DENON DR-F Series January 1981

An accordion fold-out from DENON about the three-head DR-F cassette decks. On the outside the leaflet argues that a three-head deck needs tension servo (テンションサーボ) and direct drive, the way studio open-reel decks do, and shows a cutaway of the insides. Inside are comics on how to use these decks: Dolby C, three-head recording monitor, MPX filter, microcomputer tape tuning. The top model gets quartz D.D. and a computer; the bottom one is the same mechanism without the microcomputer.