measures an indicator not to put out and explains then that the oil quantity has been not enough;But the water temperature indicator is often bright, then mean to cool off liquid temperature over stipulate a value, driving has to immediately stop a line of car and need water temperature normal, the indicator put out a square to re- start.
pro audio speakers
Maintain small technique how make your love car shining such as new
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pro audio speakers – China Manufacturer
Thank you for inquiry my pro audio speakers, Tel: +86.573.8468.1673, E-mail: futuresound@mailzj.cn
http://www.chinafuturesound.com/Professional-Audio/
1, at ordinary times every 2-3 days the applied clear water clean a car once.If meet rainy day, the beard then cleans once every day, or after it is clear now will soon the car Be pure to clean.
2, be carriage up be stained with mire dirty, application clean wipes to wash whole carses by sponge, again flush, wipe stem by clear water.
3, wash to turn off a motor first before the car, keep motor from leading hot but dry a place that clean once washed.Under the hot sun or should avoid cleaning too big area a while under heat the weather.After the use cleans, should flush carriage with water right away, so as not to clean be dried after leave trace on the carriage.
4, carriage up be stained with greasy dirt, will in addition to the dirt sprays in the greasy dirt to make it melt, cleaning by cleaning again can immediately remove.
5, if the tire, steel fences in to be stained with greasy dirt, can use first in addition to dirt or clean as to it\\ s take into to clean, spray a tire again to maintain, can immediately own a jet black and bright tire with shining and like new steel turn.
6, if be stained with greasy dirt or appear to be suffused with on the insurance Gang white phenomenon, can use first to clean with hard brush clean to wash, treat to do an empress again spray leather to maintain, insurance Gang will shining such as new.
7, if the carriage surface touches rough feeling, then express it already drive carbon grain son or dirty grain is stained with to attach, can use to go to at this time dirty glue soil to take into to clear.Have to plus full water to glue to take a dirty grain while grinding, resume original smooth surface.
8, be when there is dirty grain on the car window can use first go to dirty glue soil of processing, again with the glass detergent wipe.
9, if when the stainless steel decoration has a rust spot can use go to dirty glue soil obviation of rust spot, again with in addition to the dirt polishes.
10, whole carriages drive pure after cleaning, don\\ t forget to use to be stained with to maintain lotion to wipe whole carses in Wen Mao, used for a towel again to wipe like this and then can make carriage bright and smooth
On sound
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mini loudspeaker – China Manufacturer
Thank you for inquiry my mini loudspeaker, Tel: +86.573.8468.1673, E-mail: futuresound@mailzj.cn
http://www.chinafuturesound.com/key-mini-loudspeaker-15/
The task of the latter class voltage preamp output audio power amplifier to enough to promote the speaker. It should be noted that as a modern stage, where the output power, distortion, frequency response, signal to noise ratio, damping coefficient, the conversion speed and a number of dynamic capabilities. Total output power, of course, no distortion at maximum continuous power (RMS) standard to measure the most appropriate. Generally will measure 8-ohm load at 1 kHz, this approach can be regarded as a practical and conservative parameters. Distortion related to the transient intermodulation distortion and harmonic distortion. This damping, such as pre-like stress, it was decided to amplifier control unit capacity of an indicator; slew rate and the role of the former class. Dynamic range is the level at rated power and clipping (severe distortion) the distance between the power ratio. A lot of power design institute in the past regardless of the superior power amplifier, the number will be listed in the instructions on the dynamic range of 2 to 3dB. This dynamic more than the lower rated power output after the class, the maximum practical value. After the amplifier circuit design, there are several, such as OTL, OCL and BTL. Enlarge the application of the components was divided into tubes (bile), transistor (atomic particles) Hybrid (gall mixed with stone) and integrated circuits. Work there are A, B, and Class A and B, to name a few. Can you list some commonly used tube model can be interchangeable? Tube origin throughout the world, from China, former Soviet Union, Eastern Europe and the United States. Its function for the voltage amplifier, power amplifier and wideband voltage amplification. Tube swap table 1.12AX7 6N2, 5751, ECC83, the 4004 2.12AVFA, 6N10, 6 189, ECC82, 4003 3.6DJ8 6922,6 N11, E88CC, ECC84, ECC88 types 4.6CA7, 6550,69279, KT88 is KT100 , EL34 5. Bbq5, 7189A ,68-14, EL84, CV2975 6.6CGF, 6N6 7.300B, 4300B audio system how to obtain a lively sound effects? Audio system to replay the lively musical instruments and human voice, power amplifier with speaker wire and speaker can be considered as a whole. The speaker is the only voice of the entire system link. Among woofer diaphragm, compared to the treble quality is most important, it is inert, the forward is not easy to instantaneous speed static, and then move in the opposite