The D-50 was the first portable CD player when it launched in 1984. More important, it stirred public interest in compact discs at a time when cassette tapes were still the norm. Small as it seems, the D-50 did not have its own power source, so it required a comically large battery-pack case that significantly increased its overall size. But some of the battery packs included shoulder straps in case you wanted to carry it around.
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