The speaker's little knowledge

Whether the speaker is 2.0 or X. 1 structure, it will take some time to achieve the best effect. However, many people may not understand how to use it correctly. Now I will teach you some secret skills.

0 1 Correct operation sequence of speakers

In order to prolong the life of the speaker, when we turn on the power supply of the speaker, we should first adjust the volume of the speaker to a relatively small value, then turn it on normally, and then slowly adjust the volume to a suitable size. The purpose of this is to prevent the built-in power amplifier chip of the speaker from being damaged by the impact of instantaneous current generated by startup. Similarly, when turning off the power supply, you should also pay attention to turning down the volume of the speaker before turning it off. In addition, after working for a long time, the internal temperature of the speaker will gradually increase. At this point, you should let the speaker "rest" for a while, or lower the volume to avoid damaging the speaker. When the speaker is not used, the power supply of the speaker should be cut off and the power plug should be unplugged at the same time to avoid the chip inside the speaker being damaged by electrostatic current.

Only by making a good speaker can you listen to music well.

Speakers, like cars, need to be run-in to achieve the best use effect. Professional software, such as AX- Bao Bao, can help you "tune" the speaker to an ideal working state as soon as possible.

1. It is recommended to use a medium volume when cooking boxes. If excessive volume is used for a long time, it may damage the coil heating speaker. In the software, you can choose the signal of -6dB to cook the box.

2. Place the speakers face to face. Make sure that the front panels of the speakers are parallel to each other. If the speaker is inverted, the inverted hole can be blocked with cloth to ensure that the signal is sent out in one direction.

2. Seek to improve the knowledge.

Sound probably includes power amplifier, peripheral equipment (including voltage limiter, effector, equalizer, exciter, etc. ), speakers (speakers, speakers), mixers, audio sources (such as microphones, musical instruments, VCD, DVD) display devices, and so on.

Among them, speakers are sound output devices, speakers, subwoofers and so on. The sound box includes three kinds of speakers, high, low, medium, three but not necessarily three.

The combo is the integrated audio chartered flight produced by the manufacturer, which is as complete as possible, easy to use and gorgeous in appearance. All components of combo, such as speaker, power amplifier, card holder and CD holder, are provided by one manufacturer, with good overall coordination and relatively uniform and beautiful appearance; After purchase, users don't need to spend a lot of time debugging. Generally speaking, Pioneer plc audio can be used directly, with more convenient operation and complete functions.

Many people think that the quality of audio is not high, but in fact, with the development of electronic technology, the performance of audio has been greatly improved, so for most users, audio can fully meet the needs. Of course, the price, quality and performance of the stereo are also very different. There are thousands of products and tens of thousands. Which one is needed can be selected according to the economic strength and needs of users.

Classified audio can generally be divided into mini speaker and home theater sets. The main feature of digital audio is 1. The recording form of digital audio with high signal-to-noise ratio is binary coding, and only "0" or "1" is needed when playing.

Therefore, the noise of the recording medium has little influence on the signal-to-noise ratio of the reproduced signal. Analog audio recording is a continuous sound signal, which will be affected by tape noise during recording and playback, and will be superimposed on the sound signal, making the sound quality worse.

Although noise reduction measures have been taken for analog audio, they cannot be eliminated fundamentally. 2. Low distortion In the process of analog audio recording and playback, the nonlinearity of the magnetic head will introduce distortion, so measures such as AC bias magnetic recording must be taken, but the distortion still exists.

In digital audio, the magnetic head only works in magnetic saturation and nonmagnetic state, that is, 1 and 0, and there is no linear requirement for the magnetic head. 3. Digital audio equipment with good repeatability will not deteriorate the sound quality after repeated reproduction and playback.

In the traditional analog cassette tape recording, the recorded noise will increase every time the tape is re-recorded, and the signal-to-noise ratio will decrease by about 3 dB every time it is re-recorded. The sub-band is not as good as the master band and the grandchild band is not as good as the sub-band, and the sound quality will gradually deteriorate. 4. Digital audio playback system with small jitter rate. Because of the time-base correction circuit, the instability of the rotating system and the driving system will not cause jitter, so there is no need for a precise mechanical system like analog recording.

