Explanation of the graphic equalizer in the sound system

The graphic equalizer, also known as the chart equalizer, can intuitively reflect the adjusted equalization compensation curve through the distribution of push-pull keys on the panel. The lifting equalizer and attenuation of each frequency are clear at a glance. It uses a constant Q-value technique, each There is a push-pull potentiometer at the frequency point, and the frequency bandwidth of the filter is always the same whether the frequency is boosted or attenuated. The commonly used professional graphic equalizer is to adjust the signal of 20Hz-20kHz into 10 segments, 15 segments, 27 segments and 31 segments. Now some basic common sense of the equalizer is explained.

1. The purpose of using the graphic equalizer in the sound system
Already have the basic sound system of the mainframe-amplifier-speaker. In order to improve the sound quality and finer adjustment of the system and make the music play more complete, it is necessary to add an equalizer to the sound system.
The Graphic Equalizer (GraphicEqualizer) can be used to enhance or attenuate certain frequency bands in the audio system. The original intention is to correct the noise characteristics of the interior space and the amplitude and frequency characteristics of the speakers, or to polish the sound. It can adjust the sound field in the car and adjust the front, back, left and right to suit personal hobbies and enhance the sense of the scene.

A frequency equalization circuit, which is a network circuit for correcting certain signals or adjusting transmission frequency characteristics in order to obtain a flat total frequency response in an acoustic system, which can be treated differently for various frequencies, thereby obtaining Flat total frequency response. The internal itself has a 11. segment graphic equalizer circuit, which is a typical example, as well as a host internal amplification circuit, etc., also have different frequency equalization circuits.

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2. Do you want to use the equalizer graphic equalizer in the sound system?

The graphic equalizer has become a must-have component of the audio combination, but it has disappeared in the past few years, and almost no one cares. The reasons are manifold. Firstly, most of the graphic equalizers are of poor quality, and the playback sound will have discernible additional distortion and noise, which will reduce the overall sound quality. Secondly, if used improperly, the balance of the playback sound is often destroyed, causing the playback sound to be excessively low and turbid, the intermediate frequency is lacking and dull, and the high frequency is excessive and harsh. These are not tolerable for fans who are looking for HiFi sound quality.

Now with the popularity of audio, the improvement of knowledge, the sound quality has a good ability to distinguish, the graphic equalizer is gradually applied to the Hi-Fi stage by car audio enthusiasts.

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The equalizer gives a beautiful feeling on the outside, which is the goal that young people like to pursue. Most of the screens are beautiful and the host with the graphic equalizer is selected. The 2DIN mainframes now come with a graphic equalizer. However, it is recommended for Hi-Fi enthusiasts not to use such a host, because such a host internally modifies the sound source, so it is possible to listen to the listener who does not pursue sound quality.
3, how to use the equalizer for sound effects compensation In recent years, many brands of car audio host such as: SONY, KENWOOD, VDOdayton, in order to obtain the comfort of listening, set up some frequency compensation processing EQ can produce special effects, preset more The tuning mode creates a sound effect suitable for playing different music, providing a perfect sound environment. In time, non-professionals will not disturb the sound field. Just press the preset button to achieve the preset effect. Such as ROCK (rock and roll), VOCAL (vocal) CLUB
(club), NEWAGE (avant-garde), POP (pop music), JAZZ (jazz), CLASSIC (classical music), etc. The principle of frequency compensation for the sound source is that it cannot affect the loudness of the melody performance, and even if the volume is large, it is not uncomfortable. Combine the perfect environment for your personal preferences.
4. What are the consequences of improper frequency compensation? When peaks and valleys appear in a certain frequency band of the frequency response, especially at 50-100 kHz and 100-300 Hz, the sound quality will be significantly changed. When there is a peak in the low frequency band and the low frequency band of the frequency response curve, the tone will be turbid, and even a "beep" sound of a specific frequency will appear. When the peak appears in the middle and high frequency bands, there will be a "metal sound", and when the peak appears in the high frequency band, there will be "咝" sound.
The low frequency band has a great influence on the sound intensity, and the excessive sound makes the sound turbid. When it is serious, a "click" sound appears. The medium and low frequency bands of 200 to 500 Hz determine the sound intensity, too much sound becomes blurred, the sharpness decreases, and the fall makes the sound lack of strength and is thin, and the sound is hard and narrow.

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The mid-to-high frequency band plays an important role in brightness, sharpness and presence. Too much sound in this band will make the sound harder. If it exceeds +5~10dB, metal sound will appear. The drop will make the tone lose its brightness, and the serious drop will make the sound boring. Clear. The frequency band above 5 kHz is a reflection of the sound characteristics. For example, the high-frequency 6 to 7 kHz adjustment excessive sound becomes sharp and harsh, and the tooth sound in the language is severe, and the sound makes the tone darker. The equalizer can compensate the frequency response to make a certain frequency increase or decrease, but if it is used improperly, it will cause the sound quality to deteriorate, such as turbidity - excessive frequency increase below 500Hz; boring, no light - excessive frequency attenuation above 2000Hz , or the frequency below 2000Hz is too much; burr--5000Hz or higher frequency over-exertion; thin--500Hz below frequency attenuation too much; lack of presence--1000~4000Hz frequency band attenuation too much; dry, hard--1000～3500Hz frequency band Excessive promotion.
5, frequency equalizer types

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1) Understand the frequency equalizer by performance: analog / digital.
2) According to the method of use, it is divided into: external equalizer, size 11-band graphic equalizer with 3) color spectrum analyzer. Band diagram/2-band parametric equalizer, 3-band equalizer,
4) KICKERKQ3030 band equalizer, this equalizer is generally used for competition.
The host comes with an equalizer such as
1) Kenwood DPX-6020 digital signal processor with equalizer and spectrum analyzer, 11 preset sound field control (SFC), digital frequency division and digital time adjustment.
2) Seven built-in equalizers, sound spectrum analysis display. The power amplifier comes with an equalizer such as a power amplifier with a five-segment graphic equalizer. To use the equalizer is to have a certain process, to explore the experience in the process of use, I believe that you will be inseparable after using it, it will bring you a new feeling.

About Xing Haorui

Shenzhen Xinghaorui Technology Co., Ltd. mainly produces and sells home theaters, stage audio, digital power amplifiers, mobile audio, small appliances and other products. The company has an independent research and development team, first-class management staff, advanced production equipment and superior factory environment! After years of development, it has grown into a large-scale audio company in the industry. Its products are exported to the United States, Canada, France, Brazil, Argentina, Venezuela, Chile, Egypt and other countries and the Middle East and Southeast Asia.

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