JVC RC-M90 8-Band Stereo Radio Cassette Recorder (1981) "The King of Boomboxes".

Introduced in 1981, the JVC M90 is considered by many to be the "King of Boomboxes". It was on LL Cool J's "Radio" album cover. While the knobs do not have the "detented" action found on many hi-fi products, that's typical for a boombox.