The T1’s ear cups are manufactured by our partner in Karlsruhe. We have a history of more than twenty years of co-operation. What is so special about this: the company processes the stainless steel material we require. We were also impressed by the high level of experience in handling and producing customised, precisely etched hole patterns so that our open high-end headphones T1 also offer our customers the best quality in sound and design. In order to ensure the best possible quality for both the T1 and T5 ear cups, we have opted for two different companies in this case.