not to sidetrack the thread but this reminds me of my KLH-1's with
"Infinity" drivers.around 79 was it that Infinity bought/owned KLH(in name)?
The OPs speakers were a few years earlier than the KLH-1 which was closer in time to the 1982 RS-1b.
I've heard it mentioned Infinity was test running drivers in those speakers produced by "KLH Research" etal.