When purchasing headphones, the performance indicators of the earphone packaging or the manual should be noted, because the poor quality headphones are often produced by some small factories, and its performance indicators are random labels, and some are exaggerated. Headphones generally have to reach a frequency range of 20 to 20 kHz, a power greater than 100 mW, less than or slightly equal to 0.5% of harmonic distortion. If you do not meet the above requirements, you should not buy. If the product with too high performance in the manual is too high, don't buy it.
Folding product quality
The more authentic earphones produced by large manufacturers usually use engineering plastics, so the appearance is very smooth, and there is a certain degree of stress and toughness; it has no hard feeling, the workmanship is fine, the hand feel is very good, and the roughness of inferior plastic is not used. sense. In addition, the lead wire diameter of the earphone is relatively thick, which can ensure stable transmission, and the touch of the wire is soft and hard; the plug is made neat and clean, no burrs are left, and the plating layer is smooth and uniform. If you do not meet the above conditions, do not buy.