musicsearch twin-deck biamp panasonic egg cdplayer ported-speakers 3wayspeakers digital tuner soft-touch-controls 10-d 1-piece fm presets Panasonic RX-DT75
Yes, this is an egg, not a "box" like the classic boomboxes of the 70's and 80's. But, eggs produce more bass per square inch. Why? Because the shape gives designers more freedom to create ported enclosures around the speakers. With a traditional boombox, a lot of the bass gets lost through the back panel, or gets bounced around the circuit boards in random ways, or vibrates the chassis until it makes unwanted noise.
Like most of Panasonic's "Cobra-top" models, the RX-DT75 has two tape decks that sit under a door which also contains the main control panel. It also has a CD player and a digital radio tuner.
There are a total of 6 speakers. The tweeters are located next to the CD slot. The woofers are next. Then the midrange speakers are on the outside corners. All of these speakers are driven by a bi-amp design, in which the woofers are driven by the "low" amp, and the mids and tweets are driven by the "high" amp.
The woofers have an unusual surround, called a "Push-Pull Edge". See the photograph below. Owners have reported needing to replace these surrounds, due to rot. Some people have even used aftermaket speakers. See this thread for example:
http://boomboxery.com/forum/index.php/topic/3419-woofers-for-a-panasonic-rx-dt75/
The RX-DT75 takes ten D-cell batteries and four AA's for memory.