Need some treble

I'm not streaming. Strictly records and CDs.  Tweeters are working.

Thank you all for your suggestions - except maybe the one about the earcups.  I've decided to try out one of the Schitt equalizers and see if that solves my problem.  My question is, since I'm only interested in increasing the treble frequencies and not messing with anything else, should I go for the basic Loki Mini*, or is there any reason to get the more expensive Lokius?

My high frequencies are attenuated, not non-existent, so boosting them makes sense to me.  Getting ready to order my Lokius.