dsorcerer:
After years of occasional searching, you are the first person I have encountered who recalls that handsome receiver. My brother owned one, and it was indeed a beaut. Spectrosonic was one of several Pacific Stereo house brands, and apparently a number of receivers were marketed under that name, but only one was styled like the one you describe. If I recall correctly, one issue of Stereo Review actually had a cover photo of Julian Hirsch holding that receiver, but mysteriously the magazine's contents made absolutely no mention of it. Best speculation is that this was clever marketing. Stereo Review was owned at that time by CBS, which owned Pacific Stereo. But Pacific Stereo never allowed their house brands to be reviewed (even though some, such as the Concept line, would have shown very well), because it did not want any of their products to outshine the mainline brands that its stores carried, such as Pioneer, Marantz, Sansui, Harman Kardon, etc.
My recollection is that the receiver, while not especially powerful, performed very well, except that its blue light exhibited a slight hum that would be annoying to audiophiles.