-
From a quick Google:
Two record players could be connected, initially both of the type with ceramic pickups, though an optional preamplifier could be fitted inside the Beomaster so that a B&O magnetic pickup could be connected directly.
The matching turntable was also available with an optional inbuilt phono stage, so if I wanted another one I'd need that for the other channel on the amp.
Lighting flash of inspiration. One is probably MC and the MM. Moving coil or Moving magnet.