Connecting to LE Audio-compatible Bluetooth devices
The earbuds support LE Audio. Enable the LE Audio function with the Denon Headphones app to connect.
Pair the LE Audio-compatible Bluetooth device with the earbuds.
For pairing methods, see Connecting to the earbuds for the first timelink or Pairing with other Bluetooth deviceslink.
Connect the earbuds to the Denon Headphones app and enable “Settings” - “LE Audio”.
Delete the connection history for “Denon AH-C840NCW” in the Bluetooth device's connection settings.
Place the earbuds in the case.
With the lid of the charging case open, long press the multi-function button for approximately 2 seconds.
If the LED on the charging case is slowly flashing in white, the earbuds are in the pairing mode.
Make sure the Bluetooth function on the Bluetooth device is turned on, and select “Denon AH-C840NCW” from the list of devices displayed on the Bluetooth device screen.
Pairing will be completed.
To connect with LE Audio, settings may be required on the LE Audio-compatible Bluetooth device. For example, if there is an LE Audio switch in the Bluetooth device's connection settings, make sure it is turned on. For details, see the owner's manual of the Bluetooth device.
When the earbuds' LE Audio function is enabled, Swift Pair is not available. Connect the earbuds using the connection settings of the Bluetooth device.
When LE Audio is connected, the voice assistant is not available even if it is assigned to the touch sensor.
If you change the LE Audio setting from enabled to disabled, you will also need to delete the connection history on the Bluetooth device. To reconnect, follow steps 3 to 6.
Even with LE Audio-compatible devices, connection and operation may be unstable depending on the device. In this case, disable the LE Audio setting in the Denon Headphones app or restore the earbuds to their factory settings. link