Oh yes...those and others...
Sanyo marketed some pretty impressive (read: big, gaudy and built mostly to impress those who don't know) speakers of various sizes, many of which were shipped with their all-in-one 'console' systems or smaller component packages they marketed in the 70s and 80s.
I suspect the speakers you are refering to came from one of the larger pre-packaged systems. These were marketed to those who didn't want to have to pick out the components themselves but would buy a recognized brand name instead.
Some of them were surprisingly well-engineered but that didn't extend to the whole line.
Cheers,
David