5. The digital sound with strong adaptability records binary code, and all kinds of processing can be carried out as numerical operation, and it can be operated only by software without changing hardware, which is convenient for microcomputer control, so it has strong adaptability. 6. Because digitalization is convenient for integration and VLSI, the whole machine is convenient for debugging, stable in performance and high in reliability, which is convenient for mass production and can reduce the cost.

Edit the sound principle of the mixed sound in this paragraph. Vibrator sound+paper drum horn sound. The combination of traditional (ordinary) sound and vibrating sound includes both the vibrating sound of vibrating sound and the speaker sound of traditional sound.

The midrange mixed sound mainly combines the vibrating technical principle of vibrating sound and the sounding principle of the paper tympanic membrane horn of ordinary sound, and integrates them into one; In fact, the mixed sound of * * * vibration is easy to understand. Media vibration is produced by vibrating media, and mixing is a combination of traditional speaker sounds. Generally speaking, it is a combination of traditional ordinary sound and vibration sound. Needless to say, the sound quality is clear, and the subwoofer effect is remarkable. It should be sold in major cities all over the country now. Music enthusiasts who have never seen such a sound can experience it and should not let you down! The sound-making principle of ordinary (trumpet) sound is mixed sound of medium vibration, and the sound-making principle is vibrator vibration sound+paper tympanic membrane trumpet sound. People who often use stereos know that except for professional stereos, the heavy bass of ordinary stereos is not enough, and good bass is generally not small in volume. This is mainly because the sound using the loudspeaker is greatly influenced by the size of the sound generating unit, so many multimedia sounds directly use the subwoofer. External speakers fully expand the volume range of their sound generating units, but this greatly limits the shape of the sound, which is why the sound we see in the market is generally square and angular, and the bass effect is not very good. The principle of vibrating sound. The vibration sound that only appeared in recent years is the principle of using vibration medium. Generally, heavy bass has good effect, slim volume and strange shape. It is estimated that many music enthusiasts will exclaim. Is this sound, too? ! ! However, vibration sound also has its fatal defects, such as insufficient or almost no high pitch. Once it leaves the medium (that is, the sound contact surface), the sound is almost gone. These are the problems we should consider when buying vibrato, which is inseparable from the medium and limits the place to play.

Acoustic medium * * * principle of vibration mixing sound medium * * vibration mixing sound is only a combination of the two. The vibration medium with vibration sound just solves the problems of insufficient bass and excessive volume of ordinary sound, and at the same time, combined with the sound of ordinary speakers, it well solves the defects that the vibration sound is not as high as the middle and high notes and cannot be separated from the vibration medium. It can be said that the medium * * * vibration mixed sound is still a good balance between ordinary sound and vibration sound, with complementary advantages and professional sound effects. Needless to say, it has no restrictions such as "square" and "circle", and designers can shape it freely. Media * * * Vibrating mixed audio uses a wide range of media * * * Vibrating mixed audio, which can be used with personal devices such as mobile phones, MP3-5, notebooks, desktop computers, game consoles, mobile DVDs, etc., and can be used by family and personal sound reinforcement devices.

Especially those equipped with lithium batteries can be used indoors or outdoors. Like Peng Yi Audio, almost all of them are equipped with lithium batteries, and the single play time is longer.

