Can anyone helpf me identify what this equipment is and what it might have been used for. I recent bought it as part of a job lot and just to repair for a bit of fun. But as I can't work out what it would be used for I can't begin to fix it. The lower box takes in 10 analogue channels, amplifies or attenuates then and then outputs then through the 6-pin DIN on the back. There is also an amplifier input jack on the rear, marked Pre and Post. The top box has 4 memory chips inside and has a 25-pin connection lead to the lower box. Both require an external DC power supply at +5v, +15v and -15V.
