Sennheiser

Sennheiser electronic SE & Co. KG is a third-generation family-owned German audio engineering company headquartered in Wedemark near Hanover, founded in June 1945 as Laboratorium Wennebostel by electrical engineer Fritz Sennheiser. In fiscal year 2025, the independent Sennheiser Group generated €463.1 million in professional audio and business communication revenue while reinvesting €48.0 million (10.4% of revenue) into acoustic, RF, and DSP research across 2,171 employees. Sennheiser invented the shotgun interference-tube broadcast microphone in the 1950s and the world's first open-back headphones (HD 414, 1968), establishing reference benchmarks such as the HD 600/HD 800 S audiophile series and the electrostatic HE 1. Together with Berlin studio legend Georg Neumann GmbH (acquired in 1991) and AMBEO 3D spatial audio software, Sennheiser equips concert tours, broadcast stages, recording studios, and enterprise ceiling-array conference rooms worldwide.