That is not true.
That everybody's hearing deteriorates with age, is inescapable. As you get older the tiny bones in your ears wear slowly and the range of hearing is reduced, especially reducing the ability to hear high frequencies.
i know it but i´m not remenbering how good systems sound in the 70s,
i put them all conected side by side using the same source and speakers and that´s when i notice the increase of quality when using older and very good equipment ,
i had not money to buy it all but i had it from family , and they still are better ,just take a look at the building quality of some new amplifiers and compare them as if in the 90´s there was no high-fidelity in sound ,
it already existed in the 50´s with a modern source or even new speakers it sounds amazing good and not all were restored so even with 50 years or more of use they still can sound better,
even the 90´s, A-717MKII from Pioneer it´s very good and no separate till some level of quality ,will reach that level.
Separates are good but not any can be higher in quality , i saw a hegel pre and power amplifier that if conected with some CDM 1 from B&W it couldn´t even come near the integrated amplifier from Pioneer i´m refering to,
as source i was using both Rega P1 turntable with Hana Umami red cartridge and a CEC TL 0 3.0 CD player using both mission 761 at 4ohms and and the CDM 1 from B&W at 8ohms,
if someone doesn´t know CEC it´s known by chuodenki and since mid 70´s that i know of, it made a lot of turntables for other brands ,well known ones,
the newer system was a MA900 receiver from Magnat(tube pre-amplified)which includes some modern features, as old sources, a Technics 78 SL-1310 with a old cartridge the 207C mkII using a cd player PD-7300 from pioneer,
tested with the cd Draconian times from Paradise Lost, also Teho Teardo & Blixa Bargeld ,Still smiling , in vinyl i put to play Before we were so rudly interrupted from Eric Burdon & the Animals and "Electric" from the Cult also" I´m not there "the O.S.T.
also as extra tracks in compact disc ,
the first Billie Eilish album with the track, "Bury a friend ",
Cuby and the Blizzards from the American O.S.T. , "window of my eyes" (a older version) ,
"if we were vampires" from Jason Isbell and the 400 unit from the LP Nashville sound ,
"four seasons in one day" Crowded house from the Lp Woodface ,
"let´s dance to Joy Division" the Wombats from the Lp proudly presents...a guide to love, loss & desperation
this is only a example, but enough to prove my point,
or that in the 90´s there were already very good components not going to refer 70´s components as some here it seems not knowing what happened in the 90´s, it weren´t the midle ages,
Results: all sound good only the CEC cd player releases a more deep sound not that the PD-7300 from Pioneer doesn´t sound excelent and at some tracks doesn´t stay very far from the CEC, the turntables ,the technics make all sound good , the Rega makes some records sound very deep and all sounds heard, both release a almost live sound,
this was made in April, 21 of 2024, Beja, Portugal