Insufficient sound thin, while excessive sound will enhance nausea, mixer, bright decreased, nasal enhanced. Alto: 500 Hz ~ 2 KHz appropriate, thorough bright sound. Insufficient hazy sound, YAMAHA most professional mixer, the phone will have a similar sound overly exaggerated. Treble: 2 KHz ~ 8 KHz affect the frequency of the sound layering. Penetrating sound of insufficient decline, would cover too strong recognition language syllable, the teeth tone heavier, sound scared. Some consoles are four equalizer, mixer types and functions, some will take IF sweep knob. To turn a small gain when using high level input. Gain knob as a sound mixer input gateway, properly adjusted, it can ensure that the audience tuning processing circuit level can receive adequate and "clean" signal. 6.HIGH, MIDDLE, LOW: three-band equalizer knobs High, Middle, Low, respectively, can be high, medium, low frequency boost or cut, the control range is plus or minus 15 dB. IF control is particularly useful when the sound of income, can be very accurately modified performer's voice. Bass: 20 Hz ~ 500 Hz, when appropriate, proper relaxation bass sound plump and soft. Digital and analog mixer, Wuhan audio equipment (certified), the mixer provided by Wuhan Engineering Co., Ltd. Jiuhua video. Video Jiuhua Wuhan Engineering Co., Ltd. (www.jowa-tech.com) is a leader in Wuhan, control and adjustment of the equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Jiuhua video in Wuhan leadership with the staff warmly welcome all inquiries negotiations to create video Jiuhua Wuhan better future.