1) Audio equipment manufacturer
Found on
https://www.crosswordclues.com/clue/optonica
Optonica was a subdivision of Japanese electronics manufacturer Sharp that made high end hi-fi products systems. ==History== ===1976=== The Optonica brand was created and first launched by Sharp in 1976 to compete in the high-end audio market along with established brands such as Sony, Panasonic, Sanyo, Sansui Electric, Yamaha, Nakamichi, Onkyo, F...
Found on
http://en.wikipedia.org/wiki/Optonica
No exact match found.
