The speaker refers to a device that can convert audio signals into sound.In laymans terms, it refers to the self -containing power amplifier in the body of the speaker box or the subwoofer box. After the audio signal is enlarged, the speaker itself will release the sound to make its sound lighter.The speaker is the terminal of the entire audio system. Its role is to convert audio energy into corresponding sound energy and radiate it to space.It is an extremely important part of the audio system, and is responsible for the task of transforming the electrical signal into a sound signal for people to listen directly.
How to buy speakers
Preliminary understanding
For the initial understanding of a pair of speakers, you can use the steps of "observation, 掂, knocking, and recognition" to identify: that is, one observation process, two -掂 weight, three knocking boxes, and four recognition brands.
One -viewing technology is to judge the advantages and disadvantages of the quality from the first image of the speaker: of course, the speakers made of natural log Seiko are of course the best.Guarneri Homage (Mingqin), etc., but because of the difficulty of environmental protection, lack of resources in resources, and long time, such good boxes will never be popularized as "Piaorou" shampoo everywhere, and the price will definitely not be low.Therefore, the common speakers are decorated with a thin layer of wooden leather on the surface of MDF medium -density fiber board: speakers that apply real woody stainless exterior decorations, especially such as rosewood, sparrow, rosewood, walnut, 桢, red oak, red eraseWhen rare wooden leather, its natural wood grain visual effect is excellent, and the feel is smooth and comfortable.Especially those who are symmetrically butterfly pattern, and the piano brighter paint can be regarded as a multi -layer of the piano.The box of PVC (Li) plastic skin is a large road. Although the workmanship is fine, it is best to be considered as low -end goods.Although the box decorated with wood grain paper, it should pay more attention to whether the latch joints and horn installation of the luggage behind the box should be accurate when they look extremely extremely.Fake and inferior products generally do not pay attention to these details, so you can judge correctly with a little heart.
The second is the weight: Most of the good speakers are made of high -quality MDF particle boards of 18-25mm. High -end flagship speakers are made of overweight solid wood or multi -layer composite plywood such as rosewood and yellow pomelo, so the weight is very amazing.Often a pair of speakers have a net weight of 50 to 60 kilograms.Most of the low -grade large roads are used to use soft texture of the particleboard. The counterfeit and shoddy products use poor quality paper rubber plates, so the weight is generally lighter.The audio industry often says "the quality of the interior and the weight of the outsiders", and the heavy speakers must be better than the light speakers.However, we must be alert to bad merchants in the bottom of the sound body.
三是敲箱体：用指节敲击箱体上下左右前后障板，箱体各面均发出扎实而轻微的弹性声音，感觉板材质地坚硬厚实、内部有多根加强筋支撑，箱体结构合理, Strong, there are many kinds of sound insulation and anti -wave measures.The processing cost of this type of box is high and difficult, so there are few counterfeit products.If the knuckle tap the box to emit the empty sound of "噗, 噗", it means that the plate is too thin, the material quality is too poor, and the structure is unreasonable.And there is no sound absorbing material or strengthening the vitamin system inside, resulting in a large number of manfractions and resident waves in the box.It is impossible to get a good replacement effect when buying this speaker.
The fourth is to recognize the nameplate: the real good speakers all have a well -made gold -plated or chrome -plated nameplate mark. Generally, there are distinctive trademarks, companies, names, origin, corresponding indicators, etc. On the nameplate.The imported box has English such as: Made in XXX or ManuoFacture and corresponding trademarks, speaker indicators, etc.If there are only designin ... (XX design) or vaguely, only one national name is marked, and even except for the simple and not rigorous basic indicators, you can not see the place of production, the manufacturer, and the trademark and the registered labeling.EssenceMost of these three -product products are suspected of counterfeiting and pseudo -inferiority.The brand -name speakers pay great attention to brand image and corporate awareness. Therefore, the nameplate labels posted by the posts are very standardized and exquisite. Various indicators and corporate names and place of origin are available.Some nameplates are even made of thin metal plating of 24K real gold, and the fonts on it still have a bumpy feeling.The product is not only the date of delivery, the production serial number, but also the pairing serial number and the free box ID card.For such speakers, as long as the price is reasonable, you can generally choose.