3. Some knowledge about acoustics

The diaphragm of the loudspeaker is made of paper or plastic. No matter what its material is, when the speaker is working, the diaphragm will move back and forth to push the air, and then the vibration will be transmitted to the human ear to make people hear the sound. Ordinary inverter speakers, the diaphragm of the speaker is exposed to make sound, and there will be vibration behind the speaker. If you also use the backward vibration of the speaker, it will strengthen the sound wave and strengthen the heavy bass. After installing the inverter tube, because the diameter of the inverter tube is smaller than the diameter of the speaker, there will be strong sound waves rushing out of the inverter tube. In this way, the forward and backward sound waves of the speaker will be utilized and the sound quality of the speaker will be improved. However, the installation position of the inverter tube of the common inverter speaker is different. Some products on the market install the inverter tube behind the speaker and in front of the speaker. When placing the speaker, be careful not to stick the back of the speaker on the wall, because this will hinder the pronunciation of the inverter tube. Some products install speakers in front of speakers, and inverter tubes are also installed in front of speakers; Some products install the speaker at the bottom of the speaker and the inverter tube in front of the speaker. This kind of products are called "bottom booster speakers", and most of them are ramblers and Philip. Regardless of the location of the speaker and inverter, in fact, their playback effects are similar, and the bass effect is similar. Let's introduce the subwoofer.

Subwoofer is a popular product in recent years. The picture on the right of figure 1 shows the basic structure of this loudspeaker. As we already know, when the speaker is working, it sounds back and forth at the same time. In fact, experienced people will know that the vibration amplitude of any speaker is greater than the vibration amplitude of the speaker emitted backwards, which is for sure. Otherwise, why don't ordinary inverter speakers reverse the speakers? The reason is that the diaphragm in front of the speaker is larger than the diaphragm in the back. It is not difficult to imagine that the subwoofer effect will be particularly strong if all the vibration emitted by the front speaker is discharged by the inverter tube. This is the case with the subwoofer. The loudspeaker of this loudspeaker box is built in the loudspeaker box, and only one inverter tube is exposed in the whole loudspeaker box, and the backward vibration of the loudspeaker box is eliminated by damping materials. Generally, subwoofers are made of cotton. There are many subwoofers on the market. You can see that there is only one inverter in front of the speaker, and this is it. The bass effect of this speaker is much stronger than that of ordinary inverted speakers.

4. Common sense for home audio, what kind of center speaker to choose.

The general home theater system can be divided into three parts: sound source, power amplifier and pronunciation unit. For home use, the sound source can be an ordinary CD player or a professional CD player. If you choose a DVD player, the back 5. 1 channel jack is absolutely necessary, and it should also provide support for Dolby AC-3 decoding and DTS decoding.

The choice of power amplifier is of course important, but there is an important principle that the power amplifier and the speaker should try their best to match the power and impedance. The first thing to do is the matching principle. Otherwise, the speaker system is either weak, dry or hoarse. In addition to pure music amplifier, AV amplifier is also widely used in home audio or home theater. However, because the power amplifiers of all speaker units are concentrated here, the performance in different ranges of high, medium and low will be limited, which depends on what timbre you value more. Generally, we suggest that the maximum output power of the power amplifier is 1.5 times of the rated power of the speaker, and the multiple of the bass part is higher.

However, it is forbidden to tease speakers with power amplifiers. The speaker can be said to be the most important part of audio. After all, the whole system here is funny, and the difference in texture will directly affect the final sound quality. Therefore, we advocate selecting speakers first, and then setting up power amplifiers. At present, the speaker products on the market are mainly composed of two parts: unit and box, which are divided into treble unit, midrange unit, bass unit and subwoofer unit.

The box is the first part of the speaker we see and touch. Technically speaking, the sound effect of wooden boxes is better than that of boxes made of other materials, and solid wood boxes are the top grade in wooden boxes. When selecting boxes, we can feel the sound and texture of the box board by tapping and moving. Generally, the sound is clean and crisp, and the sound effect of heavy boxes is better.

5. Reliable knowledge

Power amplifier is commonly known as "amplifier". Its function is to amplify the weak signal from the sound source or preamplifier and push the speaker to make sound.

A good set of audio system power amplifier plays an important role. The power amplifier is the most basic equipment in the audio system. Its task is to amplify the weak electrical signal from the signal source (from the mixer in the professional audio system) to drive the speaker to make sound.

Power amplifier, referred to as power amplifier, can be said to be the largest family of all kinds of audio equipment. Its main function is to amplify the weak signal input by audio equipment and generate enough current to push the speaker to play back the sound. Considering the differences in power, impedance, distortion, dynamics, application scope and control and adjustment functions, different power amplifiers have different internal signal processing, circuit design and production technology.

