STG Soundlabs Post-Lawsuit Lowpass Filter - Eurorack 4-Pole LPF

This filter is not a clone of the ARP 4072 submodule. It does, however, have an identical topology with the same transistors and operational amplifier array. Some people may find this is close enough to use the "C" word but not here at STG Soundlabs, so in tribute to the origin of this filter design it is called the Post-Lawsuit Lowpass Filter.

This module is now firmly in revision 2 now. New features include a 1 pole output in addition to the normal 4 pole, user-selectable feedback gain compensation, and is now skiff-friendly at a depth of only 1.5 inches and 14HP of horizontal pitch.