I had a Mark Levinson JC 1 or 2, whgichever was battery powered. I kept my Audire, but the other was equally as good. I don't think anyone should be anal enough to worry about either designer. They are both excellent, but Probably Nelson. He has a great attitude. Of course JC designed the crossovers and controls for the greatest system ever: Google: Dead's Wall of Sound, Images. 30+ McIntosh amps and zillions of dedicated JBL drivers, including a separate system for each of the five bass strings. Nearly unmeasureable IM distortion, even from the speakers.