Hello poster, there is actually no need to boil it. Just get it and use it normally. Don’t turn up the volume too high at the beginning (it’s no problem within the range that the human ear can bear). Just listen to whatever songs you usually listen to. Song, after using it for about 50 hours, depending on the specific situation, the sound and quality can basically be brought out.

The burn-in is actually just a process of accelerating the running-in of the original parts and wires. It can be driven continuously for dozens of hours. Of course, the running-in is fast. Some so-called pink noise and white background noise burn-in tracks may damage headphones due to their extreme frequency bands. If you don't pursue this fast speed, natural use is actually the most suitable. Slowly experiencing the process of sound adjustment is a rare experience, both in terms of fun and mastery of sound.

I have used headphones like this with prices ranging from more than 100 yuan to 2,000 to 3,000 yuan, and there is no problem at all. Most of those who have a lot of burn-in theories don't understand headphones and are afraid that others will think they don't understand.

In short, natural use is the best way.

The K420 is just an entry-level dynamic portable headset. It has little value when listening to lossless music. It does not need to be lossless. You can listen to music in whatever format you usually use.