Use technical indicators to judge the advantages and disadvantages
As mentioned above, there is generally a technical indicator sign behind the finished speakers: the content is nothing more than the frequency range, sensitivity, bearing power and impedance of the speaker.Among them, sensitivity is the most important indicator of speakers. To a large extent, it determines what kind of amplifier should be used for the box, how much power is needed to push, and so on.Most of the sensitivity of listening-level household speakers is between 86-92DB. For the same amplifier, the higher the sensitivity of the same volume (such as the volume to 10 oclock).The lower the power of the power amplifier, the lower the requirements.This is what people often say: this pair of speakers is better.Many professional speakers used in the OK hall are more than 100DB. No wonder many people feel that the sound is very powerful when they go to the OK Hall to sing karaoke, and they can get a lot of volume without effort.But dont think that the higher the sensitivity, the better. In fact, the speakers with more than 92DB are the lighter and thin metal pots, PP pots, etc., which will cause the control of the control horn to be damaged, soAs a result, the sound quality is thin, small, exaggerated, and hard, and the details and charm of many music are missing.Not very suitable for HI-Fi.And many brands with thick and soft and music flavors are usually relatively low. For example, the sensitivity of top speakers such as the British imperial ATC, Italian piano, and Zhuoli is only 82DB.Such speakers are often very difficult to serve. The giant without power output current requires that it can make it work in the ideal linear area, and the cost will never be small.
Another most important indicator is the frequency range.For example, the frequency range of the domestic boutique New Dek Guide Pricer No. 1 Booksthell is 60Hz ~ 20KHz ± 2.5DB, and 60Hz indicates the extension value of the speaker in the low frequency direction.The lower the number, the better the low frequency response of the speaker: 20kHz means the high -frequency extension value that the speaker can reach.The higher the number, the better the high -frequency characteristic.The ± 2.5DB of the suffix indicates that the distortion of the frequency range of the above paragraph above. The smaller the distortion, the smaller the frequency response curve.The distortion of some speakers is ± 3DB, and the frequency range should become wider.Some speakers do not indicate the indicator, and the frequency extension range becomes very wide.For example, if the above -mentioned compass is not explained, the distortion is controlled within the range of positive and negative 2.5 decibels, and the frequency range can be marked into 40Hz to 23kHz.It should be noted that the frequency range of non -bidding distortion is meaningless.If the manufacturer knows the offender, he can only be suspected of his bad intentions and intentionally deceive consumers. It also shows that the speaker index is irregular. The manufacturer lacks confidence in his products and it is difficult to make people buy with confidence.
The loading power is a reference indicator of the speaker. How many tiles are used to indicate that the indicator does not show the quality of the speaker, but only provides a reference basis for the optional power amplifierThat is to say, to promote the power amplifier required for the speaker at least 10W output power, but the amplifier greater than 200W or more should be used for full power output.Otherwise, there may be burning boxes.Generally speaking, there will be no push for home speakers, only if it is good or not, push the problem of bad, and the loading power of less than 200 watts is great to the use of ordinary families.Essence
There is also an indicator of the speaker. Generally, it is nominal value of 8Ω. The impedance value of most two -point bang box boxes is 8Ω, and multi -unit multi -frequency -type land speakers also have 6Ω and 4Ω.The smaller the impedance value, the greater the current current, the higher the power of the power amplifier.In my opinion, it is best to choose 8Ω impedance for home speakers.
Identification of overweight bass speakers
The quality of the overweight bass speaker directly determines the frequency response range of the speaker and the advantages and disadvantages of the bass effect.From the perspective of speakers paper basin design, the current market mainly includes materials such as "osmotic paper basin", "applied paper basin", "bulletproof material woven basin", "wool woven basin", and "CD film" and other materials.The advantage of "osmotic paper basin" is that the cost is low. The disadvantage is that when the power is too large, the low frequency seems strong, and the durability is poor.Make high -power use; these two types of products are available in general enthusiasts, but they are definitely not professional enough.The advantage of the "bulletproof cloth fiber woven basin" is that the bass is strong and powerful, and the performance of rock and percussion is quite prominent. It is suitable for the use of the main speaker in the high -power amplifier. The disadvantage is that the production process is complicated, and the price is naturally not cheap;The "advantage of the pot" advantage is that the effect of soft music such as light music is very ideal. It is suitable for positioning in the medium bass. The disadvantage is that the bass performance is not strong enough and the sense of strength is inferior; "CD film" is a new product appearing in the market.Excellent subwoofer speaker materials are obvious to all aspects, but because it has not been accepted by many manufacturers, it is rare to use such speakers.
