As a follow-up to my previous post, I knew Steve when I was living in Western New York. He used to voice his work on Magnepan speakers (MGIII and MGI if I'm not mistaken). I don't know if he still is doing that or not.
His "design" for the B&K ST-140 relied rather heavily on the prior art of Frank Van Alstine on the Mosfet 120B. At least if you are going to crib, crib from good designs.
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