1.6mm thick double-layer circuit board, RF-4 dense glass fiber material, smooth surface, high mechanical strength, heat and moisture resistance, not easy to crack in the section, high dielectric properties, good sound quality will be outstanding when the material is good. The layout of the circuit board is beautiful, the components are selected, and the chip technology is adopt. Each plug-in is professionally hand-solder, and the process is perform without the flaw technology of the workshop.

Generally, the power supply and the power amplifier should be kept at a certain distance to avoid electromagnetic interference. It is best to use a high-quality power supply, and the power supply will be more stable. If a power supply such as a transformer is use, in order to prevent electromagnetic interference, it is best to cover the transformer with an iron cover. Following are common problem:

1. The power supply is unstable, or the power supply module produces interference

2. The impact of using a switching power supply as a power supply

3. Use a transformer for power supply without shielding and isolation to avoid interference

4. There is electromagnetic interference in the use environment

5. There is a problem with the audio input device itself

Software problem en.wikipedia.org

Audio driver settings affect and player special effects

Each power amplifier chip has its own unique sound field. If the sound card driver or playback software is set with sound effects, it will directly affect the sound quality of the power amplifier board. The simulation effects of some special effects software may also cause distortion of the power amplifier. It is recommend to turn off the relevant special effects software or sound card driver special effect settings when connecting to a mobile phone and computer, and then use the special effects after ensuring that the output effect of the power amplifier is not affect.