Anyone have experience with using de-esser for sibilance in home audio system?

Is this with all sources or just turntable? Do you have horn tweeters or mids?

I ask because one of those or both can often cause sibilance and it may not be you. 

CD only. No horns. Tweeters are soft-dome. Recently I also started experiencing sibilance when listening to music on YouTube via inexpensive PreSonus monitors in our home office, which hasn’t always been the case. It was this development that led me to conclude my hearing is at fault.

If my logic is faulty I’m open to other interpretations but swapping out cables, transport, dac have had no effect. Nor has closing drapes and draping fabric over other hard surfaces in room

I had my hearing tested last spring and was told it was better than normal for someone my age and that nothing in the test data suggested a link with sibilance

This has been going on for a year, now and I’m pretty darned frustrated

If your home office and your main listening room have similar acoustic problems (ones that cause sibilance) then your inference it is your hearing could be wrong.

Right -- I can’t definitively rule that out. They both have lots of glass but as I mentioned, shutting (lined) drapes has no impact. They both have 10.5’ ceilings. Listening near-field with PreSonus monitors.

Believe me, Dave; I’d be very happy if it turned out to not be my ears! But nothing I’ve tried so far has had any effect. I haven’t swapped out the Hegel yet but will tomorrow, when a Heed LaGrange is scheduled for delivery. I’m also considering a Vincent hybrid integrated.