Anyone (everyone) care to throw a dart?

The existence of diminishing returns and diminished hearing are not in any way, matter, or scope related, correlated or relevant to each other in any meaningful, significant, or substantial way.

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OK is that a yes, a no, a maybe or you on the fence.. What did you say?
Must be the Mayor of something with an answer like that.. ;-)

I’m confused.. You got my vote.. It worked.. LOL

My MIL paid 5K, I almost passed out.. I had quite the talk to the guy that sold them to her at 96 years old..
They became 2K hearing aids with one talk..
I had a personal friend that did nothing but Hearing aids his whole life.. He was smart..
Sure helped my with inserts for years..

Regards

Dear Doctors in the house, my hearing is quite good actually. Was once asked during a hearing test if I could hear dog whistles. The gist of the question was does a $4K HDMI cable for example justify an improvement in sound over a $1K cable to the tune (get it?) of $3000?

What does your hearing have to do with anything? You're a human being not a tape recorder. If you enjoy music, if something will bring you even more enjoyment, do it. If you came looking for validation, sorry, not my department.

"...The gist of the question was does a $4K HDMI cable for example justify an improvement in sound over a $1K cable to the tune (get it?) of $3000?.."

The real answer is: Depends on the cable more than what it costs. 

For a simple one source system, either analog or digital, speaking new equipment and average medium size US room, I would say $100k is enough to get a great sound. Spending more may not be worth it.