Sony SRS-HG1 Help Manual page 184

To enjoy a more dynamic sound
Pull the lever on the bottom of the speaker in the direction of the arrow shown in the illustration below to remove the grille.
* After removing the speaker grille, do not touch the exposed part of the speaker (speaker units), and keep the removed grille on a flat surface to prevent
distortion.
Note
The speaker supports only audio playback functions of Walkman.
Sony is not responsible for loss or damage of data in a Walkman that is connected to the speaker.
Correct operation is not guaranteed, even for a supported Walkman.
Depending on the Walkman, dynamic normalizer, equalizer, VPT, DSEE HX and speaker output optimizer may be set to on (or adjusted). If the
sound is distorted, set these functions to off.
When the Walkman is connected, sound is not output from its headphone jack.
Related Topic
About High-Resolution Audio format files
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