![Bose A30 Aviation Headset - test flight in Cirrus, Aztec, Cessna 172 vs. Bose A20 (Product PIREP) - YouTube Bose A30 Aviation Headset - test flight in Cirrus, Aztec, Cessna 172 vs. Bose A20 (Product PIREP) - YouTube](https://i.ytimg.com/vi/I9tS53mXqp4/maxresdefault.jpg)
Bose A30 Aviation Headset - test flight in Cirrus, Aztec, Cessna 172 vs. Bose A20 (Product PIREP) - YouTube
![This is my grandad's flying headset from when he was a test pilot. I know it's not at actual headphone per say, but I was curious if anyone knew what it terminates This is my grandad's flying headset from when he was a test pilot. I know it's not at actual headphone per say, but I was curious if anyone knew what it terminates](https://preview.redd.it/xlcj2rb02a151.jpg?auto=webp&s=28c0a1906a54221a49da182d641db38d293779de)
This is my grandad's flying headset from when he was a test pilot. I know it's not at actual headphone per say, but I was curious if anyone knew what it terminates
![Bose A30 - das neue ANR-Headset im fliegermagazin-Test. Review - English Subtitles available - YouTube Bose A30 - das neue ANR-Headset im fliegermagazin-Test. Review - English Subtitles available - YouTube](https://i.ytimg.com/vi/fGeMp8IXVWM/maxresdefault.jpg)