Causes and solutions of sound or burning speakers

[Introduction] Speakers in audio or broadcasting systems are often burned or broken, and most people intuitively think that the speaker will be too loud to be able to withstand it, so the speaker will be damaged. In fact, it is not possible in many situations. For example, the following situations and reasons are believed to help you maintain the longevity of the speaker for decades.

Loudspeakers in sound or broadcasting systems often burn or break. Most people intuitively think that the loudspeaker will be unbearable if it is turned on too loudly, so the loudspeaker will be damaged. In fact, there are many situations that are possible. Such as the following circumstances and reasons, I believe it can help you maintain the longevity of speakers for decades.

We often use a microphone to speak or sing because the microphone is too close to the speaker or facing the speaker, and the high volume will produce a high-frequency feedback feedback. This time your treble monomer may not work. This is because most of the signals from the middle and high treble are sent from the treble after the crossover. This high-energy signal burns the speaker through the extremely thin tweeter monomer, so when you use the microphone, remember The volume is gradually increased from the maximum, don't open it at a stretch, so that the speaker only emits low frequencies like cow sounds.

1. Opening too loudly will certainly damage the horn. Another situation is that the power of the amplifier is insufficient and the sound is turned hard. The output is all abnormal cutting signals. This situation will also damage the horn. It is recommended that users who prefer high volume should purchase high-power amplifiers. The low-power 30W post-stage is likely to burn out low-impedance large speakers.

2. If the amplifier has a DC output, it will definitely burn the woofer, and even a very small number of tweeters will burn. The reason is that there is no capacitor in the splitting path of the bass (or other sound path) speaker to isolate DC. The DC output is like passing DC power into the speaker, and even the crossover coil is burnt black. Therefore, when purchasing an amplifier, be careful not to use a power meter to measure whether there is DC output at the output of the pre-stage and post-stage.

3. If you install it yourself, you must know the high-frequency oscillation. If you are installing it yourself, please pay attention to the high-frequency oscillation. It is best to use an oscilloscope to check whether there is oscillation in the pre-stage and post-stage. Or DC output, in case you do n’t find out this situation, then maybe burn your advanced speakers enough to buy several 20MHz oscilloscopes.

Vacuum tubes with output transformers (or broadcast) will not have DC output (if you have them, it will be scary), but vacuum tube machines have become popular again. Pay special attention to vacuum tube machines that are prone to high-frequency oscillation or interference. The situation is the most common reason for speakers to provide you as a reference for daily maintenance.

Equipment rematch, Yin and Yang should be reconciled

I have always emphasized that the importance of collocation of equipment is far better than the quality of the individual equipment itself. If cheap equipment is properly matched, its performance will be better than poorly matched high-priced equipment. The principle of equipment matching is to find a balance point, just like a rocker, to find the balance point in the middle. For this reason, if we have masculine equipment, we will find a feminine one to make it sound smooth. If we feel that the sound is too bright, we will find a warm one; if it is too slow, we will match it with the faster one. In short, yin and yang are harmonious, rigid and soft, and finding a balanced voice is the main principle.

The power supply is clean, quiet and transparent, and is in the jungle of an urban apartment. Our home is full of various electronic interference pollution. Whether it comes from the power cord (the motor rotates, the fluorescent lamp flashes), the air (radio frequency interference, electromagnetic interference) from the air makes us unable to escape. In order to reduce these interferences, we try to make sure that electrical circuits with motors such as refrigerators, air conditioners, dehumidifiers, washing machines, etc., should not be combined with audio circuits. If you can pull the dedicated power supply, of course it is better. If you can not use fluorescent lamps indoors, try not to use them. The dimmer will also generate noise. In addition, there are some props on the market that are resistant to electromagnetic and radio frequency interference, as well as various power filters and processors.

How to tell if your power supply is clean? Quite simply, the cleaner the power supply, the clearer, quieter and more transparent the sound, and the better the layering. However, it is important to note that many people used to deal with the sound thinner, and in the end only a clear and dry midrange, thin midrange and insufficiently rich bass, this is wrong. The correct sound should be high-pitched sweet water, mid-range is full and full, low volume is sufficient and flexible.

