Boiling machine (bāo jīι) is a measure to quickly age and stabilize the equipment. Some components, such as transistors, integrated circuits, and capacitors, are unstable when they are brand new, and can gradually stabilize after a period of use.
What does it mean that the boiler is also called earphone, speaker and machine?
Cooking machine? It means that the stability of sound quality needs a period of use. If you listen to 1 hour every day, it will take about 4 or 5 months for the sound to basically stabilize. So these four or five months are? Cooking machine? Period. Proper cooking will not damage headphones, but will only accelerate the stability of sound quality. Used here? Stable? This word, isn't it? Improve? Some headphones (speakers) are not necessarily better than brand new ones.