I think all synth manyfacturers "stretch" the specs of their instruments a little in their advertising. But I think Roland does this less than som other manufacturers.

Besides, I think the biggest problem here is the manual. We just don't understand what Roland is trying to say. I can't remember any of these "statements" about boosters in my XP-60 manual. I never got the impression that they could be controlled in this way.

Stig