peterc005
I bought an ANR kit for my DC 10-40 from "Headsets Inc" about ten years ago and it works really well.
That was one of the sites I was looking at.
Surprised there is no reply from someone more recent than 10 years ago.
It appears the ANR upgrade would cost around $320, Whereas I could buy a brand new Pilot PA18-50T for around $450. That may be the reason for so few ANR upgrades for David Clarks nowadays.
Certainly seems a waste having a DC10-30 sitting in the cupboard, but perhaps that is where it should stay.
Thanks for the replies.
Cheers