
The popularity of both four-track and eight-track cartridges grew from the booming automobile industry. History Development of tape cartridges įactory installed AM/FM radio/8-track unit in a 1978 AMC Matador with a Briefcase Full of Blues cartridge in "play" position After completing a program, the head mechanically switches to another set of two tracks, creating a characteristic clicking noise. The player's head reads two of these tracks at a time, for stereo sound. The magnetic tape is wound around a single spool, is about 0.25 inches (0.64 cm) wide and contains 8 parallel tracks.

The cartridges have dimensions of approximately 5.25 by 4 by 0.8 inches (13.3 cm × 10.2 cm × 2.0 cm). Little Lost Girl Media from Oregon is currently still making 8-tracks and runs a mostly 8-track rock n roll record label. Cheap Trick's The Latest in 2009 was issued on 8-track, as was Dolly Parton's A Holly Dolly Christmas in 2020, the latter with an exclusive bonus track. The 8-track tape format is now considered obsolete, although there are collectors that refurbish these tapes and players as well as some bands that issue these tapes as a novelty.

The Stereo 8 Cartridge was created in 1964 by a consortium led by Bill Lear, of Lear Jet Corporation, along with Ampex, Ford Motor Company, General Motors, Motorola, and RCA Victor Records ( RCA - Radio Corporation of America). After about 80 minutes of playing time, the tape would start again at the beginning.

One advantage of the 8-track tape cartridge was that it could play continuously in an endless loop, and did not have to be "flipped over" to play the entire tape. The format was commonly used in cars and was most popular in the United States, the United Kingdom, Canada, New Zealand, Australia, Mexico, Spain, France, Germany, Italy, Sweden and Japan. The 8-track tape (formally Stereo 8 commonly called eight-track cartridge, eight-track tape, and eight-track) is a magnetic tape sound recording technology that was popular from the mid-1960s to the early 1980s, when the compact cassette, which pre-dated the 8-track system, surpassed it in popularity for pre-recorded music. The black rubber pinch roller is at upper right.
