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
Preparing the Headset for Use
12 - English
e battery compartment
The headset is shipped with factory-set operation defaults. If you want to alter
these defaults, you can change the operation switches located inside the control
module battery compartment.
Opening the battery compartment
Press down firmly on the finger indent and slide the cover down. The cover is
tethered to the module. Do not attempt to detach it.
Note: The battery compartment cover is designed to remain securely closed. You
may need to use extra force when pressing down and releasing the cover.
e operation switches
The operation switches control: Priority (BT-AUX); Intercom (MON-ST); Auto On
feature; and Auto Off feature. For details see the table on page 12.
• The Auto On feature is only
available for aircraft powered
versions.
• The Intercom (MON-ST)
option is only available for
headset configurations that
support two-channel or
stereo intercom systems.
• The Priority (BT-AUX)
option is only available for
Bluetooth headsets.
AUTO OFF
ON - OFF
AUTO ON
ON - OFF
AUTO OFF
ON - OFF
AUTO ON
ON - OFF
Changing the operation switches
1. Open the battery compartment.
2. If batteries are installed, remove them. In the battery compartment, you can
observe and change the switch positions.
3. To change a switch position, use a pen or a small, flat-tipped screwdriver to
gently move the switch.