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Sennheiser
![Sennheiser](https://shop.ibrandconnect.com/media/magiccart/shopbrand/brand/s/e/sennheiser-logo.webp)
Sennheiser has set many technological milestones - the first directional microphone in the fifties, the open headphone in the sixties, infrared transmission technology in the seventies and multichannel cordless transmission in the eighties. In the nine