Not serious but these remind me of the Sony Drum speakers that were on show at Kegworth . it would seem a few Japanese companies were smoking a little weed at the design stage on their products.
https://www.ebay.co.uk/itm/Pioneer-CS-06A-Rare-Vintage-Speakers/163115660752?hash=item25fa7375d0:g:jf4AAOSwtoVbMKWO
https://www.ebay.co.uk/itm/Pioneer-CS-06A-Rare-Vintage-Speakers/163115660752?hash=item25fa7375d0:g:jf4AAOSwtoVbMKWO