when I upgrade from the Bose A10 to the A20
I started the engine on the SR20, saw the prop moving but missed the engine noise which you do hear when wearing the A10. So I cut the engine and restarted. Nothing was wrong with the engine, the Bose A20 is working so much better
The Bose A20, you need to try it on in a long flight, is very comfortable
Goodluck
Ronny