After some chat with an old tech guy I got to know that
One of the largest Cinemas in Göteborg ( Swedens second largest town ), Cosmorama, which had 800 seats, used B&O equipment.

4 Beolab 5000 feeding the cinema speakers, which was large AGA honrs
A Beocord R2R and a Beogram for pause music. 

The Cinema do no exsit anymore, was redone into some other commercial use in the middle of the 80th.

The image is from the cinema