Bose A20 Aviation 2015-present Owner's guide - Page 19

Using the Headset Primary and secondary audio sources The aircraft intercom system (ICS) is always the headset's primary audio source. When the headset is plugged in to the aircraft, intercom signals will always be heard and cannot be muted by the headset. In addition to the primary source (intercom), the headset can connect to secondary audio sources. Secondary sources can be either AUX (wired) or Bluetooth® (wireless). Note: Only one secondary source can be heard at a time. Audio from a secondary source will never override intercom communications. AUX audio sources (wired) Use the 1/8 inch (3.5 mm) AUX audio input to connect your headset with an external audio source such as a portable GPS or a portable audio device. The connector is located at the bottom end of the control module as shown. Use the supplied 1/8 inch (3.5 mm) adapter cable to connect your external audio device. Plug one end of the adapter cable into the headphone plug on your device and the opposite end into the headset AUX audio input. AUX audio input Note: None of the functions of a connected AUX source are controlled by the control module. Note: Audio from an AUX source will not be heard if the Secondary Audio Mode selector is in the OFF position. Bluetooth® audio sources (wireless) If you purchased the Bluetooth control module version, you can wirelessly connect your headset to an external audio source such as a smartphone or tablet. English - 19