The connector is frequently wiped, and the thread head must be locked. The so-called connector is the connector for signal input and output. After being used for a long time, these joints are difficult to be protected from the air, and produce a layer of oxide on the surface. When the male and female connectors have a layer of oxide, is the signal cable that you spend a lot of money still useful? What should I use to clean the connector? There are many kinds of small items on the market that can be removed. Just ask at the audio shop.

If the joint is very oxidized, you can also go to the automobile materials shop to buy something similar to clean aluminum 99. These abrasive cleaners are very powerful and will wear off a thin layer of the surface of the joint to ensure cleanliness. But pay special attention to it, never use this cleaner to wipe the panel or the gold-plated knob, it will make them no gold-plated luster.

After you have cleaned the surface of the joint, you can buy a wipe that contains a light oil. Wiping the surface of the joint with this kind of paper will keep them non-oxidizing for about a month.

Again, what does it mean to tighten the thread? The wire head refers to the horn wire head. If the horn wire head is not locked, the impedance change it produces may adversely affect the low frequency. In my experience, it is best not to use the terminals of the speaker wire, but directly lock the bare wire to the terminal, so as to get the best contact surface. If you must use a terminal, try to use a thin and soft pure copper Y-shaped plug, this terminal can be locked tightly. The thicker and harder the terminal, the worse the contact effect. If the output and input terminals can be cleaned and the speaker cable is locked, it seems that the body's blood and meridians are not obstructed, and the sound will be better.

Buy a leather sofa, good sitting and sound and durable, whether you are buying a single seat or double, three or even a complete sofa, I suggest you buy a leather sofa. why? Maybe everyone has a different view on whether to sit well or not. However, comparing leather sofas to cloth sofas and wooden chairs does make the sound more pleasant, especially at low frequencies.

why? I haven't tested it in a scientific way, but I think leather sofas are good sound damping bodies. They can absorb sound (volume, weight and softness) and reflection (leather surface) sound waves moderately, making the sound better. In addition, if the leather sofa is properly maintained, it can be used for five to ten years. Moreover, leather sofas imported from Italy are not too expensive at present, besides there are many Taiwanese imitations.

Thin sheet nails are not allowed, hurting money and hurting sound. In general families, in order to beautify the ceiling, or fake walls and beams, please use woodwork to nail the plywood, or even the entire wall to be beautiful. It is a pity that the splint has a fairly strong absorption effect on the middle frequency and the middle and low frequencies. Therefore, if there are too many splints, the mid and low frequencies will become thinner. Everyone knows that if the intermediate frequency is thin, it is as if the liver is not good. In terms of sound effects, the splint definitely hurts money and hurts the body.

If your ceiling must be beautified, then I suggest you to make small curved plates to beautify. Or, make a piece of independent long sound arc. Even, it can be installed on the ceiling with a secondary remainder diffuser. These measures are positive for sound. Please note that if you have a large space, you can do the above measures on the ceiling of the listening area. If it is within five pings, a few arcs will cover the ceiling. Some people may doubt that arc-shaped plates are also made of thin plates? It is true that it is bent from a thin sheet, but it is very strong. Moreover, there is no closed cavity inside, so the sound absorption characteristics are far less than the normal placement of diffusion furniture. Diffusion absorption naturally comes to mind. When arranging a sound room, the first thing people think of is to be neat and simple. There are no ordinary furniture cabinets in the room. As everyone knows, in this way, because there are few things in the room to absorb sound, it will cause too much echo, too long reverb, and many low-frequency standing waves. A space like this is beautiful and beautiful, but the sound must be empty and noisy and not durable to listen to.

My suggestion is that it is better to have a home environment with a table, chairs, cabinets, etc. in an audio space. These furniture will naturally absorb, reflect, and diffuse sound. If you are lucky, your voice will sound good without effort. Unlucky, let's make some devices and adjustments to make the sound good.

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