14. Is FH7 required to burned in?
A: Because of the working principle and characteristics of the ear unit's speaker, the speaker diaphragm can be in the best working state after the new earphones are burned in for about 200 hours.
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A: Because of the working principle and characteristics of the ear unit's speaker, the speaker diaphragm can be in the best working state after the new earphones are burned in for about 200 hours.
