Yep thats correct but even on a low volume it still makes it hard for me to hear the coms via the headset.
35 years flying have had an effect on my hearing and it's not a good one.
I am aware of many arguments in favour of not turning the speakers off but I'm asking for assistance in finding material that supports my side of the issue. Specifically any authoritative articles or FCOM/FCTM references etc.
Thanks