Click to enlarge.

Nice, thanks for the upload!  I have this box and it sounds great for its small size!  Very clear highs.

https://www.youtube.com/watch?v=9HxUnCCgUcY

I won this model ( H:2016 Year3 March 2016Ebay March 201630 March 2016 Hitachi TRK-8100 line in boombox 9 volt  and soon I will hopefully repair the cassette deck in mine and then post a video too - though mine does not have the very nice door sticker as seen in your video