The company was founded in 1945, just a few weeks after World War II, by Fritz Sennheiser and seven fellow engineers of the University of Hannover, Germany, in a laboratory called Laboratorium Wennebostel. The laboratory was named after the village of Wennebostel, where it had been moved due to the war. Its first product was a voltmeter. Labor W began building microphones in 1946.

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