Although nowadays I usually fly with my BoseANR headset, I still have the first aviation headset I ever bought: a venerable DavidClark H10-40 that I bought back in the 1970s, now covered with scratches earned duringmany years of faithful service in the cockpit. It has new gel ear seals, but has beenrelegated to back-up and passenger use since I switched to noise-canceling headsets in thefront office.
This is a companion discussion topic for the original entry at https://www.avweb.com/ownership/anr-retrofit-making-an-old-friend-better