AJH Synth MiniMod Gain Switch Expander is a 2HP wide add-on module to the MiniMod VCF and VCA for the Eurorack system. The module has two toggle switches which make the functionality of the gain jumpers of the filter and the VCA quickly accessible. For this purpose, the connection cables are plugged onto the back of the module instead of the jumpers. To make good use of the space, there is a 6-way multiple on the rest of the front panel.