OK, found em' Some folks know how to change a word to blue or somwthing, say something like "here" and there it is, like magic or something, ah, but not me. Don't know how. So... go to STEREO, go to page #6 go down to "60s as studio monitors" go down to Dec 23 or so and look for the graphs, should be there.
The plot for the 50 isn't as flat as the 60, but can't realy expect it to be, however it's a lot better than I was lead to believe, and significently better than my beloved M3s.
happy hunting!

Rich