Stereo-Pak
Videos
The Muntz Stereo-Pak, commonly known as the 4-track cartridge, is a magnetic tape sound recording cartridge technology.
Stereo-Pak player close up
Stereo-Pak player with cartridge
Endless tape cartridge
Videos
An endless tape cartridge is a tape cartridge or cassette that contains magnetic audio tape that can be played in an endless loop, without the need to rewind to repeat.
Endless compact cassette from Panasonic (30 seconds)