Common failures and solutions of stage audio

Stage audio What are the common faults, this is what we usually need to pay attention to. Only when you understand the problems, can you do a better job and achieve the sound effects. Here are some common faults about audio in this regard.

1. The circuit must be connected according to the standard. The loud noise of common system AC interference is caused by the failure of the line connection process. There are also balanced to unbalanced and unbalanced to balanced connections in the system, which must be connected according to the standard. In addition, do not use inferior connectors.

2. 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.

3. How to deal with bass signals. One is to use the full-frequency signal to directly push the speaker to the power amplifier without doing electronic frequency division, so that there is no sound and the unit will not be burned, but the low-frequency unit can emit full-range sound. Obtaining signals from improper locations in the system will also bring unnecessary trouble to on-site control. Second, I do not know where to extract the bass signal from the system for processing.

4. System level problem. One is that the power amplifier sensitivity control switch is insufficiently turned on, and the other is that the system has not adjusted the zero level. 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. The problem of signal distribution. In the case of 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.

6. Frequency adjustment of equalizer.

7. How to adjust the compressor. Common furnishings don't work at all and over-react. The former can be used, the latter will seriously affect the dynamics of the system, and the performance is that the sound cannot 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.