Sony SRS-X11 Help Manual page 56

The speaker can be paired with multiple devices, but can only play music from one paired device at a time.
When an audio cable is connected to the speaker's AUDIO IN jack while the speaker and the BLUETOOTH device
have been connected via BLUETOOTH connection, sound from the BLUETOOTH-connected device is not output from
the speaker (the hands-free function is available). To listen to music from the BLUETOOTH device, disconnect the
audio cable from the speaker's AUDIO IN jack.
Related Topic
Connecting with a paired BLUETOOTH device
Listening to music of a device via BLUETOOTH connection
Terminating the BLUETOOTH connection (After use)
Listening to music wirelessly with two speakers (Speaker add function)
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