This was all single mic cables - no snakes. It was cheaper and gave a better result than using multicore. This build was in 1977 and there was a lot of top quality mic cable just appearing in the pro-audio marketplace. The wrap was using small cable ties pairing cables - the inner cable of a pair connected to the next cable and so on until there was a flat band of cables, with the cable ties running in a tight diagonal line, these lines 600mm apart - each flat of 12 cables was then connected at the outside edges to another flat set of 12 giving a 24 cable run. There were two of these runs running around all the wall plates, one in each different direction around the walls, each plate’s cables were fed through the mounting block and soldered to the XLR’s and Jacks. Headphone sends were via a separate 8 cable block in a separate segment of the duct - the duct had a large and small channel and the cable groups were held in place using sticky cable tie mounts in the back of the duct and loose large cable ties. All wall penetration points had a string “mouse” left in place for any additional cables that might need to be drawn through. Power was all fed in steel conduit or duct separated by at least 1Metre from the audio ducts. All the run lengths were pre-measured, cut to length and cable tied in the car park - the shorter runs at the front of the cable group and the longest at the back. Took me less than a day to make up the runs.
