Purchase articles-Innate factors are very important: Speaking of home audio, it is really "three points depend on use, seven points depend on selection." After all, we are not DIY audio masters, more are to buy ready-made products, and the products are usually pre-made and packaged by the manufacturer, so how to choose and configure a good sound with "innate constitution" becomes our first To do.
The general home audio system can be divided into three parts: sound source, power amplifier and pronunciation unit. As a home speaker, the audio source can be a common disc player or a more professional CD player. In general, we do n’t recommend using MD player. Although the sound quality of MD is not much different from that of CD from aural point of view, after all, the sound of MD is a product that is transcribed after being compressed. The capacity of music is about half that of CD and smaller Naturally, there will be losses, and there is still a difference from the most original optical drive and disc drive. If you choose a DVD player, the 5.1-channel jack on the back is absolutely indispensable. You must also provide support for Dolby AC-3 decoding and DTS decoding. Do not choose products with built-in amplifiers.
The choice of power amplifier is important, but there is an important principle that the power amplifier and speaker should try to achieve "power matching, impedance matching". Simply put, the relationship between the power amplifier and the speaker is the horse and the car. Whether it is a "large horse-drawn cart" or a "small horse-drawn cart" will seriously affect the efficiency of the system and even damage the system components, so the matching principle is to do first of. Otherwise, the speaker system will either appear weak, dry, or exhausted. In addition to pure music amplifiers, AV amplifiers are more commonly used in home audio or home theater. However, since 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 which tone you value more. In general, we recommend that the maximum output power of the power amplifier is 1.5 times the rated power of the speaker, and the multiple of the bass part is higher.
However, it is forbidden to use the power amplifier to "find" the speakers. The speakers can be said to be the most important part of the audio. After all, the "voice" of the entire system is here. The slight difference in texture will directly affect the final sound quality. Therefore, we prefer to choose the speaker first and then set the power amplifier.
At present, the speaker products on the market are mainly composed of two parts: a unit and a cabinet. According to the composition, they are divided into a tweeter unit, a midrange unit, a bass unit, and an overweight bass unit. The cabinet is the part of the speaker that we first saw and touched. Technically speaking, wooden cabinets have better sound effects than cabinets made of other materials, and solid wooden cabinets are the top grade in wooden cabinets. When selecting the cabinet, we can feel the sound and texture of the wooden board by knocking and moving. The sound is generally clean and crisp, and the sound effect of the heavy-weight cabinet is better. The texture of the pronunciation unit depends on the skill of each manufacturer. However, it is worth noting that the silk membrane tweeters and metal diaphragm tweeters in the treble part have better performance, the sound is clear and crisp, and the transient response is good, which can effectively enhance the transparency and penetration of treble audio. As for the mid-bass unit, you can choose a paper diaphragm or a canvas diaphragm, because the material is more elastic, so the sound is thicker and more elastic. In the selection of the mid-bass unit, especially the bass unit, pay attention to the flexible connection part of the diaphragm edge and the bracket, the material is secondary, the key is to check whether the diaphragm has sufficient vibration on the bracket by tapping and touching space. Especially for the bass unit, if the vibration amplitude is small, the diaphragm stroke is relatively small, and the strength and elasticity of the bass will be greatly reduced.
Audition article-Must listen to genuine discs: Many people think that the discs are digital media. Even if they are pirated, the quality of the music will not be too much lost, but the price is much cheaper, so they buy pirated discs to "fill" their own. "Fever" disc library.
In fact, pirated CDs are really baubles. Because they are not copied from the master disk, pirated discs usually have missing codes or wrong codes, and because the production is rough, the sounds restored from the audio are far less authentic than the original discs. Some missing codes can be heard by ears through the sound system. Obviously, the midrange is pale, and the high and low ranges are rough and blunt. It makes people not only not enjoyable but more irritable.
By the way, some people may ask: Then I buy pirated discs to listen to pop music assembly? This option is feasible without worrying about the burn of the optical disc player or player. In fact, Xiao Zhu feels that buying pirated pop music not only burns the record player, but also does not get the original sound quality. To some extent, it is not as easy as listening to MP3.
Environment-The layout of the listening room: the listening room is the "singing room" of home audio. It is said to be the listening room, but it is actually a room in our residence, but why do we call it a listening room? What? Because it is different from other rooms, it has been specially modified for listening.
First of all, the large space is of great benefit to the spread and extension of sound, so we recommend that the listening room be selected in a room of more than 15 square meters. The height of the room should not be too large. First, the cost of installing sound-absorbing materials is relatively high. Secondly, the sound spreading in a higher space is likely to form bad reverberation.
Secondly, the listening room should choose a location that is neither noisy nor disturbed by noise to avoid noise affecting the listening effect. Again, sound-absorbing materials must be installed, usually thick curtains, tapestries, bookshelves can also play a role in sound absorption. But avoid too thick sound-absorbing layer, the sound-absorbing layer too thick will make the reverberation effect seriously reduced, just like listening to the sound in the prairie, the sound goes back and forth. Not only is the sound monotonous, but it also has a very bad effect on the sound field positioning. Speaking of which, it is necessary to mention the role of tapestries. The tapestry is both a decoration and a sound-absorbing layer. Not only is it beautiful and practical, but it can be changed at any time according to the fullness of the tone we feel. In addition, the structure of the room and the interior furnishings should not be too symmetrical, otherwise standing waves and resonances of sound in some frequency bands are easily formed in the room, destroying the balanced sound proportion in the sound field. Place the article-many attempts to create a sound field.
Moving the speaker home isn't just about putting a "POSE" on it. Even the woofer, 5.1 channel, 6 speakers should have their own positions. The center speaker is usually the main force of the human voice, so its role cannot be ignored. In general, the center speaker is best placed in the visual center in front of the listening room, such as above the TV. However, due to the mutual influence between the magnetic field of the speaker cylinder and the TV, as well as the vibration of the speaker and the TV shell, direct placement usually produces a bad sound effect. Therefore, we recommend that the center speaker can be placed on a separate stand slightly higher than the TV. The position should not be too high. For screens such as projection screens, there are no front-to-back restrictions.
The positions of the left and right main speakers need to be symmetrically arranged on both sides of the center speaker, and the distance should not be too close. The high and low position should be 0.3 meters above and below the center speaker in the central axis of the tweeter unit in the main speaker. Similar to placing directly on the ground or ceiling, the midrange position will deviate from the optimal angle, which makes people feel the sound field is chaotic. If you are using a bookshelf speaker, it is best to install a bracket without a speaker cabinet to ensure that the height of the speaker is moderate.
The role of surround speakers is mostly to create the diffusivity and breadth of the sound field, so it is more appropriate to be placed about half a meter away from the top. The sound field presented requires you to adjust according to your personal feelings. The bass is very weak, so there is generally no hard requirement for the placement of the bass unit. If you are not a professional audiophile, the position of the woofer will not matter.
Running-in-audio running-in needs to be done step by step: the use of audio is the same as that of a car, and it also needs a running-in period, especially for a newly purchased audio system. In the initial stage of use, do n’t use it as a speaker in the karaoke hall. Turn up the sound loudly. We recommend that you initially control the volume to about one-quarter of the maximum output. After 72 hours of use , You can appropriately increase the output to about half. Usually we do not recommend that you turn on the volume above two-thirds to use it. When the volume is too large, it will not only break the optimal output state of the rated power of the pronunciation unit, but also the excessive sound field is not conducive to the positioning and performance of various timbre and instrument sounds. It can only sound a mess, except for the shocking momentum There is nothing beautiful about it.
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