Putting £54,000 headphones to the test
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Sennheiser's HE-1 - £54,000 headphones - put to the test

BBC Click's Spencer Kelly tests the Sennheiser HE-1 headphones which come with a built-in amplifier using vacuum tubes. Only one pair of the handmade headphones are made in the factory each day.

See more at Click's website and @BBCClick.

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