Finally got around to finishing these. I had bought them on CL about 2 years ago and... well, you know  Here's the thread from when I first bought them: http://www.classicspeakerpages.net/IP.Boar...?showtopic=2496 Thanks to Andy and Steve for providing info. And Greg, who provided the Owner's Manual that is now in the Library. In that thread, Steve F reported: High Fidelity magazine tested it in August 1970, and described it as "…a modified air-suspension type in which an auxiliary,