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Enlarge this image Headphone company Ossic announced Saturday it was shutting down, having delivered just 250 of the 10,000 pairs of virtual reality headphones that its backers had crowdfunded. David Becker/Getty Images hide caption toggle caption David Becker/Getty Images A California startup that sought revolutionize audio headphones, promising personalized devices that would produce sound "indistinguishable from reality," has found that raising interest among investors was easier than delivering the goods. Ossic raised more than $3.2 million in crowdfunding for its Ossic X, which it touted as the "first 3D audio headphones calibrated to you." But after delivering devices to only about 80 investors who'd paid at least $999 to for the "Developer/Innovator" rewards ...