It made its own player - the Monarch Automatic Record Changer
that could select and play 7", 10" and 12" records at 33, 45 or 78rpm.
Automatic record changers
let devotees place a stack of records on a spindle and sit back to enjoy the music as one disk after another dropped onto the platter.
In the 1960s, Koss bought a maker of manual turntables - just as automatic record changers
were taking over the market.