Sony SRS-HG1 Help Manual page 74

Play back music on the PC.
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For details, refer to the operating instructions of your PC.
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.
Related Topic
Connecting a PC/Installing the driver
Connecting an Xperia compatible with High-Resolution Audio formats
Connecting a Walkman compatible with High-Resolution Audio formats
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