Am not aware of any TVs that had a Quad system, but am assuming that the previous poster meant that the 8 track in that set was a Quad.

There were two radio stations in Manhattan that had competing Quad systems. A buddy of mine had a high zoot Panasonic (or was it a Technics?) Quad receiver with a small scope that displayed the 4 channels in graphic form.

He also had a direct drive turntable with a Quad pickup....we'd play the few Quad records then available, but spent more time listening to his "test" record to really appreciate the effect.

I think that today's surround sound systems are effectively better and with fewer speakers to deal with. My modern Sony has a spatial expander dealio that is "interesting"

Question, how interchangable (if at all) are RCA and Zenith color tubes? I realize that they're different animals, but could they be interchanged with effort? Also, what's your opinions regarding picture quality and longevity? Thanks

Anthony