Power amplifiers can be divided into Class A (also known as Class A), Class B (also known as Class B), Class A and B (also known as Class AB) and Class D (also known as Class D) according to the different conduction modes of power amplifiers. Class A power amplifier refers to an amplifier in which any power output element of the amplifier will not be cut off (i.e., output will stop) during the whole period of the signal (plus or minus two and a half periods of sine wave).

Class A amplifier will generate high heat and low efficiency when working, but its inherent advantage is that there is no cross distortion. Single-ended amplifiers all work in Class A mode, and push-pull amplifiers can be Class A, Class B or Class B. ..

Class B power amplifier refers to an amplifier in which the positive and negative two half periods of a sinusoidal signal are amplified and output by two "arms" of a push-pull output stage in turn, and the on time of each "arm" is half a period of the signal. The advantage of class B amplifier is high efficiency, but the disadvantage is that it will produce crossover distortion.

Class A and Class B power amplifiers are between Class A and Class B, and the on-time of each "arm" of push-pull amplification is longer than half a period of the signal and less than one period. Class A and Class B amplifiers effectively solve the cross-distortion problem of Class B amplifiers, and their efficiency is higher than that of Class A amplifiers, so they are widely used.

Class-D power amplifier, also known as digital amplifier, uses extremely high frequency switching circuit to amplify audio signals, which has the advantages of high efficiency and small size. Many class D power amplifiers with power as high as 1000W are as big as VHS video tapes.

This kind of amplifier is not suitable for broadband amplifier, but it has many applications in active subwoofer. According to the number of amplifying elements in the output stage of power amplifier, it can be divided into single-ended amplifier and push-pull amplifier.

The output stage of a single-ended amplifier consists of an amplifying element (or a plurality of parallel elements) for amplifying positive and negative signals for two and a half periods. Single-ended amplifier can only work in class A..

The output stage of push-pull amplifier has two "arms" (two groups of amplifying elements). When the current of one arm increases, the current of the other arm decreases, and the states of the two arms alternate. For the load, it seems that an "arm" is pushing and an "arm" is pulling, and * * * completes the current output task.

Although Class A amplifiers can use push-pull amplification, it is more common to use push-pull amplification to form Class B or Class B amplifiers. According to the different types of power amplifier tubes in power amplifier, it can be divided into courage machine and stone machine.

Courage machine is a power amplifier using electron tubes. Si Tong Machine is a power amplifier using transistors.

According to different functions, preamplifier (also called pre-stage), power amplifier (also called post-stage) and combined amplifier can be used. Power amplifier, referred to as power amplifier, is an electronic device used to enhance signal power to drive speakers.

Power amplifier without auxiliary functions such as signal source selection and volume control is called post-stage. Preamplifier is the pre-amplification and control part before the power amplifier, which is used to enhance the voltage amplitude of the signal and provide input signal selection, tone adjustment and volume control.

Preamplifier is also called pre-stage. An amplifier that installs a preamplifier and a power amplifier in the same box is called a combined amplifier. The common power amplifiers in our family are generally combined.

According to different purposes, it can be divided into AV amplifier and Hi-Fi amplifier. AV power amplifier is a power amplifier specially designed for home theater, which generally has more than four channels and surround sound decoding function, and has a display screen.

The main purpose of this power amplifier is to really create the sound effect of the movie environment and let the audience experience the cinema effect. High-fidelity power amplifier is a kind of amplifier specially designed to reproduce the true color of music with high fidelity. Generally, dual-channel design is adopted, and there is no display screen.

According to the different components used, the power amplifiers include "Bold" [electronic tube amplifier], "Stone" [transistor amplifier] and "IC amplifier" [integrated circuit amplifier]. In recent years, due to the application of new technology and new concepts in the gallbladder machine, the electronic tube, an ancient vacuum device, shines brilliantly, and its beautiful sound makes many fans fall in love.

