The company was founded in 1945 by Ludwig Eisenbarth (*1909 in Oettingen; †1992 in Passau) in Passau. He learned the organ building trade in his hometown of Oettingen with Steinmeyer. In the early 1950s, the company's premises were built in the Grubweg district. Until around 1960, Eisenbarth mostly built organs with electric or pneumatic slider chests. Even during the peak of neo-Baroque organ building, Eisenbarth's work showed clear southern German influences in the voicing of the pipes.

In 1962, the founder's son, Wolfgang Eisenbarth (*1941 in Oettingen), joined the company and took over the management of business and organ building in 1987. With the change in company management, the transition to mechanical slider chests took place. Wolfgang Eisenbarth's goal was to combine Italian and French Romantic tonal characteristics. A utility model protection was granted for the double and multiple valve control developed by Eisenbarth. In 2001, the company opened its own pipe making workshop. In 2004, the company became a GmbH under the management of Agathe Eisenbarth and her father Wolfgang Eisenbarth. In October 2022, provisional insolvency administration was ordered. After restructuring, a new start was made on December 1, 2022, with two managing directors, Wolfgang Eisenbarth and Cosmas Fruth.

https://de.wikipedia.org/wiki/Orgelbau_Eisenbarth
https://orgelbau-eisenbarth.de/