@dekay Understood. Your suggestion reminded me of a post here from several years ago. I think it was Tvad who mentioned the studio tweak of hanging a sheet of TP in front of the tweeter.
@gondo101
It did take a LOT of time and experimentation - several years - to tame the Forest's highs but it has been accomplished and I'm not suffering ear bleed listening to older CDs from the early days of "perfect sound forever". So it is possible to overcome this shortcoming with the right combination of wire and gear. On the other hand, much as I love my Forests and plan on keeping them, I do tend to agree with
@jond and wonder if they are not a bit "
declasse" compared to the rest of your system. If simple "non-destructive" tweaks don't work, it would seem silly to recommend changing out any of your electronics to "force fit the Forests". The better solution, as others have mentioned, might well be to start auditioning speakers to find some that are a better match for your gear...as intimidating as that prospect might be. Maybe something from the Sonus Faber line would work. Years ago, I heard a system with SF's Guarneri Homage speakers driven by ARC tube separates. It made a lasting and very positive impression. Not sure what the current version of these speakers would be. Good luck finding a solution that works for you.
https://www.stereophile.com/standloudspeakers/487/index.html