Bunny Brunel used extremely light strings for his jazz-wank. One of his students, an Asian chick (forgot her name, Allan Holdsworth associate) did it too. I think the low-B was something like 38...
The D'Addario rep. was quite adamant (30+ years ago) that there is no way to get the fundamental low-B without a string that's approximately the diameter of a pinky finger.
