Sony SRS-X99 Help Manual page 267

5. Select [SRS-X99] on the AirPlay menu of the iPhone/iPad/iPod touch.
6. Start playing back music on the iPhone/iPad/iPod touch, and adjust the volume.
The selected song will be heard from the speaker.
If playback does not start, perform the process again from step 3.
To enjoy a more dynamic sound
Remove the speaker grille from the front of the speaker with the speaker grille detach tool (supplied).*
*
Keep the removed grille on a flat surface to prevent distortion.
Note
Do not touch the exposed part of the speaker (speaker units) after removing the speaker grille.
Using the speaker or remote control during playback
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