User Manual
Table Of Contents
- About your Bose® A20® Aviation Headset
- Components
- Preparing the Headset for Use11
- The battery compartment
- Connecting the headset to the aircraft
- Wearing and adjusting the headset
- Using the control module
- Primary and secondary audio sources
- AUX audio sources (wired)
- Bluetooth® audio sources (wireless)
- Using the headset with a Bluetooth® device
- Pairing the first device
- Pairing another device
- Switching between connected devices
- Bluetooth multi-function button
- Making and answering calls
- Reconnecting to a previously connected device
- Recovering a lost connection
- Disconnecting a Bluetooth device
- Clearing the headset pairing list
- Controlling Bluetooth volume
- Using the headset with a Bluetooth® device
- Secondary audio modes
- Cleaning the headset
- Instructions for continued airworthiness
- Managing multiple secondary sources
- Ordering parts and accessories
- Contact information
- Limited warranty
- Locating the headset serial number
- Mounting the aircraft panel connector
- Replacing parts
- Microphone windscreen

26 - English
Using the Headset
Managing multiple secondary sources
The headset can connect one AUX (wired) source and up to two Bluetooth
®
( wireless) sources at a time.
If you are likely to receive important information from a particular secondary source
(such as a GPS or a warning system), you can assign priority to that source. This
insures that incoming audio from the priority source will always override other
source.
Setting the Priority (BT-AUX) switch
To assign priority to one of your secondary sources:
1. Locate the Priority (BT-AUX) switch inside the battery compartment.
AUTO OFF
ON - OFF
AUTO ON
ON - OFF
2. Set the switch to the correct source (BT or AUX) as shown below.
When the switch is in the BT
position, the Bluetooth source
will override the AUX source if
a signal is detected.
When the switch is in the AUX
position, the AUX source will
override the Bluetooth source if
a signal is detected.
Bluetooth source
AUX source
Note: Incoming and outgoing phone calls will always override any other
secondary source.