Alto Professional Live Drive App - Manual (Page 4)

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Updating the firmware: If there is new
firmware available for any connected Black
Series loudspeakers or subwoofers, Live Drive
will notify you when you first open the app. Tap
the Update Firmware button(s) to update that
loudspeaker's or subwoofer's firmware. During
the process, we recommend not closing the
app and keeping your iOS device within 20 feet
(five meters) of the loudspeakers or subwoofers.