It's just a radio but cool military style from Panasonic 1977 https://patents.google.com/patent/USD243630S/en?inventor=Shinzo+Murakami
Another groovy tape deck from Panasonic 1974, these cool ones were the ones you'd bring to the park or beach. https://patents.google.com/patent/USD230609S/en?inventor=Takemi+Ebata
Black & Decker Worksite Radio from 2002 https://patents.google.com/patent/USD310529S/en?inventor=Kikuo+Ohta
One of the last Sony Cassette Boomboxes from 2001 https://patents.google.com/patent/USD455728S1/en?inventor=Kikuo+Ohta
From Electronics Illustrated 1972, Wollensak Model 4515, a very early boombox but a crappy photo, too bad it looks kind of cool. This may have also been branded as Roberts and 3M was known for working with AKAI back then so there might be some AKAs (also known as). The list price adjusted for inflation is $617.00 USD, electronics used to be heavily discounted so it might have retailed for around $350.00 in today's dollars!
Some news on the new Telefunken HiFi Studio 1 and the Sony XF-5000 Transsound from CES 1981 and Stereo Review Magazine
The Sankei TCR-1000, I was looking for information on Sankyo and this beautiful model from 1977 came up.
Did you notice the price bottom right ? $1269 in 2020 money according to the first US inflation calculator google found me. Buying a box like this was the equivalent of buying a top of the range Smartphone today (although of course most people get their Smartphones as part of a monthly contract).
It's a really nice box for the time, all those cool knobs, meters and switches. Pricing was probably store price = $150.00 USD and a $30-50 markup, they probably retailed for around $199.00. Even little transistor radios were "expensive" back then, they went for around $8.00 which seems cheap now but for a kid it was big money.
"I would stack them floor to ceiling...God, seven, eight feet high, six, seven rows across, and in a week or less they'd all be gone." That would have been a sight!
Maybe the perfect boombox? I listen to my mono ION Jobrocker a lot, who needs stereo when your hanging out in the yard? I'll have to look through the patents to see if JVC had anything on this, for some odd reason, the other manufacturers didn't make monster mono-boxes.