Almost all experienced enthusiasts have one. "IC power amplifier" is rarely seen in HI-FI power amplifier, because its timbre is not as good as two power amplifiers.

Power amplifiers can generally be divided into three categories: professional power amplifiers, civil power amplifiers and special power amplifiers. "Professional amplifier" is generally used to amplify the sound of conferences, performances, halls, auditoriums, venues and museums.

The design is based on high output power, perfect protection circuit and good heat dissipation. When the timbre of most "professional power amplifiers" is used for HI-FI playback, the sound is very unpleasant.

The detailed classification of "civil power amplifier" includes "HI-FI power amplifier", "AV power amplifier" and "KALAOK power amplifier" which integrates various common functions. "HI-FI power amplifier" is the power amplifier of our enthusiasts, and the output power is generally below 2X 150.

The design aims at "beautiful timbre and high fidelity". All kinds of high and new technologies are embodied in this power amplifier.

Prices also range from 1,000 yuan to several hundred thousand yuan. High-fidelity power amplifiers can be divided into two types: split power amplifier (which separates the former power amplifier) and combined power amplifier (which combines the former power amplifier and the latter power amplifier into one).

Generally speaking, the "splitter" is higher than the "combiner" in terms of signal-to-noise ratio, channel division and other indicators. And it is easy to compare sounds through signal lines.

The invention has the advantages of convenient use and relatively low cost. The output power of even-odd combiner is generally designed to be below 2X 100W, and many manufacturers produce high-grade combiner with 2x 100 W or above ... "AV" power amplifier is a runaway dark horse in recent years.

6. What is the common sense of 6.HIFI sound?

HIFI. It is a system, sound source, power amplifier, speaker, wire, listening environment and so on.

There are many kinds of audio sources, among which CD player (CD. DVD.BD) is the most common one. Enthusiasts often play LP vinyl and even open the machine. . There is also a PCHIFI. Based on PC, lossless compressed songs such as APE are generally played.

Power amplifier. This can't be done in three days and nights. Simply put, there are commonly used combined power amplifiers and split power amplifiers (front stage+rear stage). In terms of amplification methods, there are electron tube power amplifier (courage machine) and transistor power amplifier (ordinary power amplifier), class D power amplifier and so on.

In terms of size, there are floor boxes, bookcases and satellite boxes. Floor speakers are generally divided into three frequencies, namely, high bass speakers and medium bass speakers. The bookcase is generally divided by 2, which is the tweeter. Satellite speakers with full-range speakers and independent woofers (subwoofers) are better. Different boxes have their own advantages and disadvantages, for example, floor-standing boxes show better dynamic scenes. The bookcase is more suitable for listening to human voices, strings and so on. The satellite box is small and suitable for home use. Of course, there is no absolute thing in the world, and the advantages and disadvantages are only general.

Wire this is a controversial place in HIFI field. The focus of the debate is whether the wire is useful and how useful it is. All signals are transmitted through wires. How much does the wire quality affect the sound quality? Hey, hey, try it yourself.

Environment Listening environment is very important. It doesn't mean that a good set of equipment sounds good everywhere.

Audio is a profound knowledge, which needs to be understood slowly. It will be more efficient to concentrate everyone's wisdom, so that you can become a master. I will recommend my favorite audio to you. First of all, hivi and BOSS are not bad, and hivi's workmanship needs to be strengthened. In many cases, the corners of the box fall off and become warped. It should be noted that bose is an American product, probably because of American folk music. Bose stereo with hard power amplifier or low-pitched bass that will hum when it is loud, I personally can't accept it. Let me briefly talk about BT-audio Rose Home Theater, which is an American sound field theater with great sense of space positioning and presence. Designed with the technology of static speaker and dynamic balance unit, it shows amazing pitch, strong spatial sound field, needle-like positioning ability, clear and powerful, no sound and low frequency, amazing dynamic range and uniform timbre in each frequency band.

It adopts the traditional mahogany home design concept in China, and its appearance and effect are excellent, so it can be regarded as a real cheap cinema.

