Deutsche Elektronenröhren Manufaktur GmbH is the manufacturer of ELROG vacuum tubes. The company was founded in August 2016 by Thomas Mayer, a designer and manufacturer of vacuum tube amplifiers. Initially, ELROG tubes were manufactured by ELROG Elektronenröhren GmbH & Co KG, a company founded in Lüneburg in 1986. The company’s roots can be traced back to the renowned Telephone tube factory in Ulm. In 2016, due to financial problems, ELROG was forced to enter bankruptcy proceedings. Deutsche Elektronenröhren Manufaktur GmbH acquired all assets, production machinery, brand name, and proprietary technology. ELROG tubes continue to be produced on the original production line at the last site of the former ELROG GmbH in Hagnau, Mecklenburg-Western Pomerania. Deutsche Elektronenröhren Manufaktur GmbH is headquartered in Lindau, near Lake Constance.

Since the new company was founded, all tube designs have undergone significant upgrades to improve sound quality and long-term reliability. The product portfolio has expanded from the initial 211, 845, and 300B lines to now include 10 different tube types. These tubes are entirely handcrafted in Germany by highly skilled and passionate individuals.