Full range speaker:
Low-quality full-range speakers generally have high-pitched sounds and low-frequency noise. When using equalizer processing, for medium-high frequency, reduce the frequency to 5K as the center frequency, cover the 3K-6K frequency band, and do some attenuation to make the middle and high frequency softer. Some, if the high frequency band has an irritating "silk" sound, similar to the excessively strong tooth sound, you can do a little attenuation of 8-10K. The high-frequency upper limit of the low-priced products will not be very high. If the 12-14K is raised at the high-frequency end, it will produce an irritating feeling. If there is no obvious effect if the increase is above 14K, the frequency band above 14-16K can be cut off. It is cleaner.
If the low-frequency part is scattered and the sound is blurred, first use the equalizer to cut off the frequency band below 60 or even 100 Hz, which can make the bass slightly tightened and become a little bit. In addition, affecting the low-frequency definition often see two frequency bands, one is about 250 Hz, mainly reflected in the singing, the throat sound is not clear, there is a feeling of empty, this frequency band is attenuated a bit, can make the low-frequency and clean. Another frequency band that is easy to cause unclean sound is 400-600 Hz, which is mainly reflected in the turbidity. Appropriate attenuation can make the IF sound refresh.
Subwoofer:
Low-quality subwoofers often have two main manifestations, one is turbid, unclear, divergent, and intensive. The other is that the sound is harder, more rushing, and less flexible.
For the first case, first of all, do not consider the extension of the low-frequency lower limit. Although the unnecessary low-frequency lower end is cut off, the equalizer can be used to pull from 20 Hz to low, and sometimes it can be pulled to 60 Hz. The purpose of this is to First tighten the low frequency limit, unnecessary low frequency end signal will slow down the low frequency speed, let the low frequency become drag and drop. After tightening, I feel a little bit more. If there is some squeaky sound after tightening, it is generally necessary to reduce the 63 Hz by a little more. This will make the low frequency sound refreshing and also reduce the room resonance caused by the low frequency. After such a treatment, the low frequency sound will obviously become clean. Due to the more attenuation, the overall level will be reduced. In this case, just increase the output level of the divider a little.
For the second case, the difficulty of debugging will be smaller, the sound is hard, generally the high-end of the low-frequency is more prominent. When the crossover point is set to about 150 Hz, it is generally reflected in the frequency band of 125-160 Hz. Attenuation of the two frequency bands can significantly reduce the feeling of low frequency hard and impact on the human chest. If the elasticity is insufficient, it is more difficult to handle. With the increase of 50 Hz, you can increase some flexibility, but it is relatively dangerous. Because the energy of this frequency band is very sufficient, it is easy to burn the horn, 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 speaker products with lower quality, when using the equalizer to process the sound, try to use less means to upgrade certain frequency bands, because this will allow the speaker unit to accept a large amount of electric power in the elevated frequency band, resulting in the unit Distortion or damage. The use of attenuation means attenuating the excess components, which in turn allows some of the masked details to be reflected.
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