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

English - 5
Contents
Introduction ......................................................................................... 7
About your Bose
®
A20
®
Aviation Headset ...........................................................................7
Our commitment to you .........................................................................................................7
What’s included ........................................................................................................................7
Components ............................................................................................................................ 8
Control module variations ............................................................................................ 9
Power and cable variations .........................................................................................10
Preparing the Headset for Use ......................................................... 11
e microphone assembly .................................................................................................... 11
Attaching the microphone assembly ......................................................................... 11
e battery compartment ................................................................................................... 12
Opening the battery compartment ........................................................................... 12
e operation switches ................................................................................................ 12
Changing the operation switches .............................................................................. 12
Auto On .....................................................................................................................13
Auto Off .................................................................................................................... 13
Inserting and replacing the batteries ........................................................................ 14
Connecting the headset to the aircraft ............................................................................. 14
Using the 6-pin plug .....................................................................................................14
Using the dual general aviation plugs.......................................................................15
Using other plug types ................................................................................................. 15
Preparing the Headset for Use ......................................................... 16
Wearing and adjusting the headset ...................................................................................16
Conditions related to fit ...............................................................................................16
Microphone placement ................................................................................................ 17
Clothing clips ................................................................................................................. 17
Using the control module ....................................................................................................18
Power button .................................................................................................................18
Power indicator ..............................................................................................................19
Intercom volume controls ...........................................................................................19
Primary and secondary audio sources .............................................................................20
AUX audio sources (wired) ..................................................................................................20
Bluetooth
®
audio sources (wireless) ................................................................................. 20
Using the headset with a Bluetooth
®
device ............................................................ 21
Pairing the first device ........................................................................................... 21
Pairing another device .......................................................................................... 22
Switching between connected devices.............................................................. 22
Bluetooth multi-function button ........................................................................ 22
Making and answering calls ................................................................................23
Reconnecting to a previously connected device ..............................................24