In fact, when you start joining the audio industry, the audio equipment you purchase is often used and there will be no power phase issues. Reversal only occurs when the connection is incorrect or the wrong adapter is used, usually not. So don't worry about the new video player. But when you talk about power cords, too many power cords in the market are from the United States. The electrical standard we are currently using is from the UK. Regardless of whether there is a real difference in connectors between the United States and the United Kingdom, the power cord for Foshan audio equipment is also divided into ground wire, water wire, and live wire. Errors are usually caused by self replacement or incorrect DIY power cord.

My mistake was many years ago, when I was one, I wanted to copy someone else, replace my wall plug with an American wall plug, and then switch to an American power cord. As a result, I mistakenly connected the water and fire wires in the wrong position, resulting in a phase error in the power supply.

If N and L are wrong, because the sound line is alternating current, it can still be energized to produce sound. In the understanding of some electricians, even if the problem is small, there should not be a huge difference in sound. However, the author and many enthusiasts have attempted to demonstrate the difference and significant impact between the two. Brother changed a lot of different equipment and wasted some equipment and money because the power phase was incorrect, so there was no problem. Finally, he raised the issue of the power phase during a visit to an elderly person's home and found and resolved the issue

This sounds strange when your power supply has an incorrect phase connection. After pushing away the sound field, the feeling and coherence of the music are very strange. The string loses its luster, and the sound feels more concentrated but not open.

Anyway, checking speed is just a rule of thumb, especially when you switch the DIY power cord or worker to a power wall or electric mop, as long as the power phase is correct, your input and sound will play correctly.