No question about it. The more devoted to tinkering the stronger the audiophile mania. I'm an easy one to explain. I am a tool freak and have been building stuff since I was 13. But, how do you explain a guy that has trouble with a screwdriver tinkering away with whatever they can manage? I know several of them.
There are levels of tinkering from fiddling with speaker placement to building your own loudspeakers, all with the goal better sound. Where does this come from in us? What evolutionary process developed this instinct? Certainly, if you hear better you can pick up your enemies earlier trouncing through the forest. @mahgister can pick up a mole at 50 yards.