The distinct, analog “kerchunk” sound is most famously associated with William Lear (also founder of the Lear Jet Corporation), who invented the 8-track tape cartridge system, a continuous-loop stereo cartridge for cars.

Conceived in the mid-1960s, the 8-track tape was designed for automotive use, which was adopted by Ford in 1966 (the Sporty Mustang, Luxurious Thunderbird, and High-end Lincoln), where its mechanical, heavy-duty mechanism—when pushed into the player—produced a satisfying, iconic “kerchunk” sound.

RCA Victor introduced 175 Stereo-8 Cartridges from its RCA Victor and RCA Camden labels of recording artists catalogs

The 8-track’s popularity lasted through the late 1960s and 1970s, making its distinct sound a classic feature of car audio.

Cash Box October 8, 1966…