I hope the answer can help you.

7. What is the common sense of 7.HIFI sound?

HIFI .

It is a system, sound source, sound box, speaker, wire, listening environment and so on. sound source

There are many kinds, among which CD player (CD. DVD.BD) is the most common one. Enthusiasts often play LP vinyl and even open the machine.

There is also a PCHIFI.

It uses PC as the sound source and generally plays APE. -mainly for speakers, this is the most important. Pay attention to power and frequency response. Please choose a low power that will easily affect the neighborhood. They are useless if they are too big. Try to choose a wider frequency response. The second is the driver, that is, the speaker. This is selected according to the personal listening environment. Generally, urban households with lower power can choose about 50W. If there is a big listening environment, they can.

-Hi-Fi sound common sense is that the sound recorded by the sound system can be close to the real sound, which is called Hi-Fi (high fidelity). It doesn't matter if you are just starting out. Go to the store to listen and compare, and your ears will listen. At least you should know the difference between what sounds good and what doesn't.

Hi-Fi consists of three main components: signal source (CD)+ power amplifier+speaker.

8. Maintenance knowledge of small speakers

Scientific maintenance of audio equipment is the key to prolong its life. The following are some basic knowledge of daily maintenance:

1, and the normal working temperature of audio equipment should be 18℃~45℃. Too low temperature will reduce the sensitivity of some machines (such as electron tube machines); If it is too high, it is easy to burn out the components or make the components age prematurely. In summer, special attention should be paid to cooling down and maintaining air circulation;

2, audio equipment to avoid direct sunlight, but also to avoid close to heat sources, such as heaters;

3. After using the audio equipment, the function keys should be reset. If the function key is not reset for a long time, its pull button spring will be in a stressed state for a long time, which is easy to cause dysfunction;

4. Before turning on the audio power supply, adjust the volume potentiometer of the power amplifier to the minimum, which is one of the most effective protection means for the power amplifier and speakers. At this time, the power amplification of the power amplifier is almost zero, at least in the case of misoperation, it will not cause harm to the speaker;

5. Turn on the CD player from front to back, that is, turn on the CD player first, then turn on the front stage and the back stage, and adjust the volume potentiometer of the power amplifier to the minimum when turning on. Turn off the power amplifier first and then turn it off, so that the amplification function of the power amplifier is completely turned off. At this point, when you turn off the front-end equipment again, no matter how big the surge current is, it will not affect the power amplifier and speakers. Adjust the volume potentiometer of the power amplifier to the minimum when using the same machine, and turn it off or put it back before turning off the CD machine;

6, the machine should be commonly used. Commonly used can prolong the life of the machine, such as some parts with motors (recording stand, CD player, CD player, etc.). ). If it is not rotated for a long time, some parts will be deformed;

7. Start the machine regularly. In the case of long-term non-use, especially in humid and high-temperature seasons, it is best to electrify for half an hour every day. In this way, the heat generated by the components in the machine can be used to drive away moisture, internal coils, speaker voice coils, transformers and so on. It can be prevented from being damaged by moisture.

8. Every once in a while, wipe the machine surface with clean and moist soft cotton cloth; When not in use, cover the machine with a dust cover or cloth to prevent dust from entering.

9. Fully introduce the knowledge about speakers.

Sound box is basically composed of sound box, frequency divider and box. It is divided into two units and three units according to the number of speakers. .

There is also a kind of integration of treble and bass, called coaxial unit. From the appearance, it is a unit, but actually it belongs to two units.

As the name implies, the frequency divider divides the audible sound frequency band [[20-20000Hz]] into several frequency bands and sends them to the corresponding speaker units respectively. According to the number of frequency bands, the high and low frequency bands are called two-frequency division, the high, medium and low frequency bands are called three-frequency division, and so on.

Box, usually made of logs or medium density boards, is divided into closed box [without phase-changing holes, the air in the box is insulated from the outside] and phase-changing box [with phase-changing holes] according to the box structure. There are also some unusual box structures: labyrinth, exponential, negative resistance, trumpet and so on.

