Bose A20 Wiring Diagram | Free Wiring Diagram Collection of bose a20 wiring diagram. A wiring diagram is a streamlined conventional pictorial depiction of an electrical circuit. It reveals the parts of the circuit as simplified shapes, and the power and signal connections between the tools. A20 Aviation Headset - Bose Product Support Discover product support for your A20 Aviation Headset. Learn how to operate your product through helpful tips, technical support info and product manuals. A20 Aviation Headset - Bose Product Support Aviation Headset - Bose Corporation PDF fileIntroduction 6 - English About your Bose® A20® Aviation Headset With the Bose® A20® Aviation Headset, you can rely on crisp, clear audio and significant noise reduction for all cockpit communications. You can also connect the headset to secondary audio sources such as smartphones or tablets.