I used to have all kinds of receivers/graphic equalizers, tape decks, big speakers, etc. Very cumbersome unless you like fiddling with that kind of stuff. Now I just go with a couple Bose Sound Touch 30's and a subscription to Spotify. You can use a computer wifi or just use your smart phone. Easy as can be. I can listen to just about anything that exists in the digital world. Granted my ears are not quite as discriminating after flying aircraft for 30+ years, but I find the sound quality very nice. If you have a Bose store in your local mall, stop by and take a listen.
I don't doubt that your hearing has deteriorated!
Ooops, I just started an audiophile war, sorry!
More seriously, I understand, for many people, 'decent' sound is all they are after. Fortunately, if you shop wisely, 'decent' sound can be had for pretty low $.
I haven't looked for this, but I imagine there must be decent wireless speakers that connect a transmitter box to a standard stereo reciever line out, that then goes over-the-air to the speakers (probably all done with Bluetooth these days).
The standard old-school stereo receiver has several "Line IN" "RCA" jacks, which work with CD, tape player, anything with a "Line Level" signal. For a turntable, you either need a receiver with a Phono input, or use a simple cheap phono Pre-amp.
And don't go buy the first turntable you see, many of the new ones with USB and/or Line Out plugs are junk. A decent turntable and cartridge and pre-amp won't cost much, and will sound far better, and treat your records better than some over-hypes modern junk.
You can probably find old receivers super cheap at a thrift store.
edit - cross posted with OldShooter, so check out some of his specific recommendations. FYI, I'm using a pair of Klipsh Heresy speakers bought new in the 80's for my music instrument 'studio'.
-ERD50