CNETNate writes "A tour of Sennheiser's Hanover factory reveals for the first time how its audiophile headphones are assembled by hand. The company recently announced its most expensive and innovative headphones to date, the HD 800, which discarded the conventional method of headphone driver design for a new 'donut-shaped' ring driver idea. Only 5,000 of these headphones can be made in a year, and this gallery offers a behind-the-scenes look at the construction process."
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