I just reached mine yesterday adding a second sub to my stand mounted integrated amp driven CD player. I started when I was 20 now 75.
Now I gotta focus on increasing my hearing range, which begs the question what is listening thru hearing aids like?
"More than 40% of people over 70 have difficulty hearing, compared to around 5% of people under 40. On average, the hearing threshold worsens by one decibel every year after the age of 50."