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Knowledge on Stage Lighting and Sound Equipment Inspection

Exhibition News 2025-11-06

The normality of stage audio and lighting directly affects the performance effect, so both professional audio equipment and stage lighting equipment need to be well maintained and serviced. Any faulty circuits and equipment should be repaired in a timely manner to avoid unexpected situations.

1. Inspection sequence for live phenomenon on the shell of stage audio and lighting equipment

The sequence of live inspection of equipment casing is first to check whether the power supply line is damaged, followed by whether the phase of the line is correct, and then to understand whether the equipment grounding and voltage are correct.

2. Inspection sequence for insufficient volume in professional audio systems

In general, if there is insufficient volume in professional audio equipment, it is necessary to promptly check whether the line level settings of the amplifier and speaker are correct. Secondly, it is also necessary to understand whether the speaker line connection is firm, whether the phase of the amplifier and speaker is consistent, whether the equalizer attenuation is within the normal range, and whether the starting level of the voltage limiter is appropriate.

3. How to check for resonance and feedback in the sound field

If resonance and acoustic feedback occur in professional audio equipment, the first step is to check whether there are peaks in the room's frequency response, whether the room structure and decoration are reasonable, and whether the frequency division point and bass gain are reasonable, as well as whether the room's reverberation time is too long.

4. Inspection method for generating interference noise

If there is noise in professional audio equipment, the first step is to check for dimming interference and whether the audio and lighting power supplies are disconnected. Secondly, check whether the lighting power supply and control circuit are too close to the audio signal line, and whether there is a situation where the silicon box is too close to the audio equipment. In general, when there is noise in the speaker system, it is usually caused by unreasonable signal transmission. Therefore, when there is a problem with the shielding of the signal line or incorrect signal grounding, it is easy to encounter noise interference

5. Inspection method for uncontrolled lighting

If the lighting is out of control, the first thing to check is whether there is a problem with the controller's program, whether there is a problem with the address code of the lighting fixture, whether the connection of the control line is correct, and whether the shielding of the control line has been affected by any adverse interference. It is also necessary to check whether the limit adjustment of the lighting fixture is appropriate.

6. Computer light bulb damage inspection

One common issue in stage audio lighting is that light bulbs are prone to breakage. Therefore, when problems arise, it is necessary to check whether the installed light bulbs are secure, whether they are contaminated with dust and moisture, whether the heat dissipation of the light bulbs is within the normal range, whether the voltage is within the normal range, and whether the power switch is used too frequently.

7. Inspection of video images in audio and video systems

If abnormal video images occur in professional audio equipment, the first step is to check whether the program format is within the correct range, whether the equipment casing is charged, and whether the signal shielding is easily affected by high-level interference. It is also necessary to check whether the projection tube is within the normal range and whether there are any problems with the performance of the LCD projection light bulb.

8. The sound of wireless microphones in professional audio equipment is unstable

If the wireless microphone is unstable, the first thing to check is where the cause of the unstable sound is. Is it due to high-frequency interference sources in the system, or is it caused by incorrect antenna connections, receiver fine-tuning, microphone battery levels, and other connection equipment problems.

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