This is the Sharp GF-9292. It is part of the Shapr 9x9x series that included the GF-9090, GF-9191, GF-9292, GF-9494, GF-9595 and GF-9696. The big brother is the GF-9696. The GF-9292 is smaller has two 7 inch woofers and two 2 1/4 inch tweeters. Its dimensions in inches are: 21L x 5D x 11H.
It has a single cassette and most controls on the top panel.
One of these boxes recently sold in decent condition but with a dysfunctional tape head, broken antenna and corrosion in the battery compartment for $220.00
One of the Holy Grail's of boombox collecting is the Sharp GF-777z or GF-777. One of the first boomboxes with double cassettes it was also produced in Japan as model GF-909. The GF-777 has six speakers - two woofers, two "sub" woofer's and two horn type tweeters. It weighs almost 27 pounds (12.2 kg) not inlcuding the 10 D sized batteries required to power it.
The boxes routinely sell for $500.00 to over $700.00 depending upon condition. I recently saw one sell for $19.99 via buy it now. LOL. Perhaps the seller didn't know what they had? Someone got a good deal!