I pulled out my copy Stereo AS9243I got the link from some post here but do not remember where. I have it saved for future updates to the discography
Cleaned it Put it in the laser player then into the QSD1
The music? is not to my taste but I sat there and played it thru
I have 4 display units and the Scope plus my ears
I am 99pc sure that it is QS Quad
There are many solo rear channel effects that could only come from Quad
Ron