TIL of the "King of All Boomboxes", the JVC RC-M90, which was produced in 1981. LL Cool J and The Beastie Boys made this boombox famous by including it on their album
M90 Radio 89.9
This is what a JVC M90 is really worth! | Stereo2Go forums
Amazon.com: New Wave Toys M90 Micro Blaster Replica Boombox Portable Wireless Bluetooth Speaker with 40 Inch Silver Necklace Chain, Dual 6W Micro Speakers, 20 Hour Playtime : Electronics
ANT POWER Mini M90 Bluetooth Mini Stereo Radio Owner's Manual - Manuals+
Vintage Victor RC-M90 Large Radio Cassette Player Energization Confirmation Junk | eBay
Victor RC-M90 aka JVC Boombox grail front Pictures, Victor RC-M90 aka JVC Boombox grail front Images, Victor RC-M90 a… | Boombox, Vintage radio, Vintage electronics