When purchasing, pay attention to the labeling of product performance indicators and the quality of product workmanship.
1. Pay attention to the labeling of product performance indicators
When buying earphones, pay attention to the performance indicators on the earphone packaging or manuals, because poor-quality earphones are often produced by some small factories, and some of their performance indicators are arbitrarily marked, and some are exaggerated. Headphones generally have a low frequency range of 20-20kHz, a power greater than 100mW, and a harmonic distortion less than or slightly equal to 0.5%. If the above requirements are not met, you are better not to buy. Don’t buy a product whose performance is too high in the manual if it is better.
2. The quality of product workmanship
The more authentic earphones produced by major manufacturers usually use engineering plastics, so they have a very smooth appearance, and have a certain degree of stress and toughness; they have no harshness, fine workmanship, and no roughness of inferior plastics. In addition, the lead wire diameter of the earphone is relatively thick, which can ensure stable transmission, and the wire feels soft and hard; the plug is made clean and neat, without leaving burrs, and the coating is smooth and even. If it does not meet the above conditions, it is better not to buy.