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Solutions to power noise of audio equipment system

The selection of equipment should not only look at the indicators, but also consider the actual situation of low improvement.

2021-11-23

Solve the corresponding measures

1. The selection of equipment should not only look at the indicators, but also consider the actual situation of low improvement.

2. The metal shells of all equipment in the system must be grounded, and "one point grounding" must be implemented. That is, the grounding wire must be star-shaped, and chain connection must not be used.

3. The audio equipment system should avoid sharing the same power source with the lighting system. When the equipment capacity is not very large, the three-phase power supply can allocate one phase to the audio and two phases to the light. Otherwise, a dedicated line should be directly allocated to the audio equipment system from the power distribution room. In addition, all audio cables are far away from lighting wiring, especially the wiring on the light rack.

4. When choosing dimming equipment, you should choose a new generation of equipment and avoid choosing old-style thyristor dimming equipment, because old-style dimming equipment will seriously deteriorate the power waveform and fill the space with malignant clutter radiation. 5. Insert the noise suppressor after the system equalizer and before the main amplifier. This is very effective for suppressing the basic noise of audio equipment, but is basically ineffective for switching noise, because the switching noise level is usually quite high.

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