@brubin I'm sorry, but the reductio argument really doesn't work.
A speck of dust sitting on a finger-tight brass screw holding one of the drivers *might* make a difference, but it's well beyond the threshold of audibility, even to bats.
A speck of dust sitting on a finger-tight brass screw holding one of the drivers *might* make a difference, but it's well beyond the threshold of audibility, even to bats.