direction. Solution separated from use of a high damping factor (or match) In addition to improved speaker overall design of the amplifier to be instigated. To calculate the amplifier damping must own output impedance value divided by the impedance of the speaker (8 ohms). For example, the amplifier impedance of 0.05 ohms, which represents a damping factor of 160; 4 ohm speakers only 80. In fact, the impedance of the amplifier and speakers to follow the frequency of movements and change, this is not the speaker cable\\ s resistance value and therefore lower damping. Suppose the speaker wire has 0.7 ohms resistance value, coupled with the amplifier of 0.05 ohm to 0.75 of the number, only multiplied when divided by the speaker 8 ohm, about 11 of the damping coefficient. Lower when the speaker is 4 ohms to 5 on the practical application of the amplifier manual listed a far cry from the value. Some concept of the speaker unit inertia (high Q), the internal resistance of the amplifier and speaker wire must, in order to achieve a better unit control, and vice versa cone light, quick reaction, or even the whole speaker design are tend to the low Q value, then the appropriate damping coefficient is lower than 20 tube amp. It is true that some speakers with the damping coefficient as low as 25 tube amp, issued only a wonderful voice. As for the damping factor should be considered the best there is no official answer, in many cases subjective hi accounted for a large proportion. But in general, lively voice of the sound system can be close to real people hear vigorously. Could you explain the correct arguments and practices of the friction machine? Mount the machine to be based on the theory to practice, subject to different means and different equipment. (A) CD machine: generally inexpensive CD player to make more use of the less accurate operational amplifier IC, and this part is just the sound of the impact. Hence, the need for them for high-speed, low noise and broadband operation and put the IC. Bandwidth to achieve 3MHZ or more, which is based on digital signals flowing through the D / A converter, the audio signal will produce a large number of ultra-high-frequency noise, and the duties of the low-pass filter is to filter out these ultra-high frequency noise. If the frequency is not enough width is not linear, the audio range (20KHZ below) will respond to these nonlinear UHF brought modulation distortion, the sound stiff. Specifications is allowed, due to increase quiescent current work status close to the CPI, more sweet and pleasant sound. Similarly, the permission of the component pressure to increase the voltage to improve the performance of low-voltage power supply. Split part of the independent power supply to the analog circuits, and take multiple windings, respectively, for the various parts of supply, and thus can the interference between the subtrahend / analog circuits, but also be able to enhance the voltage. If the power transformer is installed on the printed circuit board, you need to dismantle it, the installation is to stay away from the chassis on the floor of the D / A converter. Power electrolyte capacitor values ??will be increased, and the parallel low-value metal polypropylene capacitors, so that the sound energy charge lag, high-frequency open analog circuit power to pay back the connected capacitors and output cross-connected capacitors for high-quality varieties. Line permitting, should immediately repeal the output cross-connect capacitance for direct cross-linked. The sound will be cleaner and lower coloration. (B) before the class: same replacement fever operational amplifier to improve the power supply system. The latter is to raise the voltage, enhanced dynamic will increase the capacity of the filter capacitor and toroidal transformers, the grade should also be high, and the shunt regulator or DC servo-regulator power supply, in addition, to pay back even the capacitor, cross-linked capacitors and resistors can also choose supplements, can improve the signal to noise ratio. Analytical and restructuring of the sound field. (C) after the class: work based on high current and high voltage power supply is particularly important. Switch to large toroidal transformers and filter capacitors in parallel a small capacitor at both ends of the latter, in parallel with a small capacitor at both ends of the latter, for the low-frequency energy and control, that is, even the high-frequency analysis of force there is a substantial help. Cheaper power amplifier, the output of the final stage quiescent current is generally low, so under the conditions allowed in the radiator to increase the current work status from B to A and B class. Transistors can be replaced more dedicated audio power varieties, but pay attention to the pressure and matching and other parameters. Overall, improvement of the line\\ s advantages are many, can also improve the effect of change component specifications better, but keep in mind the different species of op amps, and components, has its own tone, so the friction machine, in addition to pay attention to outside the established norms of the equipment itself, to allow a certain degree of \"friction\", but also carefully and gradually listen to compared to the extensive use of the components of the same brand is not necessary for the principle. Finally, moving equipment \"major surgery\" costly in which the value and worth hide from person to person, should be modest.
