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How to adjust low-quality speakers?

2021-04-25 77
At present, there are still many low-quality audio products on the market, and they are widely used in a large number of low-cost projects. Recently, I have helped some friends adjust a few places, most of which use cheaper products. After careful adjustment, the overall effect is Improved, now introduce the experience.

Full-range speakers:
Low-quality full-range speakers generally have relatively noisy mid-range and high-range frequencies, while low frequencies are relatively loose. When using an equalizer, reduce the center frequency of 5K to cover the frequency band of 3K-6K. Do some attenuation to make the mid-range and high-range frequencies softer. Some, if there is an annoying "silk" sound in the high frequency band, similar to a strong tooth tone, you can do a little attenuation to 8-10K. The high-frequency upper limit of low-priced products will not be very high. If you increase 12-14K at the high-frequency end, it will produce annoying feeling. If you increase the frequency above 14K, there is no obvious effect. You can simply cut off the frequency band above 14-16K. It's cleaner.

If the low frequency part feels scattered and the sound is fuzzy, first use an equalizer to cut off the frequency band below 60 or even 100 Hz, which can tighten the bass slightly and become more crisp. In addition, two frequency bands are often seen that affect low-frequency clarity, one is about 250 Hz, which is mainly reflected in the unclear throat sound when singing, and there is a feeling of hollowness. Attenuating this frequency band a bit can make the middle and low frequencies cleaner. There is also a frequency band that easily causes unclean sound to be 400-600 Hz, which is mainly reflected in the sense of turbidity. Appropriate attenuation can make the mid-frequency sound refreshed.


How to adjust low-quality speakers?


Subwoofer:
Low-quality subwoofer speakers often have two main performances, one is the sound is muddy, unclear, divergent, and not concentrated. The other is that the sound is hard, punchy, and lacking in elasticity.

For one situation, first do not consider the extension of the lower limit of the low frequency. Although the unnecessary lower end of the low frequency is cut off, you can use the equalizer to start from 20 Hz to lower one by one, and sometimes it can be pulled to 60 Hz. The purpose of this move is to first Tighten the lower limit of low frequency, unnecessary low frequency end signal will slow down the speed of low frequency, making the low frequency become dragged. After tightening, it feels more crisp. If there is still some buzzing sound after tightening, it is generally necessary to reduce the 63 Hz appropriately. This can make the low-frequency sound refreshed, and it can also reduce the room resonance sound caused by the low-frequency. After such a process, the low-frequency sound will become significantly cleaner. Due to more attenuation, the overall level will be reduced. At this time, just increase the output level of the frequency divider appropriately.

For the second case, the difficulty of debugging will be less, the sound is hard, and the high quality of the low frequency is generally more prominent. When the crossover point is set to about 150 Hz, it is generally reflected in the 125-160 Hz frequency band. Attenuation of these two frequency bands can significantly reduce the low-frequency hard and impact the human chest feeling. If the flexibility is not enough, it will be more difficult to deal with it. Using a 50 Hz boost can increase some flexibility, but it is relatively dangerous because the energy in this frequency band is sufficient, which may cause the speaker to burn, so use it with caution!

The above is a personal experience, friends can refer to it, in the specific debugging process, not necessarily stick to what I said, you can adjust the frequency band near the equalizer, try to find the most accurate position and attenuation the size of. In addition, for low-quality speaker products, when using the equalizer to process the sound, try to minimize the use of methods to increase certain frequency bands, because this will allow the speaker unit to accept a large amount of electric power in the increased frequency band, resulting in unit damage Distorted or damaged. The use of attenuation means to attenuate the excess components, which in turn allows some of the details that have been masked to be reflected.
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