The impact of materials on quality
The materials used in speakers are mainly divided into plastic boxes and wooden boxes.The thickness and quality of the material are directly related to the speaker cost, and it also affects the performance of the speaker.The larger the material density of the speaker shell, the smaller the vibration generated by the box when the sound is emitted, especially the active speaker with a high -power amplifier, and the thickness of the board is a powerful guarantee for the super bass effect to a certain extent.Therefore, the bass effect of plastic speakers dare not compliment.Obviously, low -end audio products must be plastic shell.But is the mid -range speaker must be wooden? The answer is no.This grade speaker is both wooden and plastic shell imitation wood, but some imitation products have completely reached the real level of falseness.Middle and high -end products must be wooden, but the medium -density board is still a multi -layer board, which also has a different effect on sound quality.Even if the selected plates are the same, the output power is the same. Different design structures and different boxes of the box may still be far from the sound quality.However, although some speakers use plastic boxes, they are also outstanding. For example, Creatives Sound Works speakers not only use plastic shells, but also have little size. At first glanceIt feels that it is really extraordinary. Whether it is sound or sound quality, the sound quality has reached the professional level. The bass also has a strong shocking power. Of course, the price is not cheap.
Remarks
First, pay attention to whether the sound of the speaker output is uniform. Because the sound source of multimedia music is mainly based on games and general music, the proportion of bass accounts for a large proportion and a small proportion of treble.
Second, pay attention to the positioning ability of the sound field.The quality of the speaker positioning ability is directly related to the on -site effect of users playing games and watching DVD movies.
Third, pay attention to the dynamic amplification limit of the speaker frequency domain, that is, when the user opens the volume of the speaker and exceeds a certain limit, whether the speaker can still maintain a uniform sound source signal amplification ability in the full sound field.
Fourth, pay special attention to whether the speaker box is resonant.Generally, a resonant phenomenon will occur when the speakers with thinner boxes or plastic shells below 200Hz will occur.A box resonance will seriously affect the sound quality of the output, so users should try to choose a wooden shell speaker when choosing a speaker.
Fifth, pay attention to whether the chassis is anti -magnetic.Because the display is very sensitive to the surrounding magnetic field, if the magnetic field of the speaker will affect the image on the screen, and even cause the life of the display to decrease, pay special attention when selecting.
Sixth, pay attention to the closedness of the speaker box.Because the better the speaker is, the better the output sound quality.The closed check method is very simple. Users can put their hands on the pores of the speaker. If there is obvious air out of or sucked into the phenomenon, it means that the closed performance of the speaker is good.
Speaker maintenance skills sharing
The speaker is an important part of the entire audio system, and it must be treated properly.
① Avoid places where the sun is directly exposed to sunlight. Do not close to the thermal radiated appliances, such as stoves, heating pipes, etc., and do not place them in a humid place.
② Before the speaker is connected to the amplifier, the power of the amplifier should be cut off to avoid damaging the speaker.
③ The feeder connection with the amplifier should be stable, and it cannot be dropped when the dragging is pulled. The positive and negative polarity cannot be mistaken.The feed line of connecting the speaker must be thick enough, and it should not be too long, so as not to cause losses and dampen damage.The maximum value of departure frequency response is ± 0.5DB (0.75mm2 wire maximum length 9cm, 1.5mm2 wire maximum length of 14m, and the maximum length of the 2.0mm2 wire is 21m.
④ Pay attention to whether the impedance of the speaker is suitable for the recommendation value of the amplifier.
⑤ Do not exceed the rated power.Otherwise, the sound quality will deteriorate and even damage the speaker.
⑥ The shell should be wiped with soft and dry cotton cloth. Do not apply furniture wax or benzene or alcohol.
⑦ The dust on the surface of the speaker can only be removed with a soft brush and cannot be removed with a vacuum cleaner.
固 speakers should be placed on a strong and strong floor to avoid the bass attenuation.Dont put the speakers too close to the wall.
置 Do not place the speakers too close to the electric disk, so as not to generate sound feedback and how to scream.
If there is a level adjustment, you can adjust it to satisfy the sound according to the requirements of the listener.

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