Acoustics experiments was not a "dumb hobby"... Nor was my experiments in headphone or speakers modifications...
It is "related to an old guy" though yes, because i had plenty of time to do it being retired...
All my system cost is 1000 bucks... All my experiments costed nothing or very low amount, all being homemade with discarded materials or peanuts costs devices then all "old guy" here are not "with more money than sense" ... But some here have less brain than anything else for sure...
Really, who cares? It’s just a dumb hobby mostly related to old guys with more money than sense.