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How to use and clean the earplug cap attached to the earphone
If your earplug-in headphones have not yet been fitted with earplug caps, please choose a pair of earplug caps and install them. Then slightly insert the earplug cap into the ear. You can adjust the earplug cap until it feels like it won't fall off.
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07- 30
Tone quality
Low-frequency extension: refers to the lowest frequency that an audio device can reproduce. It is a scale used to determine the extent to which the sound system or speaker can descend during bass playback. For example, a small subwoofer can extend to 40 Hz at low frequencies, while a large subwoofer can dive to 16 Hz.
