At 90, my ears are creating a problem. What sounds good to me, sound sharp to others with normal ears. What sounds good to other people, sound muddy to me.

If I play music for the groups that meet at my home – or go to my neighbors with my KMA, (easy to carry) how do I set an acceptable EQ?

I have given this problem much thought --- I am looking for some suggestions.
Thank you, John C.