1. The problem of signal distribution: When there are several groups of speakers in the sound field, an equalizer is often used to distribute the signal to multiple power amplifiers to drive the speakers. But at the same time, it is also possible that different brands and models of amplifiers and speakers are used together, so that the distribution signal brings many problems, whether the impedance is matched, whether the level distribution is balanced, whether the power obtained by the speakers is normal, and it is difficult to adjust with a balanced Frequency characteristics of sound field and speakers. 2. The problem of frequency adjustment of the graphic equalizer: There are three types of spectrum waveforms, such as swallow-shaped peak-shaped waves. The above waveforms are all artificially imagined by the tuner. The ideal sound field frequency characteristic curve should be relatively flat. If one adjusts the sound field frequency characteristic curve based on imagination, one can imagine that the result is counterproductive. 3. Compressor adjustment problem: It is common that the decoration does not work at all and the effect is excessive. The former can be used, the latter will seriously affect the dynamics of the system, which is manifested as the sound can not be produced. The obvious performance is that the stronger the accompaniment sound, the vocal will naturally weaken and the singer will be at a loss. 4. System level problem: First, the power amplifier sensitivity control switch is not turned on enough, and secondly, the system does not make zero level adjustment. Sometimes the output of the mixer channel pushes a little bit is already very large, this situation will affect the dynamics and distortion of the system. 5. Bass signal processing: the first kind does not do electronic frequency division and uses the full-frequency signal to directly drive the speaker to the power amplifier; the second kind does not know where to extract the bass signal from the system for processing. If you don't do electronic frequency division, use full-frequency signals to directly drive the amplifier to the amplifier. Although the speaker has sound and the unit will not be burned, it can be imagined that the lower unit sends full-frequency sounds; It will also bring unnecessary trouble to the on-site control. 6. Effect loop processing: the post-signal of the fader should be taken to avoid microphone whistle caused by uncontrolled effects, and return to conditionally occupy one channel, so debugging is more convenient. 7. Line connection process: The loud noise of common system AC interference is caused by the line connection process not being done well, and the system with balanced to unbalanced and unbalanced to balanced connection must be connected according to the standard. In addition, do not use inferior connectors. 8. Control problem: The mixer is the control center of the system. Sometimes the high, medium and low EQ balances on the mixer are boosted or attenuated by the same large degree, which means that the system has not been adjusted well, and the system needs to be debugged again. Taiwan's EQ. Cadillac Dash Cam,Wireless Dash Cam Front And Back,Front And Rear View Dash Cam,Dash Cam Front SHENZHEN ROSOTO TECHNOLOGY CO., LTD. , https://www.rdtkdashcam.com