Structure and function of the audio amplifier
No matter which type of car audio power amplifier (hereinafter referred to as PA), which are composed of two parts, the power
supply and audio section, as shown. The first part of the vehicle power supply filtering, and then by the step-up transformer to
enhance the audio portion of the supply voltage to drive the speakers. Voltage step-up transformer to raise the requirements to
increase the supply current, voltage, the greater the greater the required current.
The audio amplifier section is to be low-level RCA jack input host low-level signals, or high level speaker input signal by the pre-
processing, to after-class power amplifier, power amplifier output to the output part. In the audio portion, but also signal processing
part is divided into pre-and post-class power amplifier part. Pre-signal processing part is when the input signal filtering (high pass, low
pass), adjust the level (volume control), as well as to enhance the low-frequency gain (usually in two-channel or single channel can
amplifiers have this feature ) part. Part of the power amplifier output, but also by the positive and negative signals to drive the
speaker is divided into two parts, two parts by two amplifier tube amplifier to drive, so the post-stage amplifier in the power of the
tube parts are used, respectively, to positive and negative part of the amplified signal. Class A power amplifier, AB etc. is by processing
the signal to distinguish between positive and negative parts of the state.
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
aesthetic evaluation of simple audio conversion Benz E280
Test vehicles: Mercedes-Benz E280
Sound System: France FOCAL (Jin Long)
System Configuration
audio: E280 original host vehicle
Before the sound field: UK Genesis P15 push FOCAL Utopia Be No.6
Bass System: UK Genesis MonoBlock push France FOCAL 21WX
Pre-processing: the United States to Fu 3SIXTY.2
car audio conversion is bound to destroy the original car s interior, which is the industry s indisputable fact. But the world is converted
into the original type and MODIFIED STOCK modified type, which is due to traces of a considerable number of consumers is too
obvious not to accept modifications that destroy the beauty of the original car, in the country there are many people who have
unfortunately car concept, which also has been the development of car audio conversion shackles. The evaluation of the first song
brothers converted, but in the modified open up Xi in diameter.
System 4
Audio part has not changed, E280 is the host of the original car DVD player with screen, but the U.S. first-class treatment to the
blessing 3SIXTY.2, to good fortune it is modified specifically for car audio and pre-class part of how parts of the distribution then the
adjustable processor with Bluetooth technology, can delay, equalization, channel distribution and other functions, in particular, can be
personalized for the car to the regulation. P15 is the UK s Genesis Genesis s flagship amplifier, the application of pure class A + G
technology to push the French FOCAL (fresh wave) utopian six-inch two-way set-level NO 6. Bass part of the Genesis Pure Class A
amplifier is used to push MONOBLOCK lifting style 21WX. In the latter part of the whole system level the match can be described as
pure musical class practice in music of such a system is impeccable. Application of the original car the host may make hardcore fans do
not recognize, but 3SIXTY function will sound a qualitative leap.
4 modified car ride
STK is a typical car traveling in the original-style modification, host bits do not change, NO 6 bass in the original installation location of
vehicles, and treble is also the location of the original car, the mold and placed in the angle at the front door, the treble mold
removable, and treble with the original without any changes can be installed directly. Treble the mold surface is high fever with civilian
sound card cover the surface mesh, and not as commonly used leather car audio conversion coating.
Modified trunk 4.5
Hoisting suitcase-style modification is the classic, installation, technology is also very particular about. Amplifiers and processors are
installed in a special plexiglass box, especially fine. Bass is the modified lifting luggage at the top who are not familiar with the
modification can not see traces of a similar surface with blankets and luggage handling. From the car after the conversion stage but
can not see the signs. Bass using lifting means, the biggest advantage is that will not take up trunk space, but the parameters of the
woofer for high, especially in power requirements.
Noise damping 4.5
European cars of the noise-isolation achieved very good results, E280 in order to ensure the sound effects, door and the vehicle will
be part of all in the U.S. Dynamic (kinetic energy) of the specific material handling, the overall effect of modified cars to new heights.
Tap the door to the touch and the sense of hearing can determine, the damping effect of which has been very solid, not hollow
echo.
Sound 4
FOCAL speakers known for their high resolution, high-density sensor is known, NO 6 is used beryllium tweeter, treble texture, density
sensor heights, Genesis Pure Class A power amplifier such as the silk-like quality playback lubrication. Bass is not the kind the world s
best personality, although only a bass, and the combination of the sound field before it is required that classical music is the kind of
modest, of course, if you play the world s best music, this E280 is not appropriate.
Tone 4
Sound can be elegant to describe the performance of the system from the power amplifier to the speaker s choice to say more on
the beauty of tone, not to care too much sound pressure and dynamics. Dvorak s “Ninth Symphony” in the performance of the
various voices and the sound of brass bands performed very texture.
