Fixed Filter Controller

Custom Controller for the Behringer 914 Fixed Filter Bank.

A simple passive control module for the Behringer 914 Fixed Filter Bank. This module is a convenient, 6hp module that is simple to build using readily available components and provides additional functionality.

The module has switches to select the wet or dry signal (WET/DRY) and to enable regeneration (BOOST/OFF) via a feedback loop. The amount of regeneration can be adjusted using the attenuator (labelled ‘AMOUNT’) which also avoids overloading the input to the FFB.

The ‘overdrive’ switch is peculiar to my own system which uses an AJH Synth Transistor Ladder filter that provides for overdrive via a jumper on its circuit board and this switch replaces the jumper.