High quality equalizers


Considering with my hearing loss of high frequencies
ptss
Jason Stoddard from Schiit posted this recently:
https://www.head-fi.org/threads/schiit-happened-the-story-of-the-worlds-most-improbable-start-up.701...

“Loki Max is completely insane. It’s really designed to take on the legendary equalizers of the past, up to and including the Cello Audio Palette, which cost $25,000…in 1989. It’s our shot at doing an equalizer that is comfortably part of the highest-end systems…for, say, about 10X Loki Mini’s cost.”

10x the price is $1299 range. No ETA. In the price range it is probably balanced. 16 inch width form factor I assume. 
One of the problems with hearing loss is that it's difficult to determine where you're trying to get to.  They can give you read-outs at the hearing-aid place, but if they adjusted the aids to that, it would be too painful to listen to.  (I.e., it takes time for your brain to adjust).   I don't put in my hearing aids at a concert (some people do); so how would I determine the precise sound I'm looking for at home?     (For some things, you can ask a simple question:  do I understand what people are saying?  like, those kids in the back of the classroom. And you can adjust your hearing aids such that you suddenly CAN understand them.  Trying to hear music, however--that's a completely different animal.)
I've been using a pair of Eargo hearing aids to compensate for my general hearing loss due to age and years in a loud workplace environment. Their top model (around $3000) is made specifically for hi-fi enthusiasts. There are 4 preprogramed volume levels and you can adjust the bass and treble response on one or both ears for each of the 4 programs. They also have preprogramed algorithms for such things as conversation, crowd, theatre venues, etc. Control everything with their ap on your phone. Totally invisible, FDA approved, and rechargeable. Made a big difference for me. Have very limited high frequency hearing. Worth looking into.

J.Chip
you could experiment also with devices such as a BBE or an aphex aural exciter, the latter has a midrange control that is good at boosting clarity of inner voices, plus a brilliance control on top and a big bottom" bass expander, as folks with presbycusis tend to lose bandwidth at both ends.