3.5 sound field
Because the installation is STOCK, as treble the installation location is in the original car, and make the sound field is too forward, the
sound field depth is not deep enough, but the width of the better performance. By using this pre-processor 3SIXTY.2, time
alignment and equalization have good performance. Noteworthy is the low back with a convergence of sound field has been very
good, basically do not feel the bass is coming from behind.
News 4
Large dynamic down to listen or rich levels and details of the high level of car audio fever. As a result of pure Class A power amplifiers,
where the equipment is FOCAL Utopia-class equipment, large dynamic sound without distortion, and the level is very clear. Pressure in
the case of loud, bass although a bit compressed, but the bass content of the dive and the loose sense in this car to listen to, but
not chaotic and moderate.
Balance of 4.5
In normal listening volume down, balance can be said has been very appropriate, 3SIXTY powerful in the fact that the car can be
arranged and adjust the performance of the entire system, treble and tenor of the convergence and the transition is very smooth,
bass and low amount of sense, whether the interface is the interface between the frequency response performance in the music
seamless. Large volume, low-frequency slightly less than, but listen to pop music, light music without feeling.
4.5 overall comments
Modified Mercedes-Benz cars, the industry has many of the cases, but the first song on the brothers in E280 can learn at least two
modifications: First, to do with how good the original voice of the host vehicle; the second is in the process and selected materials.
Simple aesthetic adapted the system, but without losing the personality and highlights, in particular, focus on restoration of the
original car and the whole car modified to consider environmental considerations are worthy of the industry reference. The Pure Class
A power amplifier with outstanding performance FOCAL match, but also shattered the sound is not good use of the original host
fallacy.
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.
Passat audio conversion – worth 300 million yuan to enjoy
First, the power output. That is, a sound system, the host or the output power amplifier must be large, because of their greater
power output, it showed that they can control the audio greater linear range, then the stronger the ability to drive the speakers.
Replacement of a cost-effective high-power amplifier can immediately make your car audio performance very different.
Second, the price performance balance. Car audio system is a large system or whether the original car system, how to skillfully mix is
??the key. Well with the equipment itself will often receive higher than 20% -30% or even more than doubled the effect. So select
the equipment, be sure to according to the brand, performance to match. So that each component can play the best effect is to
change the sound effect out of the only way to save money.
Third, the gradual upgrade. Change the sound to consider the upgrade, at immediate cheap, nose, speakers are “will” come. At that
time appears to be saving money, may want to improve the future once only found things almost before the installation of waste pile.
So, before conversion should develop a reasonable budget, and within budget discussions with professionals configured for the future
upgrade certain amount of leeway.
car audio amplifier modifications selected few tips
car audio amplifier combination as an integral part of, its importance is self-evident.
Car audio as a mobile concert hall to become a solitary journey to enjoy. Whether or not the car audio enthusiast, the face of
these full of metallic equipment will be its unique magnetic properties are attracted to. But perhaps for most people, how to buy
satisfaction of the audio equipment is a problem.
Here we will introduce some of the power amplifier in a few selected tips.
The same benchmark to determine the power amplifier
Power sound system is the most important parameters, that sound system with a load capacity. This is why we should pay
attention to when buying the first place. But if all manufacturers are using their different performance measurement baseline to
identify the product, the lack of sufficient knowledge is often difficult to make an objective comparison. Amplifier is also true, in view
of the identification power amplifier should be aware of the following three points:
First, the battery voltage.
Car battery voltage is constantly changing, for the two common logo: 14.4V/100W, 12V/100W amplifier power is two
completely different shows. As the car in motion the process is basically the voltage at 12V or so, so the 12V voltage state of the
measured power value closer to the truth. Voltage of 12V and continuous basis in order to identify the power amplifier reaches more
than 12V can be achieved when more power.
Second, the harmonic distortion THD.
In comparing continuous output power amplifier is required in the same (or relatively close) THD value under. The value of THD
under different test out the sound difference is very obvious, sometimes the identity of the maximum power is high, but most likely
it s distortion and noise is also high. Therefore, check the maximum power of identity should also be aware of their value of THD.
Third, the frequency range.
Amplifier continuous power output should be in the actual frequency range used for testing. For the power amplifier should be
required to identify the full scope of testing only identifies a frequency power value has no meaning.
Benchmark in determining the same, since we can compare the power of the amplifier. Typically, when the sound system in the
general purchasing power output to follow the principles. The greater the output power amplifier, that they drive the speaker s ability
is stronger. Speaker amplifier power should be larger than indicated power, small power if used in long-term use of high power output,
easy to burn, can lead to poor sound quality, distortion and failure to appear.
