Harman Kardon
Back in the 80s, Harman/Kardon sold boomboxes that were actually made by Shin-Shirasuna (SILVER):
SR-800 (this is identical to the Silver SR-8000L, please visit that page)
ST-767
ST-W55 (this is identical to the Silver ST-W55)
This is a list of boomboxes sold under the Harman Kardon brand. They were sold in the 1980s.