Thanks Larry, I was touched in my "audio heart" when you mentioned the Dynaco around 1973 I had an sca80Q with an outboard Quadapter (still got them) I had the 300Watt Dynaco amp, & sets of: A10's, 25's, 35's, & 1 A50 for bass -god it was hugh! (I also picked up a set of 3way dynaco's around 1980 forget the model #) I lived in that first arena of passive surround sound. Stereo sounded to me after that like mono. I went prologic in 1990ish & only in the last 4 years with the latest set ups did I really think there was a remarkable difference from the 4 Dimensional sound.
Again my Lonsman (if I spelled it right) thanks for the sharing & the help you freely offer to those like me who can use a friendly hand.
Doug