Amplifier should have high-quality factors
Of course, relies on high-power text description can not be a better understanding of the power amplifier is 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 good performance of the power supply. 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.
Secondly, 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.
Furthermore, is 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 car amplifier when we do not make recommendations.
Clearly the different uses of power amplifier
Select the amplifier is given just by simple parameter specification is not enough, should be based on the sound system may be,
need a good listen to the views of other users or professionals, depending on the use of different types and brands of used amplifier.
According to different uses can be divided into the following categories:
1 subwoofer designed specifically for the promotion of the amplifier: built-in infrasonic filter, eliminating the need for external
filters.
2 with the equalizer amplifier: may be due to different personal preferences or adjust tone cabin space.
3.5-channel amplifier: typically use 2-channel or 4 channel amplifier to drive around the speakers, subwoofer amplifier is driven by
another, so take up too much space, and use the 5-channel power amplifier, an amplifier on the can solve the problem.
4 X card power amplifier multi-chip: a unique X card for the audio power amplifier provides a variety of sub-options: high pass,
band pass, low pass, or even super audio filter.
5 Electronic Crossover Modular Amplifier: The control module is to allow you to select which signal will be to the power amplifier
power amplifier and the RCA output, selected by the required frequency and crossover point. By replacing the module, you can make
a variety of power amplifier power amplifier into use.
Here, we choose only a brief introduction to some common sense tips PA to specific practical application, it must pass a
professional system design, installation, to get the perfect sound system.
GoRun song rhyme car audio product training will be the host
In early December 2005, Beijing has just ended a long few years since the mild winter, they experience a taste of winter cold at
first, while under the influence of the seasonal changes, the entire capital of the car audio industry inevitably decoration experience of
the winter off-season test. Generally, experienced owners who will normally recharge your batteries in this season, finishing the store,
safeguard the original customers, the power savings all season to prepare for the upcoming Spring Festival, but this year the quad
bridge Auto Parts City Jiaming car decoration shop, there was a different situation and in the past.
It is understood that, with the GoRun? Song rhyme brand auto parts market in Beijing and the major influence of the national
market continues to expand, coupled with the traditional model of car audio sales have been unable to meet the new generation of
digital music, the pursuit of pleasure vehicle customers, so in this case, GoRun? song rhyme manufacturers – East put themselves
together for electronic parts distributors and customers to provide a better understanding of the product of chance, held GoRun?
song rhyme product tour training sessions.
This time, I was invited to participate GoRun? Song rhyme associate store brand one – Beijing Quaternion Bridge City Auto Parts
store Jiaming training activities, personal experience of a network of automotive digital audio era charm of the host.
The product will be on-site training on the staff of the East Union Electronic detailed description of the fifth generation GoRun?
Song rhyme of the 6110 performance products, including CD, FM radio and shock resistance and other features are a comprehensive
exposition. In addition, specific products can be inserted U disk / SD / MMC cards are unique, to explain to customers who are often
able to use specialized digital storage products, such as: MP3, U disk, SD / MMC card, hard drives and other mobile devices, eleven
specific distribution store for all of the technical staff on-site demonstration.
Although the weather is very cold, but came to Beijing Jiaming store you shop for training technical staff to listen very carefully to
explain the factory workers, and the corresponding variety of details, at the same time, training will also attract non-auto city less
prepared to audio conversion users. After the technical staff have many stores that in the past too little understanding of the
product, simply selling products, and through this training will learn a lot of digital products and automotive-related, and in the future
be able to install these products provide more comprehensive and complete solution.
I personally believe that the current in the country so fast, practical and effective product training in the automotive electronics
industry is rare. Previous domestic market car audio manufacturers to provide information and technical services rather narrow.
Typically, there are generally some of the strength of the domestic manufacturers to form the new conference to organize a number
of large sales agents find out about the products to be listed, but some small retail stores are usually missed to participate, these scale
smaller manufacturers generally will not consider the specific circumstances of the market and products, new product introduction
after herd, and products to market only after the resignation, which is a lot of brands have been unable to sustainable development in
the car audio industry, the main reason.
To solve this problem, as has launched the first can be inserted U disk / SD card of the East-Link Electronics, not only in product
innovation, and sales and market segmentation in the operation of the implementation of a rational and effective training programs for
store associates, these specific measures to enable store associates close to the customer awareness of products and services to
enhance the good on both, so the majority of these store owners are able to provide more comprehensive services.