Power amplifier bottom noise elimination is nothing more than the following points:
1, the power filter capacitor is small or damaged;
2, the floor noise caused by the damage of the volume potentiometer or the floor noise generated when rotating the knob;
3, the front signal line does not use a shielded signal line;
4, poor grounding, grounding is not standardized;
The method of eliminating the strange background noise of the power amplifier: Part1: caused by mechanical noise
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[机] 机械噪声
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Mechanical noise is unique to active speakers. During the operation of the power transformer, the vibration of the iron core caused by the alternating magnetic field will produce mechanical noise, which is very similar to the buzz emitted by the fluorescent lamp ballast. Choosing a good quality product is still the best way to prevent this noise. In addition, we can install a rubber damping layer between the transformer and the fixed plate.