old ears

Do you have zero hearing ability in the upper frequencies, or reduced hearing in those frequencies?
If you have reduced hearing like when the audiologist tells you you only hear 25% in that range then you are probably looking for a bump in those frequencies from your system.
Brightening your system can compensate and there are many ways to do it with speakers, components, cables, etc. It doesn’t only have to be new speakers with more treble output. There could be more cost effective solutions. You could try a super tweeter on top of the speakers you already own. Or you could add an EQ to your component stack and jack up the high frequencies. The EQ option might only cost a couple hundred dollars depending on what you choose.

The ultra low budget option, and I’m actually being serious here, are Ear Glasses. Google it. They work.

Thanks for the suggestions. 

Consider used, and you can find something up to twice your budget.

My hearing is down @7Khz with tinnitus-your hearing is great!

Of course you want to listen to everything you can. Loki is an inexpensive, noiseless equalizer from Schiit. If you already have passable speakers, you might try that first before investing a lot of money in a more radical solution. Another way to look at it is to maximize the range of frequencies you are able to hear to find the one most pleasing to you, without paying attention to what’s missing. I think it might be a trial and error process more than doing what an expert might tell you to do.