The existence of diminishing returns and diminished hearing are not in any way, matter, or scope related, correlated or relevant to each other in any meaningful, significant, or substantial way.
Anyone (everyone) care to throw a dart?
I understand my hearing at 69 isn't even close to what it was at 19. I'm sure your results may vary. However, anyone care to throw a dart at the price point where diminishing return kicks in? There must be one out there. Regards, AB