Loudspeaker and speaker surface mesh

The reason why a horn has a mesh is of course certain advantages. It can prevent dust, or avoid accidentally puncturing the paper basin, and can also prevent direct sunlight from reaching the glue element of the sounding unit, and when the temperature rises. There will even be a phenomenon of dissolution. Some are purely for appearance, and the appearance will look better when there is a mesh. Unfortunately, many speakers suffer from poor sound quality due to the cover. This is an iron fact, not an empty statement! The surface mesh that causes the deterioration of sound quality is not on the material of the "net", because most of them are designed to be "sound transparent", which means that the sound can pass through it smoothly without sound stains. In fact, the "supporting substance" of the mesh, the wooden frame, is the main cause of the sound stains.

To understand why the wooden frame has such a bad effect, first of all, please imagine what happens when the sound wave hits a hard solid, such as when the sound hits the corner of the speaker sound box, when the intermittent sound hits In a hard object, part of the sound will be reflected and mixed into the original direct sound wave. If the situation is serious, a series of sound enhancements and cancellations will occur. Therefore, the diffraction effect of the speaker sound box will affect the transparency and resolution in music. This is also the reason why some exquisite speakers are designed to be endless, which is to prevent the sound effects caused by diffraction.


The wooden frames of the surface mesh are quite similar to the "sides" of the speaker panel, and they can cause unnecessary reflection of sound waves. It will make the high frequency replay effect worse. In addition to listening to music on the net, the sound quality is better when put on the net. If it is a pure rubber mesh without wooden frame, of course there is no problem! Speaker Support A good speaker support should be made of the strongest material and the most stable structure. Because the more stable the support, the vibration and resonance from the floor will be isolated or reduced, and the speaker will be more Stable!


When a speaker is pronounced, it swings forward and backward by itself. Even the most stable frame cannot completely eliminate these phenomena. The most effective way is to put the speaker against the wall as much as possible. If the floor is the main one The source of oscillation should not be placed on the ground. The best way is to nail a sturdy bracket on the wall to put the speaker, the effect is much better than on the ground!


Choose the speaker bracket, of course, it is the most stable and hardest. Now there are many famous speaker manufacturers who make "original" brackets for their speakers, such as HEYBROOK, LINN, etc. But when you find a beautiful speaker stand, what else should you consider? First, pay attention to the carpet, because if you place the bracket on a thick carpet, it will not be very stable. The best way is to use screws to "carry" the bracket on the floor, and the screws pass through Carpets "go up" on the floor or concrete floor, which will have the most stable effect.


The winning effect is only randomly placed on the carpet. Secondly, I believe anyone will think that the increase in the frame has increased its stabilizing effect. A dealer in an audio shop used 100-pound objects to put his beloved Linn ISOBARIKS in the left and right brackets, respectively. It is said that the effect is good. The stability of the drive unit began a few years ago, and audiophiles have learned that it is very important to tighten the cartridge on the cartridge. It is also important that the speaker in the speaker is firmly fixed to the panel. Sometimes the screws are re-tightened, and the replay effect is immediately improved. Surprisingly, many large speaker manufacturers have ignored this problem, but some small manufacturers such as HEYBROOK, ARC, etc. have paid attention to this problem. These two small manufacturers use a special "bald head" screw that few people use, and the speakers are of course "stable"!


But here I want to explain that it is not any speaker. After blindly tightening the screws, there must be better sound effects. Because the metal outer frame of some speakers is too fragile, the screw is too tight, but it will deform it and affect the activity of the voice coil. In severe cases, it may even be damaged. Sometimes if the screw drill is in the wood, the wood "hole" will be "smooth" when it is too wide. At this time, you can put a few matchsticks to the "hole", and then the screw can be tightened again, or you can drill it. Afterwards, put in a special glue, so that the screws can be tightened again.


Some speakers are not tight, such as KEF, B & W, because this special design is called "air seal", when the screw is too loose, the "air seal" will be useless, and too tight will make the sound box too compressed , Forming irregular vibration of the sound box, so if the horn is of this design, it is best not to do it! One of the speakers has a built-in "gray player" to protect the speaker from excessive current to burn the speaker coil, especially the tweeter; this is very reasonable. If you are recommended to unplug the "gray player" of the speaker here, it seems Everyone may not be able to accept it, because the "Gray Warrior" is a protective device, and if the song is removed, the speaker will have "life danger" at any time! But if you think about it carefully, if the "gray warrior" protects the speaker without distorting the sound quality or "aliasing", of course, all can be retained, but if the speaker replay effect will really "alias" Treatment? "Grey", or "fuse", theoretically when the current passes, its impedance in the "cold" state is very low, but because the current in music is large and small, the load impedance is non-stop The ground changes, that is, the associated temperature is also high and low, so the impedance of the "grey man" is also high and low. This is where the problem lies. The low frequency in music instantly changes the impedance of "Grey" greatly, resulting in intermodulation distortion. A 2A "grey man" when a transient peak current passes, if the impedance of the speaker is 8 ohms, the intermodulation distortion is 2, this is a myth, but if you are a discerning person, you will have the smartest choice! Handling of room audio characteristics Few people can or do not want to spend a huge sum of money to renovate their listening room into a recording studio-like professional listening room! Therefore, it is more feasible to properly deal with the acoustic characteristics of the room. Most people only focus on the speaker placement and listening position, but when the room is "slightly" arranged, when the speaker impedance is 4 ohms, the distortion is higher to 4, which is the worst audible distortion that occurs in the worst case, so even the amplifier The distortion is only 0.005, but compared with the distortion of 2 caused by "Grey", the former is just in vain! Most amplifiers have built-in protection circuits to protect the speakers, so even if you remove the "gray" on the speakers, there should be a big problem. After removing "Gray Shi", it is necessary to use wires to connect back to both ends of "Gray Shi" supporter. Some people are in favor of aluminum foil, some people use a high-quality speaker wire of appropriate length, but according to the author's opinion, it is best to connect "Gray Shi" "The carrier is also removed, because directly connecting the signal wires at both ends is the best method of transmission. Perhaps some speaker manufacturers may think that there may be better music replay effects. Because each room is different, we cannot use three words to guide you how to deal with the room. But for the following principles, you may wish to give it a try!


If there is a bass turbidity problem in your listening room, most people think that it is caused by the sound absorption ability of different objects, but it is not, because most objects that have sound absorption ability have no sound absorption ability for low frequencies. Only the above frequencies have the maximum sound absorption capacity. There are only two exceptions, one is a hanging wooden floor, and the other is a room with a lot of glass. Therefore, the factors affecting low frequency are only the size of the room, the placement of furniture, and the placement of speakers.


In an ordinary family-style listening room, thick carpets, thick velvet combs and thick curtain cloth are the main sound-absorbing objects. The ideal situation is that they can be evenly spread on the wall and on the ground, but when not, some auxiliary sound-absorbing materials can effectively absorb some unnecessary sounds.


The best way to lay sound-absorbing material is to lay it down above the ear when listening, because direct sound will not be absorbed when it does not reach the listener's ear, but will initially reflect from the hard object to the listener's ear. The sound will not be mixed with the direct first time, so the interference of the direct sound will be lower. In some rooms, the sound waves and echoes can also be laid with sound-absorbing materials on both sides of the walls to reduce or eliminate them. Therefore, adding sound absorbers as needed is the best way to make the audio equipment fully play.
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