The modular system once developed by Robert "Bob" Moog went through a long production period between 1964 and 1981, including its development process. At that time, the new, electronic instrument was an avant-garde pioneering work that still had to be explained to the public, but ultimately found more and more interested parties. Behringer has transferred the generously dimensioned dimensions to the compact Eurorack format and paid close attention to ensuring that the sound and function are in no way inferior to the cult object.

The 995 attenuator from Behringer is a passive attenuator with three independent attenuators. An attenuator is always required when a module has no or too few attenuators (e.g. the 904A and 904B filters).