I've decided that ICBM was right.

fretmeister

That just means you've picked the wrong flats!!!  

fretmeister

Actually - I have to make an admission...

For a particular thing I'm working on my J has a set of Dunlop Stainless Super Bright roundwounds. They are not actually as bright as D'addario Prosteels but seem to have a bit more low end.

I wish I knew something / anything about metallurgy as to why strings can make such a difference.