me thinks he hath... but he doesn't want to bum out the rest of us Jupiter nuts
all I know is, like your son D, Originally my cornwalls had a very narrow spot in the db range where they sounded what I thought was good... out side of that range it DID hurt my ears to the point I began thinking, "this is torture and what's the point here... keep these things or sell them and try and improve my listening experience".
Post upgrade, life is for once full of pure joy and I find myself reinvigorated with the passion for the "listening experience".