According to the use scope of speakers, it is divided into: professional boxes [used for sound reinforcement of performances, halls, auditoriums, venues and museums]

Monitoring box [used for professional monitoring of various recording institutions] Civil box.

According to the placement of speakers, it is divided into bookcases and floor boxes. Bookshelves are mostly two-unit dual-frequency structures, which are mostly used in rooms within 20 square meters. Floor boxes are mostly multi-unit and multi-frequency structure. Use more than 20 square meters.

Performance indicators of speakers:

General speakers are marked with many of his application parameters. The most common are:

Power: generally measured by W or VA, the common one is nominal power [rated power, undistorted power], which refers to the maximum input power under the condition that nonlinear distortion does not exceed the standard range of speakers. It is the normal working power supply of the speaker, and it will not be damaged if it works continuously for a long time.

Sensitivity: It is defined as the sound pressure generated at a distance of one meter from the reference point when a pink noise voltage with a power of 1W is applied to the loudspeaker. Expressed in decibels (db). The higher the sensitivity of the speaker, the louder the sound will be under the same driving power, which is very important when using low power amplifier.

Impedance: refers to the pure resistance of the speaker when the audio signal is applied to the input end of the speaker. Common ones are 4 Euros and 8 Euros, and there are also 3 Euros and 5 Euros abroad. Pay attention to match the output impedance of the power amplifier when using. Especially for the gallbladder machine, it is very important to match the impedance of the speaker.

Frequency response range:

Its definition is not clear in a few words, but generally refers to the frequency playing range when the high and low ends of the speaker drop by MINUS 3 db within the audio range. Naturally, the wider the better. At present, it is not a problem for HI-FI speakers to reproduce 20000HZ or even 30000HZ at the high frequency end. However, due to the limitation of speaker caliber and box volume, it is not easy to achieve 20HZ at the low frequency band, and the low frequency band of general bookshelf speakers is even worse.

Well, now you know something about speakers. Seriously, it's simple, but it's not easy to do it well. It is not difficult for beginners to make an entry-level HI-FI speaker after mastering a certain knowledge of speakers. Especially now, some merchants have introduced many speaker sets. As long as you carefully install according to the production drawings, the success rate is extremely high. And because these kits have been carefully designed and matched by manufacturers, the sound quality and effect are guaranteed to some extent, and the cost is only half to a quarter of the finished product. Compared with a single set of imported speakers, the speaker carefully made by the author with the 8545K unit of Gentleman's Treasure, after the evaluation of many senior enthusiasts, the sound effect is by no means inferior to foreign goods, and the cost is only 3000 yuan, which is only a quarter of that of imported goods.

Don't make speakers, buy several units and frequency dividers, and buy a finished box to install. The speaker made in this way will never be good. And now there are too many fake and shoddy products on the market, and the quality cannot be guaranteed. A safer way is to mail order complete sets of equipment from some reputable sales units. If your carpentry skills are good, you can build the box according to the recommended drawings, or find a carpenter to help you do it, as long as the volume of the box matches the recommended volume of the bass unit.

10. I'm going to buy a HIFI stereo. What basic knowledge do I need?

Hifi sound system consists of sound source, power amplifier and sound box.

1. Sound sources can be, for example, CD, DVD, PCHIFI and portable players.

2. The power amplifier consists of a front stage and a back stage. From the design principle, it can be divided into class A, class A, class B and class A, which is the most ideal, but also the most power-consuming. Electron tubes are called courage machines, and transistors are called stone machines. The gallbladder machine is distorted greatly, but the timbre is warm, which Lao Shao likes best. Now everyone likes the stone machine, which has small distortion and convenient maintenance.

3. The speaker of 3.hifi stereo is a 2-channel speaker, which is different from 5. 1 or 7. 1 in home theater.

The price of hifi audio ranges from several thousand yuan to several hundred thousand yuan. For beginners, let's start with 1000 yuan.

You can go to some professional hifi audio forums to study, such as "Big Speaker Forum".