Guide: 31-band equalizer is one of the necessary functions on the mixer. Professional tuners can adjust the electrical signals of various frequencies to compensate speakers and sound fields in the face of noisy music events. Defects, compensation and modification of various sound sources and other special effects.

Subwoofer: 20Hz-40Hz, with strong and powerful sound when appropriate. Able to control thunder, bass drum, pipe organ and bass sounds. Excessive lifting can make the music muddy.

Bass: 40Hz-150Hz, is the basic part of the sound, and its energy accounts for 70% of the entire audio energy, and is an important component for expressing music style. When appropriate, the bass is relaxed properly, the sound is full and soft, and the sound is thin at 150Hz. When it is excessively raised, it will make the sound dull, the brightness will decrease, and the nasal sound will increase.

Mid bass: 150Hz-500Hz, is the structural part of the sound. The human voice is located at this position. When it is insufficient, the singing sound will be overwhelmed by music. When the boost is too high, the bass will become stiff, and the boost at 300Hz will increase 3-6dB. If reverberation is added, it will seriously affect the clarity of the sound.

Middle: 500Hz-2KHz, including the low harmonics and overtones of most instruments, is the characteristic tone of snare drums and percussion instruments. When appropriate, the sound is clear and bright, and when it is insufficient, the sound is hazy. Excessive lift produces a phone-like sound.

Middle and treble: 2KHz-5KHz, it is the characteristic sound of string music (the sound of bow and string pulling of strings, the sound of fingers touching the strings when playing). When it is insufficient, the penetrating power of the sound decreases, and when it is too strong, the recognition of speech syllables is masked.

Treble: 7KHz-8KHz, is the frequency that affects the sense of layering of the sound. Excessive lifting will make piccolo and flute sounds prominent, accentuate the tooth sounds of the language, and make the tone fluffy.

Extremely high pitch: 8KHz-20KHz, when appropriate, the triangle metal and the vertical metal permeability is high, the rhythm of the sand clock is clear and legible. Excessive lifting will make the sound unnatural and easily burn out the high-frequency unit.

Balanced and pleasant sound: Below 150Hz (bass) should be plump, soft and flexible. 150Hz-500Hz (mid-bass) should be thick and powerful without turbidity; 500Hz-5KHz (mid-to-high tone) should be bright and transparent without being stiff; above 5KHz (Treble) should be slender, round and not sharp.

When the whole frequency response characteristics are flat: the sound is naturally full and flexible, and the levels are clear and pleasant. When the frequency response is multi-peak and valley: the sound is rough and turbid, the treble is harsh and hairy, and the non-layered sound reinforcement is prone to feedback howling.

Frequency characteristics:

30 ~ 60Hz It is difficult for human ears to feel dull without considerable loudness.

60 ~ 100Hz Heavy 80Hz can produce a strong “heavy feeling” effect, high loudness will not give people a comfortable feeling, can give people a strong stimulating effect.

100 ~ 200Hz fullness.

200 ~ 500Hz intensity can easily cause the humming boring mood. 500 ~ 1KHz is clear.

An increase of 10dB near 800Hz will obviously produce a sense of noise and narrowness.

1K ~ 2KHz translucent near 2800Kz has the most bright relationship. 2K ~ 4Kz The sharp 6800Hz forms a shrill, sharp feeling. 4K ~ 8Kz crisp 3400Hz easily cause hearing fatigue.

8K ~ 16Kz Slim> 7.5KHz The sound is clear and slender.

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